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Installation Instructions

Before You Start

Slope limitS

• Read these entire instructions thoroughly… to ensure a problem-free installation.

• Use the illustrations and icons… throughout the installation instructions to help guide you through your installation.

• TruSlate® Premium Roofing System… is designed for all slopes from 4:12 vertical application. Special installation techniques are required for slopes from 4:12 up to and including 5:12 (see page 8 for details).

• Do NOT install… on slopes less than 4:12.

Start everY truSlate® project With SafetY in mind!

protect YourSelf and otherS...1. ALWAYS… wear appropriate clothing and footwear.2. Reduce tripping hazards… keep the work areas organized

and clean.3. Beware of “in-between” roof slopes… a “walkable” roof may not

be walkable once the slate or shingles are stripped off. A slope of 6:12 and higher generally becomes unsafe after being stripped.

4. Wear proper footwear… soft-soled boots help provide the best roof traction.

5. Roof deck protection provides traction… properly installed roof deck protection helps provide a walking surface with enhanced traction.

6. Store material safely on the roof… OSHA recommends keeping material at least 6' (1 .83 m) from the eaves and the rake edges to reduce the chance of falls.

poWer nailer SafetY

1. Check the operation of the safety… never tie back or disengage the safety.

2. Operate when in position… only use when the gun is on the material to be fastened.

3. Do not rest the tool against your body… to eliminate misfires.4. Always wear safety glasses… to protect from flying objects.5. Use caution with air power…

• Only use clean, dry compressed air. • Disconnect the air supply as soon as you are finished with

the tool. • Never work on the tool while connected to the air supply. • Inspect hoses for breaks or leaks.6. Keep the tool clean and maintained properly… for safety and

long-term use.7. Never point nail guns at people… these tools are not toys and

should not be played with.1

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2

What materialS and toolS do i need to inStall the truSlate® premium roofing SYStem?

Step 1:

12" x 12" (305 mm x 305 mm) Field Slates… natural quarried roofing slates used to cover the primary area of the roof. TruSlate® Field Slates arrive at the job in crates with enough slates to cover approximately 500 square feet (5.0 squares) (46.45 m2). • There are 120 TruSlate® Field Slates per 100 square feet (1.0 square) (9.29 m2).

16" x 7" (406 mm x 178 mm) Trim Slates… natural quarried slates used on both the hip and ridge sections of the roof.• TruSlate® Trim Slates arrive at the job in crates containing enough trim slates to

cover approximately 100 lineal feet (30.48 lm) of hip and ridge.• There are approximately 250 TruSlate® Trim Slates per 100 lineal feet (30.48 lm).

UnderBlock™ UV & Moisture Barrier… used as an interlayment between the slates, TruGrip™ Hangers, and roof deck. UnderBlock™ UV & Moisture Barrier provides an extra layer of protection for your roof. It’s made from ultra-tough high-density polyethylene. Each roll of UnderBlock™ UV & Moisture Barrier contains enough material to cover approximately 250 square feet (2.5 squares) (23.23 m2).

TruGrip™ Battens and Hangers… GAF’s exclusive TruGrip™ Battens and Hangers for installing the TruSlate® Premium Roofing System.

hammer SafetY1. Eye protection must be worn.2. Strike nails squarely… to reduce the chance of nails flying back at you.3. Discard damaged hammers… with cracked handles or heads.4. Hammer heads can shatter…

• Never strike a hardened steel hammer against another hardened steel object. • Never strike hammer face against hammer face.

cutting tool SafetY1. Always cut away from your body… to reduce the chance of cutting yourself.2. Dull blades are dangerous blades… dull blades have to be forced, increasing the chance

of slipping. Make sure to replace blades frequently.3. Retract blade on hand-operated cutters when storing… to reduce the chance of

accidental cuts.

material handling Should Be done eaSilY and SafelY...1. Use your legs… when lifting heavy materials, always use your legs – not your back. Lifting

with your back can cause back injuries.2. Do not overload yourself… carrying too much fatigues the body and is unsafe on ladders

and rooftops.3. Boom trucks are dangerous… • These trucks can easily strike power lines. • Anyone nearby can be injured or killed by the electric current. • Keep yourself and your crew away from boom trucks delivering material.4. Store material close to the roof… the closer to the roof, the less time and energy wasted

retrieving material.

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• TruGrip™ Battens are 4 foot (1 .22 m) stainless steel strips, preassembled with standard TruGrip™ Hangers at intervals of 6" (152 mm).

• TruGrip™ Hangers are spring-tempered stainless steel and are installed in the TruGrip™ Battens. Hangers are also available in standard/long lengths that can be used to install slate using a “staggered application method.“

• TruGrip™ Battens and Hangers come in packages with 75 batten strips with pre-installed hangers plus 20 extra hangers. Each package covers approximately 250 square feet (2.5 squares) (23.23 m2).

Lay-Straight™ Alignment Tape… is used as a guide for installing the TruGrip™ Battens on the roof. This tape contains markings that show the installer where each TruGrip™ Batten should be installed. Lay-Straight™ Alignment Tape is started at the eave and laid out vertically toward the peak of the roof. Each roll of Lay-Straight™ Alignment Tape is approximately 180 lineal feet (54.9 lm) and covers approximately 600 square feet (6 squares) (55.74 m2). Lay-Straight™ Alignment Tape comes with 3 rolls per package.

TruSlate® Ridge Vent… 4' (1 .22 m) hard plastic ridge vent installed at the ridge to provide proper attic ventilation in conjunction with adequate intake ventilation at the eaves/soffits. TruSlate® Ridge Vent is a non-baffled ridge vent with a Snow Guard™ Filter to provide excellent aesthetics while delivering maximum protection.- TruSlate® Ridge Vent is packaged 10 pieces per box, with enough material to cover

40 lineal feet (12.19 lm) of ridge.

TruSlate® Hip & Ridge Spacer… 1/2" x 8" x 48" (13 mm x 203 mm x 1 .22 m) corrugated plastic pieces used as a base for installing Trim Slates on the hips and ridges (when ridge ventilation is not used).• When TruSlate® Ridge Vent is used, the Hip & Ridge Spacer is NOT used to install

Trim Slates at the ridge.• Each pack of TruSlate® Hip & Ridge Spacer covers approximately 100 lineal feet

(30.48 lm) of hip and ridge.

TruSlate® Stainless Steel Nails… 1 1/4" (32 mm), .120 Stainless Steel Annular Ring Shank Coil Roofing Nails used to install TruGrip™ Battens and Hangers. These stainless steel nails work with most major brand-name roofing pneumatic nail guns.• Each box of TruSlate® Stainless Steel Nails covers approximately 1,500 square feet

(15 squares) (139.4 m2).

16 oz (454 g) copper flaShingS With copper faStenerS are recommended for the truSlate® premium roofing SYStem.

flaShing materialSDrip Edge… “D”-style copper edge metal used at the eave portion of the roof. 16 oz. (454 g) copper material should be used.

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4

Rake Or Gable End Metal… 16 oz. (454 g) copper edge metal with special vertical lip used at the rake or gable end of the roof.

Valley Metal… 24" (610 mm) “W” style valley metal, with 1" (25 mm) splash diverter, used to flash the valley areas of the roof.• Valley metal should be: 16 oz. (454 g) copper.

Wall and Counterflashing… metals used to flash wall to roof junctions. 16 oz (454 g) copper should be used for all wall and counterflashings.

Chimney Flashing... metals used to flash chimney to roof junctions. 16 oz. (454 g) copper should be used for all chimney flashing areas.

do not uSe galvanized flaShingS With the truSlate® premium roofing SYStem. thiS can cauSe corroSion and Staining.Substitutions for Flashing Metals Include: • 24 gauge [.024 inch-(.61 mm)] thick stainless steel with stainless steel fasteners. • 16 ounce (454 g) [.026 inch (.66 mm)] thick lead-coated copper with stainless steel fasteners. • 4 lb. (1 .81kg) [.062 inch (1.57 mm)] thick lead with stainless steel fasteners. • .016 inch (.41 mm) thick copper-clad stainless steel with stainless steel fasteners. Contact GAF Technical Support at 1-800-766-3411 for further information on compatible flashing materials.

Fasteners... are used to secure TruSlate® Trim Slates, TruSlate® Hip & Ridge Spacer, and TruSlate® Ridge Vent.• Minimum 2" (51mm) stainless steel nails, 2" (51mm) #8 coated decking screws, or

2" (51mm) copper slating nails should be used to secure Trim Slates at the hip and ridge (when not using ridge ventilation).

• When installing Trim Slates over the TruSlate® Ridge Vent, use minimum 2 1/2" (64 mm) stainless steel nails, 2 1/2" (64 mm) #8 coated decking screws, or 2 1/2" (64 mm) copper slating nails for optimum holding power.

• Minimum 1 3/4" (44 mm) roofing nails should be used to install the TruSlate® Ridge Vent.• Minimum 1 1/2" (38 mm) roofing nails should be used to install the TruSlate® Hip &

Ridge Spacer.• Minimum 1 1/4" (32 mm) copper slating nails for fastening copper flashing.

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5

Leak Barriers… Self adhering underlayments, such as GAF WeatherWatch® Leak Barrier and StormGuard® Leak Barrier, are used to protect vulnerable areas of the roof.• All leak barriers used with the TruSlate® Premium Roofing System must meet ASTM

D1970 standards.• Vulnerable areas that leak barriers protect include: • Eaves • Chimneys • Rakes • Hips and Ridges • Valleys • Penetrations (vents, soil pipes, skylights, etc.)

Roof Deck Protection… commonly known as “underlayment”, such as GAF Deck-Armor™ Premium Breathable Roof Deck Protection, provides an added layer of protection for the roof deck under the primary roof covering.• Roof deck protection is used on the remaining area of the roof deck where leak barriers

are not installed.• When using synthetic roof deck protection products… they must meet or exceed the

physical properties of ASTM D226 and ASTM D4869.• When using roofing felts… minimum (2) layers of ASTM D226 Type II (#30) asphalt

saturated roofing felt are required.• On slopes 4:12 - 5:12, where a leak barrier must be used on the full deck, use a product

meeting ASTM D1970, such as GAF StormGuard® Leak Barrier.

important: To achieve UL Class A fire rating with TruSlate®, install GAF’s VersaShield® Fire-Resistant Roof Deck Protection on top of full-deck leak barrier coverage (4:12 - 5:12 roof slopes) or on top of fastened roof deck protection (roof slopes above 5:12). Caulk/Sealant… use only high-quality, exterior-grade sealant. Use on various finishing elements of the TruSlate® Premium Roofing System, such as the joints of Trim Slates installed at the hip and ridge.

Decking… is the “foundation” for the roofing system. It is the substrate to which all roofing materials are fastened. Unlike “traditional” slate roofing systems, the TruSlate® Premium Roofing System can be installed on decking systems that are commonly used for standard asphaltic shingles.

GAF allows the following decking materials for use with its TruSlate® Premium Roofing System:• Minimum 15/32" (13 mm) APA - The Engineered Wood Association–rated exterior-

grade plywood.• Minimum 7/16" (11 mm) APA - The Engineered Wood Association–rated exterior-grade

oriented strandboard, commonly known as “OSB.”• Minimum 1" (25 mm) thick by 6" (152 mm) wide boards.

What toolS do i need to inStall the gaf truSlate® premium roofing SYStem?Hand Tools… • Hammer • Tin Snips • Utility Knife • Chalk Line • Tape Measure Power Tools… • 1/8" (3 mm) masonry drill bits

• Drill • Pneumatic nail gun for roofing • Air compressor and hose

• Extension cords • Tile saw (high-speed wet-type saw or power saw with carbide tip blade)

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6

Specialty Tools… • Slate cutter (optional) • Forklift or conveyor lift

Safety Equipment… • Eye protection (adequate safety glasses) • Hand protection (sturdy work gloves) • Safety belts and harness • Ropes and other necessary fall protection • Hard hats • Scaffolding and/or ladders

SafetY iS the #1 prioritY… for the protection of YourSelf and Your creW. alWaYS folloW all SafetY tipS included in thiS inStallation guide, and alWaYS folloW oSha requirementS in Your area.

hoW much material do i need… for mY roof to inStall the truSlate® premium roofing SYStem?

Basic Estimating… to determine approximate product needs.

important: The measurements below do NOT include an allowance for waste. ADD 10% TO YOUR CALCULATIONS TO ENSURE THAT YOU HAVE ENOUGH OF EACH MATERIAL TO FINISH THE JOB.

Step 1... Measure the Area of Each Roof Plane… and add them together to determine the total area. This is a good starting point to determine how much material is needed for the job.

Step 2... Measure the Length Of Hip and Ridge Areas… and add them together to determine the lineal footage of TruSlate® Trim Slates, Hip & Ridge Spacer, and Ridge Vent required.

Step 3... Purchase TruSlate® Roofing System Products…• TruSlate® Premium Roofing System: • TruSlate® 12" x 12" (305 mm x 305 mm) Field Slates… approximately 500 square

feet (5 squares) (46.45 m2) coverage in each crate.

• TruSlate® System Components: – UnderBlock™ UV & Moisture Barrier (2.5 squares (23.23 m2) coverage) per roll – TruGrip™ Battens & Hangers (2.5 squares (23.23 m2) coverage) per box – Lay-Straight™ Alignment Tape (6.0 squares) (55.74 m2) per roll, 3 rolls per package.

• TruSlate® Trim Slates Kit: – TruSlate® 16" x 7" (406 mm x 178 mm) Trim Slates... approximately 100 lin-

eal feet (30.48 lm) of coverage in each crate. Each crate contains enough Trim Slates and Hip & Ridge Spacer to install 100 lineal feet (30.48 lm) of Trim Slates on the hip and ridge.

Step 2:

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7

Step 4... Purchase Additional Materials…• TruSlate® Ridge Vent: • Each box of TruSlate® Ridge Vent covers approximately 40 lineal feet (12.19 lm)

of ridge.

• Leak Barriers… such as GAF WeatherWatch® or StormGuard® Leak Barriers. These products generally come in 150 or 200 square feet (1 .5 or 2 squares) (13.94 or 18.58 m2) coverage sizes.

- Used on vulnerable areas of the roof such as eaves, valleys, hips and ridges, rake or gable edges, roof protrusions, and chimneys, etc.

- See Page 8, Step 4, for specific details on installing leak barriers.

• Roof Deck Protection… such as GAF Deck-Armor™ Premium Breathable Roof Deck Protection. Deck-Armor™ covers approx. 1,000 square feet (10 squares) (92.9 m2).

- Roof deck protection is used on the remaining area of the roof deck where leak barriers are not installed.

- See Page 8, Step 4, for specific details on installing roof deck protection.

• Flashing Materials… for flashing valleys, eaves, rakes, chimneys, and to use as counter- flashing, etc.

- Examine the roof surface for these areas to ensure that you purchase the right amount of materials needed to complete the job.

- Only copper or other GAF-approved metals should be used.

• Fasteners… such as GAF’s 1 1/4" (32 mm) Stainless Steel Ring Shank Coil Nails for installing the TruGrip™ Battens & Hangers. Each box of stainless steel coil nails covers approximately 1,500 square feet (15 squares) (139 m2).

- Purchase fasteners for Trim Slates. Use 2" (51 mm) stainless steel nails, 2" (51mm) #8 coated decking screws, or 2" (51 mm) copper slating nails for Trim Slates on the hips and ridges where ridge ventilation is not installed.

- When installing Trim Slates with the TruSlate® Ridge Vent, use 2 1/2" (64 mm) fasteners, as described above, for maximum holding power on the ridge.

- Purchase minimum 1 1/4" (32 mm) copper slating nails for fastening copper flashings.

• Don’t Forget… any other specific materials or tools that may be required on your specific project.

prepare the roof deckAlways inspect existing roof sheathing… for structural integrity, wet areas, and uneven areas or areas with holes. Properly fix any such areas as necessary.

Locate and Properly Fix… any penetrations on the roof deck that can damage or affect the performance of the roof deck protection, leak barriers, or roofing system. All nails or fasteners should be driven flush with the deck.

The Roof Deck… should always be dry, well-seasoned, and consist of one of the following:• Minimum 15/32" (12 mm) APA - The Engineered Wood Association-rated exterior-grade

plywood.• Minimum 7/16" (11 mm) APA - The Engineered Wood Association-rated exterior-grade

oriented strandboard, commonly known as “OSB.”• Minimum 1" (25 mm) thick by 6" (152 mm) wide boards.

Step 3:

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8

When Installing Roof Decking… over spaced sheathing, the plywood or OSB sheathing must be installed so that joints of the plywood or OSB are located on top of the existing pieces of spaced sheathing below. This will ensure that the plywood or OSB is properly supported by the spaced sheathing.• Sheathing Nails… should be installed 6" (152 mm) on center on the perimeter and

12" (305 mm) on center in the field.

For more information on decking materials and applications, contact GAF Technical Support at 1-800-766-3411.

inStall roof deck protection & leak BarrierSWhen installing the GAF TruSlate® Premium Roofing System, there are two options for installing Roof Deck Protection.1. Recommended Method for Slopes Over 5:12. . . Use mechanically attached roof deck

protection, such as GAF Deck-Armor™ Premium Breathable Roof Deck Protection, along with a self-adhered leak barrier at the vulnerable areas of the roof. These include GAF WeatherWatch® or StormGuard® Leak Barriers.

2. Required on Roof Slopes 4:12 Up to and Including 5:12. . . Use a self-adhered leak barrier, such as StormGuard® Leak Barrier, to cover the full deck.*

Never install the GAF TruSlate® Premium Roofing System on slopes less than 4:12.

* Proper attic ventilation is critical when covering the full deck with a leak barrier. Follow all recommendations in GAF’s Steep-Slope Technical Point, Full-Deck Coverage Of Leak Bar-riers (TAB-R-2011-111) when using full-deck coverage of StormGuard® or WeatherWatch® Leak Barriers.

Step 4:

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9

• To install roof deck protection and leak barriers, follow published application instructions on products packaging or at gaf.com.

roof SlopeS greater than 5:12 …Self-Adhered Leak Barriers with Mechanically Attached Roof Deck Protection

Apply Self-Adhering Leak Barriers… on roof slopes above 5:12, such as GAF WeatherWatch® or StormGuard® Leak Barriers, in valleys, eaves, hips and ridges, gable/rake edges, around roof protrusions, and at all other vulnerable areas of the roof.• At the Eaves…

• Install Drip Edge Metal… at the eave edge of the roof (16oz. [454 g] copper). • Fasten Drip Edge Metal... every 8" – 10" (203 mm – 254 mm) on center, 1" (25 mm) from the edge of the metal with 11/4" (32 mm) copper slating nails.

• Install Leak Barrier over the Deck… extending from the eave edge to a point at least 24" (610 mm) beyond the inside “warm” wall of the living space below.

• Leak Barrier… should extend over the drip edge metal at the eave edge.• Consult Local Building Codes… to find specific requirements for installing leak

barrier at the eave. Remember, codes may vary from region to region.

(.913’

6" (152 mm)End Lap

3" (76 mm)Side Lap

Along rake, place drip edge on top of Deck-Armor™Roof Deck Protection

Along eaves, put Deck-Armor™ Roof Deck Protection on top of metal drip edge

Deck (Use WeatherWatch® or StormGuard® Leak Barrier If Required)

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10

• In the Valley…1. Install Self-Adhering Leak Barrier… in the valley, making sure the sheet is centered in

the valley area.

2. Install Mechanically Attached Roof Deck Protection… at the eave area of the valley over the leak barrier.

3. Install Valley Metal… over self-adhered leak barrier and mechanically attached roof deck protection using “W”-style 16 oz. (454 g) copper valley flashing.

• Valley flashing should have 1" (25 mm) splash diverter. • Fasten… valley flashing with 1 1/4" (32 mm) copper slating nails at 16" (406 mm)

on center, 1" (25 mm) in from the edge of valley flashing.

""

Standard Valley Metal Detail

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11

Alternate Valley Metal Detail #1

Alternate Valley Metal Detail #2

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12

4. Apply Additional Layer of Leak Barrier… over valley metal, leaving 3" (76 mm) from center line of valley uncovered.

• Cover valley flashing… a minimum of 11" (279 mm) on each side with leak barrier. • Cover all nails… with a minimum of 3" (76 mm) of leak barrier.

• At the Rake Edge…1. Install Mechanically Attached Roof Deck Protection… 6"– 8" (152 – 203 mm) short of

the rake edge, leaving the deck uncovered.

2. Install Self-Adhered Leak Barrier… along the entire rake edge of the roof, overlapping the leak barrier onto the adjacent roof deck protection.

• This will help to protect against weather infiltration at the rake edge.

3. Fasten Rake Edge Metal… over leak barrier 8" – 10" (203 mm – 254 mm) on center, 1" (25 mm) from the edge of the metal with 1 1/4" (32 mm) copper slating nails. • Use 16 oz. (454 g) copper edge metal for rake edge metal.

4. Cover Nail Heads… on the gable/rake edge metal with 10" (254 mm) wide strips of leak barrier.

• Leave 1 1/2" (38 mm) wide of rake edge metal uncovered by leak barrier to form a gutter.

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important: Standard profile rake edge metal (copper or other TruSlate®-approved metals) can only be used when installing vertical battens at the rake edge. See Page 27 for further details.

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13

"

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"

important: Always make sure that self-adhering leak barrier extends a minimum of 6" (152 mm) beyond metal over roof deck protection and all other flashings/penetrations.

• At the Ridge… 1. Install… an 18" (457 mm) wide piece of self-adhered leak barrier at the ridge.

2. Extend… the leak barrier down 18" (457 mm) from the roof peak or ridge vent slot towards the roof deck, overlapping the roof deck protection for maximum protection against weather infiltration.

3. If Ridge Ventilation Is Used… make sure the leak barrier does not cover the ridge slot.

Mechanically Attached Roof Deck Protection… such as GAF Deck-Armor™ Premium Breathable Roof Deck Protection must be installed on the remainder of the roof surface not covered by self-adhered leak barrier: • With a minimum 3" (76 mm) overlap and minimum 6" (152 mm) end lap. In wet or harsh

winter climates, use a minimum 6" (152 mm) overlap and a 12" (305 mm) end lap.• Fasten all side and end laps… 12" (305 mm) on center. In high wind areas, fasten

6" (152 mm) on center.• Fasten in the field… with 2 staggered rows 24" (610 mm) on center. In high wind areas,

fasten 12" (305 mm) on center.• Use only cap nails or cap staples to fasten Deck-Armor™ Roof Deck Protection. Do NOT

use nails or staples without caps.• For further information…. on installing Deck-Armor™ Roof Deck Protection or other roof

deck protection products, consult the published application instructions on product packaging or at gaf.com.

important: Deck-Armor™ Premium Breathable Roof Deck Protection is water resistant; it is NOT waterproof. It should NOT be utilized as a temporary roof to protect property or possessions.

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14

for roof SlopeS at leaSt 4:12 up to and including 5:12…Self-Adhered Leak Barriers… Full-Deck Coverage

Never Install… the TruSlate® Premium Roofing System on roof slopes less than 4:12.

Full Deck Coverage… of a self-adhering leak barrier is required for roof slopes equaling 4:12 up to and including 5:12.

• When used in full-deck coverage, a leak barrier such as GAF’s StormGuard® Leak Barrier will help to prevent possible weather infiltration on these types of low-slope roofs.

• Do not use mechanically attached roof deck protection… since the leak barrier will be applied over the entire surface of the roof deck.

• Since leak barriers used on full-deck coverage act as a vapor barrier, proper attic ventilation is critical.

• Consult local building codes for requirements on ventilation.

inStall truSlate® ridge ventGAF Recommends… following the FHA/HUD requirements for proper ventilation. However, you should always comply with local building codes. Review your local building codes for other ventilation requirements.

FHA/HUD Guidelines Require:• Open Soffits and Open Ridge Vents… the FHA/HUD requirements for this type of

ventilation are based on air flow through both open soffits and ridges.• A Balanced System… equal airflow through the soffit and through the ridge.

18" (457 mm) Leak Barrier

Step 5:

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15

(22 mm)(22 mm)

" (44 mm)

" "

important conSiderationS…• Install the TruSlate® Ridge Vent before installing the Field Slates to ensure that a full

course of slate can be installed adjacent to the Ridge Vent and for proper roof layout.• Do not install the TruSlate® Ridge Vent along hip areas (down-slope hip rafters or hip

legs)… since it can leak if installed on hips.• For a uniform appearance, install the TruSlate® Ridge Vent over the entire length of the

ridge. The vent MUST extend past the slot opening by at least 6" (152 mm).• For applications with hip and ridge intersections, terminate the TruSlate® Ridge Vent

at least 6" (152 mm) short of the intersection.• When venting vaulted or cathedral ceilings, each joist/rafter must be ventilated on

both ends and have at least a 2" (51 mm) clearance.

Cutting the Ridge Slot Opening…1. Calculate the Total Length of TruSlate® Ridge Vent Needed… to determine the

necessary slot opening required.2. Roofs Without a Ridge Board… cut a 7/8" (22 mm) opening along the ridge on

each side.3. Roofs With a Ridge Board… cut a 1 5/8" (41 mm) opening along the ridge on

each side.

Note: The total maximum slot opening is 3 1/4" (83 mm) wide.

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16

4. Mark-off and Cut the Slot Opening… making sure the slot is cut straight and consistent. • Avoid cutting through rafters when cutting the ridge slot opening.5. Stop… cutting the ridge slot opening at least 6" (152 mm) from end walls. • The opening must stop at least 12" (305 mm) from hip and ridge intersections

or chimneys.

6. Where Short Ridges (dormers, ridge intersections) are Present… mark and cut the slot

and ensure that the end of the opening stops at least 12" (305 mm) from the ridge inter-section.

At hip-to-ridge intersections, make sure the ridge slot opening is kept back at least 12" (305 mm) and the Ridge Vent is kept back at least 6" (152 mm) from the hip-to-ridge intersection. • Hip & Ridge Spacers running up the hips must continue up to the ridge. • Ridge Trim Slates must cover hip Trim Slates for proper weather protection.

(152 mm) (305 mm) (305 mm) (152 mm)

(152 mm) (152 mm)

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17

Vent “peaked” and centered over ridge slot

Ridge Slot

Center line

Vent o�-centerover ridge slot

Ridge Slot

Center line

(152 mm)

(152 mm) (152 mm)

(305 mm)

7. Install an 18" (457 mm) Piece of Self-Adhered Leak Barrier… such as GAF WeatherWatch® or StormGuard® Leak Barriers from the edge of the ridge slot opening down towards the roof deck.

• This will help to ensure maximum protection against weather infiltration.

Install the Ridge Vent…1. Starting At One Gable End… place and center the TruSlate® Ridge Vent over the ridge

slot. Rest the vent firmly against the roof surface. • The ridge vent must always be “peaked” and centered over the ridge slot.

The top panel on each side of the Ridge Vent must be parallel to the roof deck below to avoid problems when installing Trim Slates.

2. Fasten the Vent Section… using roofing nails that are 1 3/4" (44 mm) or longer. • Attach the vent section using the nail line inscribed at the top of the vent as

a guide. • Nails must always penetrate through plywood decks at least 3/4" (19 mm) into

wood planks. • Use 3" (76 mm) ring shank nails for maximum uplift resistance.

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18

3. Apply the Subsequent Ridge Vent Sections… along the length of the ridge. • For cold weather applications… leave 1/8" (3 mm) gap between each vent

section to allow for expansion and contraction.

4. Install a 4" (102 mm) Wide Strip of Self-Adhered Underlayment… such as WeatherWatch® or StormGuard® Leak Barrier, over the seams between each Ridge Vent section.

• This will ensure maximum protection against weather infiltration.

important: To ensure maximum protection against weather infiltration… use exterior-grade silicone caulk to cover all exposed nail heads on the vent.

5. Install the Final Section of TruSlate® Ridge Vent… at the end of the ridge, with the finished premolded end cap installed to the outside edge to prevent weather infiltration.

Install Top Course of Field Slates…1. The Underblock™ UV & Moisture Barrier… will extend 3/4" (19 mm) from the top course

of slates.2. Tuck 3/4" (19 mm) Portion… of UnderBlock™ UV & Moisture Barrier securely under the

TruSlate® Ridge Vent to ensure weathertight protection at the juncture of the slates and Ridge Vent.

3. Butt The Top Course of Slate… up firmly against the Ridge Vent. • There should be no space between the top of the slates and the Ridge Vent.

important: It may be necessary to adjust the lower courses of Battens and Hangers 1/4" (6 mm) up or down as necessary in order to install a full course of slates adjacent to the Ridge Vent.

Install Trim Slates Over Ridge Vent… 1. Install Trim Slates… directly to the vent, using minimum 2 1/2" (64 mm) stainless steel

nails, copper slating nails, or coated decking screws. • GAF TruSlate® Trim Slates come with prepunched holes for easy installation.

WeatherWatch® or StormGuard® Leak Barrier

18"

18"

(457mm)

(457mm)

Deck-Armor™Roof Deck Protection

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19

10"(257 mm)

Step 6:

TruSlate® Trim Slate

Top course of TruSlate® Field Slate

• Note: Nails must be of sufficient length to penetrate through plywood decks or

OSB and at least 3/4" (19 mm) into wood planks. • Use 3" (76 mm) ring shank nails for increased uplift resistance. 2. The Edge of Each Trim Slate… must meet the top of the ridge with one piece slightly

overlapping the other to form a clean, water-resistant joint.3. Each Succeeding Trim Slate… should overlap the previous piece by 6" (152 mm),

resulting in a finished exposure of 10" (254 mm). • Do NOT overdrive the fasteners on the Trim Slates. The Trim Slates should be

able to “wiggle” slightly.4. If Desired… apply a weatherproof caulk of a color matching the slate to the butt joint

of each Trim Slate.

inStall ridge trim SlateS(For Installations Without Ridge Vents)1. Install TruSlate® Hip & Ridge Spacers… evenly over the ridge.2. Fasten… The Hip & Ridge Spacer at 24" (610 mm) on center along each side of the

ridge with 1 1/2" (38 mm) roofing nails or 1 1/2" (38 mm) coated decking screws.3. Place a Piece of UnderBlock™ UV & Moisture Barrier. . . over the top of the Hip &

Ridge Spacers. • Center the UnderBlock™ UV & Moisture Barrier over the Hip & Ridge Spacers. • Overlap end laps of the UnderBlock™ UV & Moisture Barrier by at least

12" (305 mm). • Use 10'–12' (3.05 – 3.66 m) lengths of UnderBlock™ UV & Moisture Barrier for

more manageable installations and to avoid issues with expansion and contraction after installation.

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4. Prepare to Install Top Course Of Field Slates… adjacent to the Hip & Ridge Spacer at the ridge.

• Apply TruGrip™ Battens and Hangers for the top course of Field Slates. • Lay 10'–12' (3.05 – 3.66 m) lengths of UnderBlock™ UV & Moisture Barrier along

the row of Hangers, overlapping side laps at least 12" (305 mm). • Tuck the piece of UnderBlock™ UV & Moisture Barrier previously installed in the top

row of Hangers under the UnderBlock™ UV & Moisture Barrier that was installed over the Hip & Ridge Spacer.

• The UnderBlock™ UV & Moisture Barrier used on top of the Hip & Ridge Spacer should always overlap the top course of slate by at least 2" (51 mm).

5. Lay Top Course… of slate by placing bottom edge of each slate into top row of TruGrip™ Hangers.

• The top edge of the slates should be no more than 1" (25 mm) from the Hip & Ridge Spacer.

6. Adjust Hangers… as needed, using the spring-loaded TruGrip™ Battens & Hangers. • TruGrip™ Hangers are pre-installed at 6" (152 mm) on center. Evenly space the

Hangers under each slate. • On smaller pieces of slate, ensure that two Hangers are supporting each

piece evenly. • Each Hanger should be 3" (76 mm) from the edge of each full piece of slate. • Never install pieces of slate less than 4" (102 mm) in width and 5" (127 mm)

in height.

important: If the measurement would otherwise cause a piece of slate to be used that is less than 4" (102 mm) wide, the adjacent pieces of slate must be cut back so that no piece of slate is less than 4" (102 mm) wide and 5" (127 mm) in height. • The cut edges should be placed side by side so that these edges blend in and are

not distinguishable.

7. Install Trim Slates… on top of the Hip & Ridge Spacer using two pre-drilled holes in the Trim Slates.

8. Fasten the Trim Slates… using 2" (51mm) stainless steel nails, 2" (51mm) #8 coated deck-ing screws, or 2" (51mm) copper slating nails into the Hip & Ridge Spacer below.

9. The Edge of Each Trim Slate… must meet at the top of the ridge and one piece should slightly overlap the other, so a clean weather-resistant joint is formed.

• If desired, apply an exterior weatherproof caulk matching the slate at the butt joint between Trim Slates.

10. Each Succeeding Trim Slate… should overlap the previous piece by 6" (152 mm), resulting in a finished exposure of 10" (254 mm).

• Each Trim Slate should overlap the top course of Field Slate by a minimum of 2" (51mm).

• Do NOT overdrive the fasteners on the Trim Slates. The Trim Slates should be able to “wiggle” slightly.

• Carefully trim any visible UnderBlock™ UV & Moisture Barrier with a utility knife.

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Step 7:

TruSlate® Non-Vented Ridge

laY out the roofLay-Straight™ Alignment Tape… is part of the TruSlate® Premium Roofing System.• Self-Adhesive… green tape that shows eave alignment and TruGrip™ Batten placement.• Provides… a quick-and-easy way to lay out each course of TruSlate® slates on the roof.

Using Alignment Tape… 1 . Align the Tape… at the eave, using the eave edge mark on the tape. 2. Apply the Tape… all the way up the roof. 3. Repeat… as needed to reach the Ridge Spacer or Ridge Vent. 4. Chalk a Line… on each Batten marker, horizontally across the roof. 5. Install the Battens… from the top of the roof, working down in

4-course increments.

important: Do not install all the Battens on the roof at once. Instead, install only 4 courses of Battens at a time. This will help to prevent any potential mistakes in laying out the roof.

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inStall truSlate® field Slategeneral conSiderationS… The TruSlate® Premium Roofing System is installed from the top of the roof down to the bottom of the roof. TruGrip™ Battens and Hangers are installed in 4-course sections starting at the top of the roof. Within the 4-course section, slates are slid into place working from bottom to top. After all the slate has been installed within the initial 4-course section, another 4-course section of TruGrip™ Battens and Hangers are installed below. This process continues until the installer reaches the bottom of the roof.

important: Since the TruSlate® Premium Roofing System is installed from the top of the roof down, slide guards (toe boards) can be removed as the roof is installed. Before the UnderBlock™ UV & Moisture Barrier and the TruSlate® Premium Roofing System are installed, any fastener holes in the roof deck protection or leak barrier must be sealed with a dab of asphalt plastic roof cement. Any larger holes or tears should be repaired by inserting a new piece of roof deck protection or leak barrier over the damaged area. The repair piece should be lapped into the system so that any water running down the roof would run over the lap and not under the repair piece.

important note! Always pull and mix slates from ALL crates on the job site BEFORE installation to avoid patching or patterning on the roof. Be sure to cull any slates with severe surface defects of white surface efflorescence (also referred to as “milk spotting”) before installation on the roof.

Installing TruGrip™ Battens & Hangers…1. Starting at the Fourth Chalk Line Down… from the ridge, install 4 courses of TruGrip™

Battens on the roof. Battens should lie horizontally at a 90° angle to the Lay-Straight™ Alignment Tape. Install each Batten course approx. 10" (254 mm) apart vertically (bottom edge of Batten to bottom edge of Batten). *Required for maximum wind warranties

2. Fasten Each Batten… with 1 1/4" (32 mm) stainless steel annular ring shank coil nails at the center of each Hanger (approx. every 6" [152 mm]).

• Hangers should line up vertically from course to course. Do not off-set the Hangers when installing subsequent courses.

• Battens should be fastened end to end. • Always keep TruGrip™ Battens 1/2" (13 mm) away from Hip & Ridge Spacers or

rake edge metals.

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Step 8:

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HANGER

TRUSLATE® 1 14" (32 mm) STAINLESSSTEEL ANNULAR RING SHANK COIL NAILS LOCKING

HANGERS IN BATTEN SLATS

BATTEN

common inStallation miStake… Installing TruGrip™ Battens on the whole roof at once. GAF recommends that only 4 courses of TruGrip™ Battens and Hangers be installed at a time to ensure that Hangers are aligned vertically from course to course.

3. TruGrip™ Hangers… can be relocated on the TruGrip™ Batten, as needed, by simply squeezing the top wires of the Hangers together and releasing. Hangers should “snap” securely into place.

general tip: TruGrip™ Battens can be cut, if needed, with tin snips.

For Maximum Wind Resistance* and in areas that receive more than 2" (51 mm) of snow/year… Use min. 1 1/4" (32 mm) stainless steel annular ring shank nails with 3/8" (10 mm) head diameter, spaced max. 6" (152 mm) on center through the batten, to fasten the TruGrip™ Batten to the deck. Locate the nail in the Batten, as shown, so that the nail head overlaps the TruGrip™ Hanger against the Batten slot. This will trap the wire in the Batten slot to provide maximum resistance to high wind and snow loads. *Required for maximum wind warranties

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Installing UnderBlock™ UV & Moisture Barrier…1. Cut… a piece of UnderBlock™ UV & Moisture Barrier and place it along the bottom

course of TruGrip™ Battens using Hangers to support the bottom edge of the UnderBlock™ UV & Moisture Barrier. Use 10'–12' (3.05 – 3.66 m) sections of UnderBlock™ UV & Moisture Barrier for easier installations and to avoid issues with expansion and contraction after installation.

• UnderBlock™ UV & Moisture Barrier should have side laps of at least 12" (305 mm).

common inStallation miStake… Installing UnderBlock™ UV & Moisture Barrier in lengths longer than 12' (3.66 m). UnderBlock™ UV & Moisture Barrier can expand and contract with changes in temperature. Longer lengths of UnderBlock™ UV & Moisture Barrier are more susceptible to this expansion and contraction. Working with 10'–12' (3.05 – 3.66 m) lengths will help you avoid drastic expansion and contraction issues.2. Always Install UnderBlock™ UV & Moisture Barrier… “Dull” side up (“shiny” side down). Never nail through the UnderBlock™ UV & Moisture Barrier when installing Field Slates. Holes in the UnderBlock™ UV & Moisture Barrier could allow water to infiltrate the roofing system.Each section of 4-batten courses is referred to below as a “Work Section.”

important note! Field Slates must always be at least 4" (102 mm) wide and at least 5" (127 mm) tall.Installing Slates…1. Work Bottom to Top in Each Work Section… begin on the left side of the roof by

placing a full slate in the bottom course of the first work section. Install each slate over the UnderBlock™ UV & Moisture Barrier and into the TruGrip™ Hangers.

• At the rake edge, butt slates tightly against the vertical lip of the rake edge metal. • Working horizontally, proceed across the course, hanging the slates in the

TruGrip™ Hangers.2. Each Slate… should have a minimum of 2 Hangers supporting the top and bottom of

the slate.

3. Start the Second Course at the Left Side of the Roof . . . working bottom to top in each section with half a slate to ensure no vertical joints extend through more than one course. Continue working horizontally across the course, placing slates into the Hangers.

• Half slates must have at least 2 TruGrip™ Hangers supporting them. Otherwise, half slates may come loose and fall off the roof.

• Each Field Slate must have a TruGrip™ Hanger located 3" (76 mm) from each side of the slate.

• Field Slates should be built firmly together. There should be no space between slates.

general tip… Cut slates in half by using a high-speed wet-type saw, power saw with carbide tip blade, or guillotine-style slate cutter.

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4. Offset… the keyways or joints one half-slate from course to course to prevent vertical keyways or joints from lining up on adjacent vertical courses.

general tip… If needed, bend the end of each TruGrip™ Hanger with a pair of pliers so that it grips in the slate tightly. The TruGrip™ Hanger should resemble a “U” to hold the slate securely.

5. After Completing… the initial work section, install the next 4 courses of TruGrip™ Battens below.

6. Work Bottom to Top… on the new work section. Install UnderBlock™ UV & Moisture Barrier and TruSlate® Field Slates as described previously.

7. At The Top of Each Work Section… an “open” course will be created.

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Completing the “Open Course”…1. Install UnderBlock™ UV & Moisture Barrier… into the “open” course by slipping it under

the top course of slate. The bottom edge of the UnderBlock™ UV & Moisture Barrier will be held in place by Hangers.

2. Install Field Slates… into the “open” course by slipping the top edge under the first course until the bottom of the edge of the slate clears the Hangers below.

3. Pull or Push… the Field Slate downward slightly, until the Hangers support the bottom edge of the slate.

general tip: An 18" (457 mm) wide piece of UnderBlock™ UV & Moisture Barrier can be used as a “shoehorn” by inserting it first, allowing the slates to slide easily under the “shoehorn” into place. Remove the “shoehorn” and repeat as needed.

For Maximum Wind Resistance*… Be sure that the Field Slate does not overhang the eave edge. The bottom edge of the Field Slate should rest flush to the eave edge.

*Required for maximum wind warranties.

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Installing TruGrip™ Battens vertically, parallel to the rake or gable edge of the roof, is permitted to fasten rake edge slates (in lieu of using the standard TruSlate® rake metal with vertical lip). A vertical course of TruGrip™ Battens and Hangers will lock the rake edge slates in from the side. As always, the horizontal course of Battens and Hangers will lock the rake slates in from the bottom.

1. The Rake Edge is Prepared… in the standard TruSlate® manner – with roof deck protection, leak barrier, rake metal, and a 10" (254 mm) strip of leak barrier to seal rake metal fasteners.

2. Install Rake Metal… on top of the leak barrier. Unlike the standard TruSlate® rake metal profile, this rake metal must not have the 3/4" (19 mm) vertical lip or 1/4" (6.4 mm) hump. • The rake edge metal and fasteners must be of a TruSlate® System-approved metal

flashing material to avoid staining and corrosion.

(alternate method) inStalling SlateS at rake edge uSing vertical BattenS

3. Cover Rake Metal Fasteners… with a 10" (254 mm) strip of leak barrier. 4. Before Installing the Last Horizontal TruGrip™ Batten… in each course nearest the

rake edge, chalk a line 5" (127 mm) in from the rake edge of the roof. • The chalk line will run vertically up the roof, parallel to the rake edge. 5. Align TruGrip™ Battens Vertically… parallel to the chalk line, with the top edge of the Batten resting on the chalk line. 6. Fasten the Vertical Battens… with TruSlate® Stainless Steel Coil Nails. • Two Hangers from the vertical Batten and Hanger must support the side of each rake

edge slate.7. Proceed…with completing horizontal courses of Battens.

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inStalling hipS and valleYS Installing Trim Slates on the Hips… Trim Slates are installed in the hips from the bottom up.

1. Install… TruSlate® Hip & Ridge Spacers along the hip, working from bottom to top.

2. At Hip-to-Ridge Intersections… complete the ridge first, allowing for Trim Slates at the ridge to be installed over the Trim Slates at the hip.

• This will provide a proper tie-in.

note: An entire ridge of Trim Slate may need to be installed after one of the slopes is completed.

3. Fasten… The Hip & Ridge Spacer at 24" (610 mm) on center along each side of the hip with 1 1/2" (38 mm) roofing nails or 1 1/2" (38 mm) coated decking screws.

4. Place a Piece of UnderBlock™ UV & Moisture Barrier… over the top of the Hip & Ridge Spacers.

• Center the UnderBlock™ UV & Moisture Barrier over the Hip & Ridge Spacers. • Overlap end joints of the UnderBlock™ UV & Moisture Barrier by a minimum of 12"

(305 mm). • Work with 10'–12' (3.05 – 3.66 m) lengths of UnderBlock™ UV & Moisture

Barrier for more manageable installations and to avoid expansion and contraction issues after installation.

5. Attach Trim Slates… through two predrilled holes using 2" (51 mm) stainless steel nails, 2" (51 mm) #8 coated decking screws, or 2" (51 mm) copper slating nails directly into the Hip & Ridge Spacer. Do not overdrive the fasteners. Trim Slates should be able to “wiggle” slightly.

6. The Edge of Each Trim Slate… must meet at the top of the ridge and one piece should slightly overlap the other, so a clean weather-resistant joint is formed. Trim Slates should overlap the Field Slate by a minimum of 2" (51 mm).

• If desired, cover each fastener hole and butt joint between Trim Slates with an exterior-grade weatherproof caulk matching the color of the slate.

7. Subsequent Trim Slates… should overlap the previous Trim Slates by 6" (152 mm).

8. Carefully Trim… any visible UnderBlock™ UV & Moisture Barrier with a utility knife.

Installing Field Slates at the Hip…inStallation tip: Field Slates can be applied from the middle of the field to the hip. Depending on the roof layout, it may be necessary to begin roofing from the hip out towards the field. This can help avoid installing slate pieces that are less than the minimum 4" (102 mm).

1. Cut Field Slates. . . are required for hip applications. Cut adjacent Field Slates as necessary to avoid installing slates smaller than the minimum 4" (102 mm).

2. Start the Field Slate . . . on one roof slope adjacent to the hip BEFORE installing the Trim Slate. Then complete the Field Slate on the opposite roof slope.

• This will eliminate the need to “shoehorn” the Field Slate underneath Trim Slate on both roof slopes.

Step 9:

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29

3. Attach Field Slates… into the hip using one of the following methods: a. Drill a hole in the slate and fasten with the same fasteners used to install

Trim Slates. b. Drill a hole and use copper wire to fasten it to the adjacent slate.

Installing Valleys with TruSlate®…Field Slates can be installed toward or away from the valley, depending on the roof layout. It may be easier, in most cases, to begin in the valley and work out to the hip or rake areas of the roof. This will allow you to avoid installing small pieces of the Field Slate in the valleys.

Closed Valleys…1. Fit Field Slates… in the space adjacent to valley center line.2. Mark and Cut… Field Slate to fit, using cutting tools described previously.3. Attach Field Slates… at the valley using one of the following methods: a. Drill a hole in the slate and fasten with the same fasteners used to install

Trim Slates. b. Drill a hole and use copper wire to fasten it to the adjacent slate. c. Lock the Field Slates against the center “ridge” of the valley flashing.

See detail drawing on Page 30.

important: Two Hangers must always be used to support each piece of slate installed into the valley. Closed valleys can also be installed using vertical Battens. See pages 30 and 31 for more information on installing valley slates with vertical Battens. general tip: When installing slates into the valley, it may be necessary to cut the adjacent slates to avoid installing slates smaller than the 4" (102 mm) minimum.

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30

all open valleYS (alSo alloWed on cloSed valleYS) inStall SlateS in the valleY uSing vertical BattenS… 1. Prepare the Valley… as previously described with “W”-style metal flashings.2. Before Hanging the Last Horizontal Batten… chalk a line parallel to the valley center

line at least 3" (76 mm) (open valleys) or 1" (25 mm) (closed valleys) out from the valley center line. The chalk line will mark where the Field Slates should be cut to form the valley.

3. Measure 5" (127 mm) Out on to the Roof Plane… (parallel to the valley center line) from the previously chalked line and chalk a second line.

4. Apply a Row of Battens Vertically… with the top of the Batten on the second chalk line. The Hangers on the vertical Batten should extend into the valley to the first chalk line.

5. Continue Installing the Horizontal Field Battens… during the installation of the slope, extending them over the vertical valley Battens. They should be just short of the first chalked line. There must be 2 Hangers, on the bottom and sides of the slates.

important: Always ensure that both the side and bottom edges of valley slates are supported properly to prevent slates from becoming loose or dislodged.

Closed Valleys

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