MOBILE HOME TRAINING Mobile Home Roof Retrofit€¦ · MOBILE HOME TRAINING Mobile Home Roof Retrofit. 1 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED ... • The cost-effectiveness

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MOBILE HOME TRAINING

Mobile Home Roof Retrofit

1 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.govWEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010

Learning ObjectivesMOBILE HOME ROOF RETROFIT

By attending this session, participants will become aware of:• The cost-effectiveness of re-insulating mobile home roof cavities• Mobile home roof components• Preparatory measures• Insulation properties• Specialized tools and materials• A variety of methods for accessing and insulating mobile home

roof cavities• Roof surface finishing

2 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov

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Mobile Home Roof Retrofit

Re-insulating roof cavities on mobile homes is cost-effective, according to MHEA

MOBILE HOME ROOF RETROFIT

The benefits include:• Increases thermal performance• Provides heating and cooling

savings• Reduced “roof rumble”

effective, according to MHEA


• Fairly easy to do

• Does not affect the air leakage rate as dramatically as a belly retrofit

Mobile Home Roof Components

“St b k” id b“St b k” id bBowstringBowstring M t l fiM t l fi


Bowstring roof type

“Strongback” ridge beam“Strongback” ridge beamBowstring truss assembly

Bowstring truss assembly

Metal roofingMetal roofing

Roof sheathingRoof sheathing


Existing insulation and vapor barrierExisting insulation and vapor barrier

CeilingCeiling

View from end wall

GussetGusset

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Mobile Home Roof ComponentsMOBILE HOME ROOF RETROFIT

A-frame roof type


View from end wall

Mobile Home Roof ComponentsMOBILE HOME ROOF RETROFIT

Cathedral roof type


View from end wall

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Roof Retrofit – Preparation #1MOBILE HOME ROOF RETROFIT


Photos courtesy of PA WTC

Inspect ceilings for weaknesses




Locate and seal all attic penetrations

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Now is a good time to replace a defective

Now is a good time to rep


lace a defective pbathroom fan.pbathroom fan.


Photo courtesy of PA WTC

Thickness R Value Density/ft3 Weight Bags/1 000ft2 Coverage

Insulation Coverage ChartsMOBILE HOME ROOF RETROFIT

Blown Cellulose – “Cocoon™”

Thickness R Value Density/ft3 Weight Bags/1,000ft2 Coverage

2X4 13 2.6 lbs. 0.75 lbs. 28 36 ft2

2X6 20 2.6 lbs. 1.192 lbs. 43 23 ft2

Blown Fiberglass – “Certain-Teed Optima”


Thickness R Value Density/ft3 Weight Bags/1000ft2 Coverage

2X4 14 1.6 lbs. 0.46 lbs. 17 60 ft2

2X6 22 1.6 lbs. 0.73 lbs. 26 38 ft2

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Fiberglass• Lighter in weight by volume

than cellulose

Insulation Comparison

Cellulose• Readily available commercially.

MOBILE HOME BELLY RETROFIT

than cellulose.• Certain types install better

than others in closed cavities.• Low moisture retention at 5%.• Not as readily available

as cellulose.• Price is fairly competitive

• Heavier in weight by volume than fiberglass.

• Installs extremely well in closed cavities.

• High moisture retention.• Personal respiratory protection

is required.


y pwith cellulose.

• Personal respiratory protection is required.

q• Contains chemicals which break

down metals

“Top Fill” MethodMOBILE HOME ROOF RETROFIT



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“Top Fill” – Specialized Tools & Materials

• Malco cutter, OR 6-inch hole-saw

2” diameter hose


• 2 diameter hose

• NP1 caulk

• Aluminum coil stock

• Pan-head zip screws

• Peel-and-Seal

• Elastomeric roof coating

• Heat gun



“Top Fill” - TechniquesMOBILE HOME ROOF RETROFIT



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“Top Fill” - FinishingMOBILE HOME ROOF RETROFIT



Cover with two coats of elastomeric roof coating over peel-and-seal

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“Top Fill” Method - ReviewMOBILE HOME ROOF RETROFIT

• Check the integrity of the ceiling and seal all interior leaks.

• Check the general condition of roof surfaces.

• Mark out holes down the roof about 18 inches off center line; the first holes should be 6 to 8 feet from the ends; following holes should be 12-16 feet apart.

• Cut 6 inch diameter holes.• Insert hose and fill the cavity with fiberglass insulation completing a

360-degree circle of coverage; fill to capacity.

• Insert 6 inch cap with NP1 caulked edge.

• Center and screw down 10 x 10 inch coil-stock patch over cap; caulk bottom side


Center and screw down 10 x 10 inch coil stock patch over cap; caulk bottom side of coil-stock before screwing down in proper sequence.

• Center and attach 14 x 14 inch peel-and-seal patch over coil-stock; heat with heat gun as needed and roll out any bubbles.

• Seal seams and edges with NP1 caulk

• Cover patch with 2 coats of elastomeric.

The “Side Lift” MethodMOBILE HOME ROOF RETROFIT



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“Side Lift” - Specialized Tools & Materials


• Painters pole

• Scrap 2 x 4 lumber

• Aluminum self-tapping ½” hex-head screws

• 1” Staples with pneumatic staple gun

• Lengths of aluminum mobile home gutter material

• Putty tape


• Putty tape

• Silicone caulk

• Elastomeric roof coating

“Side Lift” – Gaining Access #1MOBILE HOME ROOF RETROFIT


Remove the old gutter …remove staples from the from the roof edge and…. roof edge


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“Side Lift” – Darwin Award Candidate

Loosen the gable Loosen the gable


edge to lift the roofedge to lift the roof


Photo courtesy of WV GOEO

“Edge Lift” – Gaining Access #3

Lift the roof edge to th f it

Lift the roof edge to th f it


expose the roof cavityexpose the roof cavity



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Fill Tube Basics #1

Fill tubeFill tube


Fill tubeFill tube



Fill Tube Basics #2MOBILE HOME ROOF RETROFIT


Photos courtesy of WV GOEO

Fit the flexible insulation …..and duct tape the jointhose into the bell end of the fill tube…..

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Fill Tube Basics #3MOBILE HOME ROOF RETROFIT


Cut a taper on the end of the tube to get past obstructions


Insulation Machine SettingsMOBILE HOME ROOF RETROFIT


Open the product gate for optimal material feed


Adjust the air pressure to optimal flow

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“Side Lift” – TechniqueMOBILE HOME ROOF RETROFIT


Open the roof cavity about Work the fill tube past 4” and jack up the roof edge the ridge beam…

with scrap 2 x 4 lumber


“Side Lift” – TechniqueMOBILE HOME ROOF RETROFIT

Ensure the roof will close to original position

A small work crew can fill and close up at the


fill and close up at the Photos courtesy of WV GOEO same time

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“Side Lift” – FinishingMOBILE HOME ROOF RETROFIT


Apply putty tape to the back of the gutter before

fastening

Apply putty tape to the back of the gutter before

fastening


“Edge Lift” – Finishing #1MOBILE HOME ROOF RETROFIT


Reinstalling the old gutter is acceptable…

Photo courtesy of PA WTC Photo courtesy of WV GOEO

…or you can install a new one

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Roof CoatingMOBILE HOME ROOF RETROFIT


Image Source: http://www.koolseal.com/


Seal edges and seams with an elastomeric roof coating.

Seal edges and seams with an elastomeric roof coating.

The “Side Lift” Method - ReviewMOBILE HOME ROOF RETROFIT

• Check the integrity of the ceiling and seal all interior leaks

• Check the general condition of roof surfaces

• Select a side of the home with at least 15’ of horizontal clearance

• Erect scaffold

• Remove all screws, the roof gutter, and staples from the roof eave

• Raise and block up the roof 4 inches and insert a fill tube

• Fill to capacity with blown insulation in each cavity

• Push the roof cap down over the siding and staple into the top plate

• Close up by applying putty tape to the backside of the original or new gutter and reinstall with new hex-head screws

• Seal roof edges and seams with elastomeric roof coating


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“Gable End” Method #1MOBILE HOME ROOF RETROFIT






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f• Remove siding f

end of the home


end of the home



• Set up a scaffold at the end of the home

rom the gable end

• Assemble sections of non-conductive 2” gray PVC pipe to equal the length of the home

• Push the pipe assembly into the cavity toward the other

• Fill the cavity with insulation along the entire length and width of the home

• Reinstall gable end siding

“Ridge” MethodMOBILE HOME ROOF RETROFIT

Photos courtesy of Cal Steiner

Accessing the ceiling truss cavity through the roof ridge allows the installer to insulate the entire cavity

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“Ceiling” Method #1MOBILE HOME ROOF RETROFIT



“Blowing from the inside!”

“Ceiling” Method #2

D ill 2 i h h l t


• Drill 2-inch holes at 16 inches on center with a hole saw bit

• Space holes 3-feet apart

• Keep holes 2-feet f th d


from the edge

• Space holes evenly


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“Ceiling” Method #3MOBILE HOME ROOF RETROFIT

Fill to capacity, but Fill to capacity, but



don’t dense pack!don’t dense pack!

“Ceiling” Method #4

Seal holes with plastic plugs

Seal holes with plastic plugs


plastic plugsplastic plugs



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“Ceiling” Method - ReviewMOBILE HOME ROOF RETROFIT

• Cover the client’s belongings

• Check the integrity of the ceiling and seal all interior leaks

• Drill a series of holes evenly th ili


across the ceiling

• Fill the cavity

• Seal holes with plastic plugs


The EndMOBILE HOME ROOF RETROFIT



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SummaryMOBILE HOME ROOF RETROFIT

• Insulating roof cavities where practical and possible is cost-effective.

• Insulating roof cavities can result in significant heating and cooling savings.

• Prepare for roof insulation by inspecting interior ceilings to avoid blow outs.

• Access roof cavities through gable ends, the top, or from inside the home


inside the home.

• Fill roof cavities to capacity with fiberglass insulation

• Seal all penetrations to prevent future leaks.

• Have the right tools and materials on hand.

Documents

MOBILE HOME TRAINING Mobile Home Roof Retrofit€¦ · MOBILE HOME TRAINING Mobile Home Roof Retrofit. 1 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED ... • The cost-effectiveness