Moisture Control for Masonry

MOISTURE CONTROL

presented by International Masonry Institute

FOR MASONRY

Craftworker certification training

Sustainable Masonry Certification Program

Contractor College

Pre-job and apprentice training

International Union of Bricklayers and Allied Craftworkers

International Masonry Institute

LIFELONG LEARNING

Journeyman upgrade training

Safety, scaffold, OSHA training

Supervisor certification

IBC & MSJC

BUILDING CODES

2012 IBC goes with 2011 MSJC

MSJC date will be one year prior to companion IBC

2009 IBC goes with 2008 MSJC

IBC supersedes MSJC at points of conflict

IBC: the legally adopted model code

MSJC: the referenced standard

2012 INTERNATIONAL BUILDING CODE

SECTION 2101 GENERAL

2101.2.6 Masonry Veneer

CHAPTER 21 - MASONRY

Masonry veneer shall comply

with the provisions of Chapter

14 or Chapter 6 of TMS

402/ACI 530/ASCE 5.

SECTION 2104 CONSTRUCTION

2104.1 Masonry Construction

Masonry construction shall

comply with the requirements

of Sections 2104.1.1 through

2104.4 and with TMS 402/ACI

530/ASCE 5.

MOISTURE RESISTANCE

Brick & mortar leak

Wall system must address moisture penetration

MOISTURE RESISTANCE

6.1 GENERAL

Design of Anchored Veneer

CHAPTER 6 - VENEER

Water will penetrate the veneer and the wall system should be designed, detailed, and constructed to prevent water penetration into the building. (commentary)

e)

6.1.2

2011 Building Code Requirements for Masonry Structures (TMS 402/ACI 530/ASCE 5)

2011 MSJC

General Design Requirements 6.1.6

Water penetration through the exterior veneer is expected. The wall system must be designed and constructed to prevent water from entering the building. (commentary)

MOISTURE RESISTANCE

CAVITY WALL [DRAINAGE WALL]

Air space Flashing Weep holes

REQUIRED by Code

OPTIONAL

Mortar Dropping Collection Device (MDCD)

MOISTURE RESISTANCE

Air Barrier*

* depends on project location

MOISTURE RESISTANCE

AIR SPACE

© 2009 INTERNATIONAL MASONRY INSTITUTE

2” recommended

AIR SPACE

1” min. for veneers, per code

4½” max. btwn.

brick & backup

MOISTURE RESISTANCE

© 2009 INTERNATIONAL MASONRY INSTITUTE AIR SPACE

2” recommended

4½” max. between

brick and backup

1” min. for veneers per ACI 530 Code

MOISTURE RESISTANCE

© 2009 INTERNATIONAL MASONRY INSTITUTE AIR SPACE

MOISTURE RESISTANCE

No mortar bridging across the cavity!

AIR SPACE

2” 2”

MOISTURE RESISTANCE

MOISTURE RESISTANCE

CLEAN CAVITIES

CLEAN CAVITIES

MOISTURE RESISTANCE

Bevel the bed joints

CLEAN CAVITIES

MOISTURE RESISTANCE


CLEAN CAVITIES

MOISTURE RESISTANCE


FOUNDATION DETAIL DETAIL 01.102 REV. 10/14/07


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY

SERIES www.imiweb.org 800-IMI-0988


BRICK VENEER

AIR/WATER/VAPOR BARRIER AS REQ’D

HORIZONTAL JOINT REINFORCEMENT W/ INTEGRAL WALL TIES

2” AIR SPACE RECOMMENDED; 1” MIN. REQ’D FOR DRAINAGE WALLS

CAVITY INSERT/MORTAR COLLECTION DEVICE

METAL DRIP EDGE SET IN MASTIC OR SEALANT

WEEP VENT

THRU-WALL FLASHING TO EXTEND PAST TOP OF CAVITY INSERT

CONCRETE MASONRY BACKUP

RIGID INSUL.

CLEAN CAVITIES

MOISTURE RESISTANCE

Full-height cavity insert

CLEAN CAVITIES

MOISTURE RESISTANCE

Cleanout openings

MOISTURE RESISTANCE

AIR BARRIER

“material(s) assembled and joined together to

provide a barrier to air leakage through the

building envelope. An air barrier may be a

single material or a combination of materials.”

The International Energy Conservation Code defines

an air barrier as:

AIR BARRIER: DEFINITION

ABAA and IECC recognize air barriers in terms of:

• materials

• components

• assemblies

• systems

over an area of wall…

at a difference of air pressure

L/s (cf/m)

m2 (sf)

Pa (psf)

air leakage (flow)…

A material, assembly, or system that restricts

AIR BARRIER: DEFINITION

Source: ASTM E 2178, Standard Test Method for Air Permeance of Building Materials

IBC: WATER-RESISTIVE BARRIER

Section 1403 Performance Requirements

CHAPTER 14 – EXTERIOR WALLS

Exterior walls shall provide the building with a weather-resistant exterior wall envelope. The envelope shall be designed and constructed in such a manner as to prevent the accumulation of water within the wall assembly by providing a water-resistive barrier behind the exterior veneer, as described in Section 1404.2.

1403.2 Weather protection

2012 International Building Code

Protection against condensation in the exterior wall assembly shall be provided in accordance with Section 1405.3

Exception:

A weather-resistant exterior wall envelope shall not be required over masonry walls designed in accordance with Chapter 21.

MSJC: WATER-RESISTANT MEMBRANE

6.1 GENERAL

General Design Requirements

CHAPTER 6 - VENEER

Design and detail the backing system of exterior veneer to resist water penetration. Exterior sheathing shall be covered with a water-resistant membrane, unless the sheathing is water resistant and the joints are sealed.

6.1.6.1

6.1.6

2011 Building Code Requirements for Masonry Structures (TMS 402/ACI 530/ASCE 5)

IBC REFERENCES IECC

Section 1301 GENERAL

CHAPTER 13 – ENERGY EFFICIENCY

Buildings shall be designed and constructed in accordance with the International Energy Conservation Code.

1301.1.1 Criteria

2012 International Building Code

AIR LEAKAGE

BUILDING ENVELOPE REQUIREMENTS

Air Leakage (Mandatory)

CHAPTER 4

The thermal envelope of buildings shall comply with Sections C402.4.1 through C402.4.8

C402.4

2012 International Energy Conservation Code

COMMERCIAL ENERGY EFFICIENCY

SECTION C402

AIR BARRIERS

BUILDING ENVELOPE REQUIREMENTS

CHAPTER 4

A continuous air barrier shall be provided throughout the building thermal envelope. The air barriers shall be permitted to be located on the inside our outside of the building envelope, located within the assemblies composing the envelope, or any combination thereof. The air barrier shall comply with C402.4.1.1. and C402.4.1.2

C402.4.1 Air Barriers


COMMERCIAL ENERGY EFFICIENCY

SECTION C402

Exception: Air barriers are not required in buildings located in Climate Zones 1, 2, and 3.

AIR BARRIER CONSTRUCTION

C402.4.1.1 Air Barrier Construction


The air barrier shall be continuous for all assemblies that are the thermal envelope of the building, and across the joints and assemblies.*

1.

Air barrier joints and seams shall be sealed, including sealing transitions in places and changes in materials. Air barrier penetrations shall be sealed in accordance with Section C402.4.2

2.

The joints and seals shall be securely installed… as not to … impair its ability to resist positive and negative pressure from wind, stack effect, and mechanical ventilation.

Not required if building envelope passes ASTM

E779 Standard Test Method for Determining

Air Leakage Rate by Fan Pressurization.

*

AIR BARRIER COMPLIANCE OPTIONS

C402.4.1.2 Air Barrier Compliance Options


A continuous air barrier for the opaque building envelope shall comply with any one of the following:

C402.4.1.2.1 Materials & Components

C402.4.1.2.2 Assemblies

C402.4.1.2.3 System

or

or

An AB is a product like sealant or tape used

to create continuity between air barrier materials.

An AB is a collection of AB materials and

components assembled together in a specific manner to

create continuity.

An AB is a system of building assemblies within

the building enclosure designed, installed, and integrated

in such a manner as to stop the uncontrolled flow of air

into and out of the building enclosure.

An AB is a primary material used to resist air

leakage.

material

component

assembly

system

Source: Air Barrier Association of America (ABAA)

AIR BARRIER DEFINITIONS

A material or component is an air barrier if it meets these

maximum criteria:

.02 L/s per m2 @ 75 Pa

(.004 cfm/sf @ 1.56 psf)

1/2” sheet of gypsum board without seams, joints, or penetrations


A material or component is an air barrier if it meets these

maximum criteria:

.02 L/s per m2 @ 75 Pa

(.004 cfm/sf @ 1.56 psf)

An assembly is an air barrier if it meets these maximum

criteria:

0.2 L/s per m2 @ 75 Pa

(0.04 cfm/sf @ 1.56 psf)

A system is an air barrier if it meets these maximum

criteria:

2.0 L/s per m2 @ 75 Pa

(0.4 cfm/sf @ 1.56 psf)


AIR BARRIER MATERIALS

C402.4.1.2.1 Air Barrier Materials


• 3/8” thick plywood

• 3/8” thick OSB

• 1/2” thick XPS insulation

• 1/2” thick foil-backed polyisocyanurate insul.

• 1½” thick, 1.5 pcf closed cell spray foam

• 1/2” thick exterior or interior gyp bd. or cement bd.

• 5/8” thick Portland cement/sand parge

• 5/8” thick gypsum plaster

• C.I.P. or precast concrete

• Fully grouted CMU

.02 L/s per m2 @ 75 Pa

(.004 cfm/sf @ 1.56 psf)

These materials meet the criteria of

AIR BARRIER ASSEMBLIES

C402.4.1.2.2 Air Barrier Assemblies


0.2 L/s per m2 @ 75 Pa

(.04 cfm/sf @ 1.56 psf)

These assemblies meet the criteria of

Concrete masonry walls coated with one application of block filler and two applications of a paint or sealer coating.

•

A Portland cement/sand parge, stucco or plaster minimum 1/2” thick.

•

AIR BARRIER SYSTEM

C402.4.1.2.3 Building Test


2.0 L/s per m2 @ 75 Pa

(0.4 cfm/sf @ 1.56 psf)

Completed building (system) shall be tested and meet

criteria of

ASTM E779 Standard Test Method for Determining Air Leakage Rate by Fan Pressurization

• Impermeable

• Continuous Coverage

• Bridging Capability

• Expected Service Life (Durability)

• Secure

• Environmentally & Worker Friendly

AIR BARRIER ATTRIBUTES

Parged Mortar Sprayed Bituminous

Rolled Bituminous

MOISTURE PENETRATION RESISTANCE

AIR BARRIER TYPES

Spray polyurethane foam

Sheet membranes



Prep wall by caulking any open joints

AIR BARRIER

Tool caulk joints



Roll membrane to required thickness

AIR BARRIER

Spray on first coat

OPTION 1: AB, FLASHING OPTION 2: FLASHING, AB

AIR BARRIER PENETRATIONS & JOINTS

Penetrations of the air barrier and paths of air leakage shall be caulked, gasketed, or otherwise sealed.

C402.4.2 Air Barrier Penetrations


Joints and seals shall be sealed in the same manner or taped or covered with a moisture permeable wrapping material.

Joints and seals shall be securely installed in or on the joint for its entire length so as not to dislodge, loosen or otherwise impair its ability to resist positive and negative pressure from wind, stack effect and mechanical ventilation.

MOISTURE RESISTANCE

FLASHING

Design and detail flashing and weep holes

in exterior veneer wall systems to resist

water penetration into the building interior.

What type?

What thickness?

What locations?

FLASHING – CODE REQUIREMENT

ACI 530-02/ASCE 5-02/TMS 402-02, Chapter 6 Veneer, Section 6.1.5.2

MOISTURE RESISTANCE

FLASHING TYPES

“Approved, corrosion-resistant

flashing” shall be provided in the

exterior wall envelope in such a

manner as to prevent entry of

water into the wall cavity or

penetration of water into the

building structural framing

components.


MOISTURE RESISTANCE

FLASHING THICKNESS

BIA Tech Note 28: Anchored Brick Veneer Wood Frame Construction

Plastic flashing

should be at least 30

mil thick

MOISTURE RESISTANCE

FLASHING APPLICATIONS

above openings base of wall

sills

top of wall

shelf angles

MOISTURE RESISTANCE

FLASHING LOCATIONS

Beneath the first course of masonry above finished ground level

Other points of support such as shelf angles and lintels

At top of all exterior window and door openings

At intersection of chimneys

Under sills

At wall and roof intersections

ACI 530-02/ASCE 5-02/TMS 402-02, Chapter 6 Veneers

MOISTURE RESISTANCE

FLASHING LOCATIONS

MOISTURE RESISTANCE

BASE OF WALL

FLASHING – BASE OF WALL

RISING DAMP

Don’t bury the weeps!

Keep top of foundation above grade if possible

MOISTURE RESISTANCE

© 2009 INTERNATIONAL MASONRY INSTITUTE FOUNDATION HEIGHT

best practice

MOISTURE RESISTANCE

alternate


AIR/MOISTURE/VAPOR BARRIER AS REQUIRED

HORIZONTAL JOINT REIN- FORCEMENT W/ EYE & PINTLE WALL TIES @ 16” O.C.


BRICK VENEER

DRIP EDGE – SEAL AND ADHERE TO FOUNDATION

GROUT & REINFORCEMENT AS REQUIRED

RETURN FLASHING INTO BED JOINT OF BLOCK

FLEXIBLE FLASHING – SEAL & ADHERE TO DRIP EDGE


RIGID INSULATION

FOUNDATION DETAIL DETAIL 01.030.0305 REV. 07/01/09

FLEX. FLASHING IN CMU, DRIP EDGE

WEEP VENT INSERTS (TOP & BOTTOM OF WALL; SEE NOTES ON COMPARTMENTALIZATION)





BRICK VENEER



MECH. FASTENED TERMINATION BAR W/ CONT. SEALANT @ TOP



RIGID INSULATION


FLEX. FLASHING, DRIP EDGE, TERM. BAR





FLEX. FLASHING, DRIP EDGE, TERM. BAR, MDCD



BRICK VENEER




FLEXIBLE FLASHING – SEAL & ADHERE TO DRIP EDGE MORTAR DROPPING

COLLECTION DEVICE (MDCD)


RIGID INSULATION






BRICK VENEER




FLEXIBLE FLASHING FLUSH W/ OUTSIDE FACE OF BRICK MORTAR DROPPING

COLLECTION DEVICE (MDCD)


RIGID INSULATION


TERM. BAR, MDCD FLEX. FLASHING NO DRIP;





BRICK VENEER



RETURN FLASHING INTO BED JOINT OF BLOCK



RIGID INSULATION


FLEX. FLASHING IN CMU, DRIP EDGE


MORTAR DROPPING COLLECTION DEVICE (MDCD)





BRICK VENEER




METAL FLASHING W/ INTEGRAL DRIP EDGE


RIGID INSULATION


METAL FLASHING, TERM. BAR, MDCD

MORTAR DROPPING COLLECTION DEVICE (MDCD)

MOISTURE RESISTANCE

SILLS

FLASHING – SILL

SILL/JAMB DETAIL

HIGH PERFORMING MASONRY WALL


WOOD BLOCKING FOR WINDOW ANCHORAGE

SILL DETAIL DETAIL 01.030.0401 REV. 07/28/09

MASONRY SILL, RIGID FLASHING

FLASHING END DAM

MASONRY EXPANSION JOINT AS REQUIRED

WINDOW ASSEMBLY

MASONRY SILL W/ 1/8” x 1/8” CONT. SAW-CUT DRIP

HORIZONTAL JOINT REINFORCEMENT

RIGID INSULATION

RIGID FLASHING TO SPAN ACROSS DRAINAGE CAVITY

ALTERNATE FLASHING LOCATION

WINDOW STOOL NOT SHOWN

FLASHING - SILLS

MOISTURE RESISTANCE

Best practice: Use limestone

or precast sills

Slope rowlocks at least 15º

SILLS

MOISTURE RESISTANCE

MOISTURE RESISTANCE

HEADS

FLASHING – HEAD

HEAD DETAIL

HIGH PERFORMING MASONRY WALL

Larger unit modules make end dams difficult

FLASHING – END DAMS

MOISTURE RESISTANCE

HEAD DETAIL DETAIL 01.303 REV. 09/06/07


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY



STEEL LINTEL W/ DOUBLE ANGLE

INTERIOR VIEW EXTERIOR VIEW DETAIL FEATURES

• LOOSE LINTEL AT BRICK • STEEL ANGLES AT BLOCK • LIGHT GAUGE SUPPORT ACROSS CAVITY

HEAD DETAIL DETAIL 01.301 REV. 09/04/07


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY



STEEL LINTEL & BOND BEAM

INTERIOR VIEW

EXTERIOR VIEW

DETAIL FEATURES

• LOOSE LINTEL AT BRICK • BOND BEAM AT BLOCK • LIGHT GAUGE SUPPORT ACROSS CAVITY

SPANNING OPENINGS

Poly-wrapped steel angles used for temporary support

CAST-IN-PLACE MASONRY LINTEL

SPANNING OPENINGS

Precast masonry lintel fabricated on the ground

PRECAST LINTELS

SPANNING OPENINGS

Lintel is hoisted by lift

PRECAST LINTELS

SPANNING OPENINGS

Precast lintel set into place

PRECAST LINTELS

SPANNING OPENINGS

10-foot span

PRECAST LINTELS

FLASHING – HEAD

MOISTURE RESISTANCE

RELIEVING ANGLES

SHELF ANGLE DETAIL DETAIL 01.501 REV. 06/19/08


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY





THRU-WALL FLASHING W/ METAL DRIP EDGE SET IN MASTIC OR SEALANT

WEEP/VENT

SEALANT & BACKER ROD

RIGID INSUL.

COMPRESSIBLE FILLER, OPTIONAL

ADJUSTABLE SHELF ANGLE

TYPICAL FACE BRICK ABOVE & BELOW ANGLE

ADJUSTABLE SHELF ANGLE

TYP. FACE BRICK

SHELF ANGLE DETAIL – LIPPED BRICK DETAIL 01.502 REV. 10/14/07


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY





THRU-WALL FLASHING W/ METAL DRIP EDGE SET IN MASTIC OR SEALANT

WEEP/VENT

SEALANT & BACKER ROD

RIGID INSUL.

COMPRESSIBLE FILLER, OPTIONAL

ADJUSTABLE. SHELF ANGLE

LIPPED BRICK, OPTIONAL

FLASHING – RELIEVING ANGLES

Too many relieving angles

MOISTURE RESISTANCE

MOISTURE RESISTANCE

ROOF-WALL CONNECTION

FLASHING – ROOF/WALL CONNECTION

ROOF DETAIL HIGH WALL – LOW ROOF DETAIL 01.704 REV. 11/6/07


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY



CUT BLOCK BELOW FLASHING

HORIZONTAL JOINT REINF. @ 16” O.C. W/ INTEGRAL WALL TIES

ROOF MEMBRANE

TERMINATION BAR W/ CONT. SEALANT

FACE BRICK

THRU-WALL FLASHING

ROOF STRUCTURE

SHEET METAL RECEIVER

COUNTER- FLASHING

WEEP VENT

THRU-WALL FLASHING

CMU BACKUP

CAVITY INSUL.

MOISTURE RESISTANCE

TOP OF WALL

FLASHING – TOP OF WALL

MASONRY WALL CAP DETAIL 01.752 REV. 11/04/08


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY



MASONRY COPING: LIMESTONE, CAST STONE, CALCIUM SILICATE, OR PRECAST CONCRETE; OVERHANG MASONRY WALL 1½” MIN.; SLOPED TOP

SEE DETAIL 01.759 FOR WALL CAP JOINT OPTIONS

THROUGH-WALL FLASHING W/ 1/2” DRIP EDGE

1/8” SAW-CUT DRIP, BOTH SIDES OF WALL CAP

DRAINAGE CAVITY

GROUT & REINFORCING AS REQ’D.

SEALANT BELOW DRIP, OPT. (NOT SHOWN)

HORIZONTAL JOINT REINFORCEMENT W/ WALL TIES

GROUT OR MORTAR FILL FOR DOWEL ANCHORAGE AND FLASHING SUPPORT

S.S. DOWEL W/ SEALANT AROUND PENETRATIONS THROUGH FLASHING

RIGID INSULATION

FILLED CAVITY

FACE BRICK

SEALANT & BACKER ROD, BOTH SIDES OF WALL CAP

MESH TO RETAIN GROUT OR MORTAR FILL



BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY





CANTED S.S. THRU-WALL FLASHING W/ 1/2” EXPOSED DRIP EDGE


OPEN DRAINAGE CAVITY, OPTIONAL ABOVE ROOF LINE; ALSO SEE DETAIL 01.752

GROUT & REINFORCING AS REQ’D.


HORIZONTAL JOINT REINFORCEMENT W/ WALL TIES

SLOPED MORTAR BED TO SUPPORT CANTED FLASHING, OPT.


RIGID INSULATION

OPEN CAVITY

FACE BRICK


TOP OF WALL

MOISTURE RESISTANCE

Drill through flashing for anchor Seal around dowel penetration



SIN

GLE

WYTH

E B

LOC

K

DETAILING MASONRY





S.S. FLASHING DRIP, BOTH SIDES OF CAP



HORIZONTAL JOINT REINFORCEMENT

GROUT OR MORTAR FILL FOR DOWEL ANCHORAGE AND FLASHING SUPPORT

SINGLE WYTHE CMU


MESH TO RETAIN GROUT OR MORTAR FILL


FLASHING – TOP OF WALL

MOISTURE RESISTANCE

TOP OF WALL

MOISTURE RESISTANCE

Rowlock caps not recommended

Limestone, manufactured stone, or precast concrete caps are better

MASONRY COPING JOINTS DETAIL 01.759 REV. 11/04/08


BRIC

K &

BLO

CK C

AV

ITY W

ALL

DETAILING MASONRY



TOOLED MORTAR JOINT

OPTION 1

RAKE BACK MORTAR AND APPLY SEALANT JOINT

OPTION 2

SEALANT AND BACKER ROD

OPTION 3

Rowlock caps not recommended

TOP OF WALL

MOISTURE RESISTANCE

FLASHING – PROBLEMS TO AVOID

Freeze-thaw damage

at top courses

Flashing is held back from face

below joints in coping Damage is more severe

MOISTURE RESISTANCE

MOISTURE RESISTANCE

LAPS AND DRIP EDGES

How far should flashing extend?

FLASHING – DRIP EDGES

MOISTURE RESISTANCE

Not enough! Too much!

“The flashing shall extend to the surface of

the exterior wall finish, and shall be installed

to prevent water from reentering the exterior

wall envelope.” - IRC Section R703 Flashing

Metal drip edge

is best practice!

FLASHING – DRIP EDGES

MOISTURE RESISTANCE


METAL DRIP EDGE DETAIL 15.000.0201 REV. 05/18/09

METAL DRIP EDGE W/ HEM, 30º OR 45º FROM HORIZONTAL, SEALED TO FOUNDATION W/ MFR.-APPROVED ADHESIVE

1/4” – 3/4”

1 5/8” MIN.

1/2” MIN. IF RUBBERIZED ASPHALT IS USED FOR FLEXIBLE FLASHING, TO PREVENT DROOL

3/4” MIN. OVERLAP, SEALED W/ MFR-APPROVED ADHESIVE

FLEXIBLE THRU-WALL FLASHING

…and adequately seal!


Lap all seams

MOISTURE RESISTANCE


FLASHING LAP DIAGRAM 15.410.4101 REV. 02/10/11

6” LAP

DRIP EDGE SET IN SEALANT

PRIMER PER MANUF’R

SEAL FLASHING LAPS W/ MASTIC PER MANUF’R

RETURN FLASHING INTO BLOCK COURSE (SHOWN) OR SECURE TO BACKUP W/ TERMINATION BAR

SUBJECT OF DETAIL

THROUGH-WALL FLASHING OVERLAPS (LAPS) AND SEALING RECOMMENDATIONS

EXCLUDED FROM SUBJECT

FLASHING DRIP EDGE LAPS, TERM. BAR, FACE BRICK, CAVITY INSULATION, AND OTHER WALL COMPONENTS

DRIP EDGE DETAIL DETAIL 03.01 REV. 02/13/07

LAPPED AND SEALED THROUGH-WALL FLASHING

OF MASONRY OUTER FACE

EDGE SET IN MASTIC METAL DRIP W/ HEMMED

OR SEALANT


NOTCHED DRIP EDGE

OF MASONRY OUTER FACE

FOR BUTT JOINT, NOTCH DRIP EDGE

SEE INSET ABOVE

1-800-IMI-0988 www.imiweb.org


masonry detailing series

3/4”±

FLASHING – LAPS

MOISTURE RESISTANCE

6” LAP

MOISTURE RESISTANCE

FLASHING LAPS

Seal laps

MOISTURE RESISTANCE

FLASHING FAILURES

Keep top of

foundation

above grade

Don’t bury

the weeps!

FLASHING – INSTALLATION

MOISTURE RESISTANCE

Flashing must be intact!


MOISTURE RESISTANCE

Hold rubberized as-

phalt back from face

Don’t use membrane

as a drip edge


MOISTURE RESISTANCE


Avoid using PVC

not stable

MOISTURE RESISTANCE

Avoid sharp corners Use rounded corners


MOISTURE RESISTANCE


Flashing held back from face

MOISTURE RESISTANCE

MOISTURE RESISTANCE

CORNER BOOTS & END DAMS

FLASHING – CORNERS

MOISTURE RESISTANCE

Flashing discontinuous

at corner

Continuous flashing


FLASHING CORNERS DETAIL 15.000.0204 REV. 08/24/09

INSIDE CORNER FLASHING PIECE

OVERLAP FLASHING

OUTSIDE CORNER FLASHING PIECE

VIEW OF FINISHED CONTINUOUS FLASHING INSTALLATION (DRIP EDGES NOT SHOWN)

NOTE: FLASHING DRIP EDGES NOT SHOWN FOR CLARITY


FLASHING CORNERS DETAIL 15.000.0204.PH REV. 08/24/09

NOTE: FLASHING DRIP EDGE NOT SHOWN FOR CLARITY

Field-applied corner boot

FLASHING – CORNERS

MOISTURE RESISTANCE

end dam

required!


MOISTURE RESISTANCE


END DAM DIAGRAM DIAGRAM 01.410.0201 REV. 02/04/11

EXTEND FLASHING FLUSH OR BEYOND FACE OF MASONRY

CARRY FLASHING ½” MIN. BEYOND END OF LINTEL AND TURN UP TO FORM END DAM IN HEAD JOINT

FIELD-FORMED FLASHING END DAM

CAVITY INSULATION NOT SHOWN FOR CLARITY OF DETAIL

2” RECOMMENDED; 1” MIN.

SEALANT

NOTE: STRUCTURAL ELEMENTS MAY VARY, AND ARE SHOWN FOR ILLUSTRATION ONLY


END DAM DIAGRAM DIAGRAM 01.410.0202 REV. 02/04/11

EXTEND FLASHING FLUSH OR BEYOND FACE OF MASONRY

PREFABRICATED END DAM IN HEAD JOINT; SET IN MASTIC IF FLASHING IS NOT SELF-ADHERING. END DAM PLACED PRIOR TO THROUGH-WALL FLASHING

2” RECOMMENDED; 1” MIN.

PREFABRICATED FLASHING END DAM

CARRY FLASHING ½” MIN. BEYOND END OF LINTEL

CAVITY INSULATION NOT SHOWN FOR CLARITY OF DETAIL

SEALANT

NOTE: STRUCTURAL ELEMENTS MAY VARY, AND ARE SHOWN FOR ILLUSTRATION ONLY


MOISTURE RESISTANCE


MOISTURE RESISTANCE


MOISTURE RESISTANCE

MOISTURE RESISTANCE

WEEP VENTS

Weep holes shall be at least 3/16” in diameter

and spaced less than 33” on center.


International Residential Code 2000, Section R703.7.6 Weep Holes

Best practice: 16” o.c. max for rope wicks,

24” o.c. for open head joints or vents

WEEP HOLES

MOISTURE RESISTANCE

sash cord

plastic

sleeve

fiber mesh vent

plastic

tube cell vent

head joint vent

WEEP HOLES - TYPES

MOISTURE RESISTANCE

“Weep holes shall be at least 3/16” in diameter

and spaced less than 33” on center”


International Residential Code 2000, Section R703.7.6 Weep Holes

Best practice: Don’t use rope wicks!

Best practice: 16” o.c. max for rope wicks (if you

must), 24” o.c. for open head joints or vents

WEEP HOLES – SIZE & SPACING

MOISTURE RESISTANCE

WEEP HOLES RESIDENTIAL MASONRY

Best practice: if you must use rope

wicks, lay them continuously along

bottom of cavity

Best practice: Don’t use rope wicks!

Best practice: if you must

use rope wicks, lay them

continuously along bottom

of cavity

Best practice: Don’t use

rope wicks!

WEEP HOLES – PLACEMENT

MOISTURE RESISTANCE

WEEP HOLES – ROPE WICKS

Vulnerable to mortar blockage

Do not ventilate

MOISTURE RESISTANCE

Vulnerable to mortar blockage

Do not ventilate

WEEP HOLES – TUBES

MOISTURE RESISTANCE

WEEP HOLES – OPEN HEAD JOINTS

Better moisture relieve & ventilation

May attract insects

May mistakenly be caulked

MOISTURE RESISTANCE

WEEP VENTS

MOISTURE RESISTANCE

WEEP VENTS

MOISTURE RESISTANCE

WEEP VENTS

MOISTURE RESISTANCE

MOISTURE RESISTANCE

RECESSED AND PROJECTING

COURSES

RECESSED COURSE

MOISTURE RESISTANCE

ARCHITECTURAL EFFECT DETAIL 01.601 REV. 08/31/07

BRIC

K &

BLO

CK C

AV

ITY W

ALL

MORTAR

WASH

DETAILING MASONRY



RECESSED COURSE

MOISTURE RESISTANCE

FULL HEAD JOINTS

MOISTURE RESISTANCE

MOISTURE RESISTANCE

EFFLORESCENCE

EFFLORESCENCE

MOISTURE RESISTANCE

Structural

Durable / Low Maintenance

Economical

Beauty

BENEFITS OF BUILDING WITH MASONRY

Versatility of Design

Ease of Construction

Fire & Impact Resistant

Contextual / Relatable

Sustainable

Energy Efficient

High Performance

Acoustic

Qualified Local Labor

Education

Moisture Control for Masonry