HomeMy WebLinkAboutFile Documents.533 W Hallam St.0031-2022-BCHO (7)SECTION 07 27 27.01
WATER-RESISTIVE AIR BARRIER MEMBRANE
PROJECT NAME SECTION 07 27 27 - 1 VAPOR PERMEABLE BARRIER
07.11.17
SPEC WRITERS NOTE: This specification includes materials and installation procedures for WrapShield® IT
Integrated Tape Water-Resistive Vapor Permeable Air Barrier Sheet Membrane meeting ASTM E2357 for air barrier
assemblies. WrapShield® IT Integrated Tape sheet membrane is used behind rain screen wall cladding assemblies
such as pressure equalized cladding systems incorporating composite and metal materials, masonry and stone
veneers, stucco and mechanically attached EIFS. With a vapor permeance rating of greater than 50 perms (2861
ng/Pa.s.m2) WrapShield® IT Integrated Tape Water-Resistive Vapor Permeable Air Barrier Sheet membrane
prevents air leakage and allows the wall assembly to breathe or ‘dry-out’ as necessary to meet the conditions of
seasonal changes for each climate zone. This guide specification should be adapted to suit the requirements of
individual projects. It is prepared in CSI Master Format and should be included as a separate section under Division
7 - Thermal and Moisture Protection.
PART 1 - GENERAL
1.01 GENERAL REQUIREMENTS
A. This Specification shall be read as a whole by all parties concerned. Each Section may contain more
or less the complete work of any trade. The Contractor is solely responsible to make clear to the
Subcontractors the extent of their work and coordinate overlapping work.
1.02 SYSTEM DESCRIPTION
A. Supply labor, materials and equipment for a mechanically attached water-resistive weather barrier
membrane system.
B. Complete Work as shown on the Drawings and specified herein to bridge gaps and seal the water -
resistive vapor permeable air barrier membrane against air leakage and water intrusion , including:
1. Connections of the walls to the roof membrane
2. Connections of the walls to the foundations
3. Seismic and expansion joints
4. Openings and penetrations of window and door frames, store front, curtain wall
5. Piping, conduit, duct and similar penetrations
6. Masonry ties, screws, bolts and similar penetrations
7. All other air leakage pathways in the building envelope
C. Install primary water-resistive vapor permeable air barrier, flashing, and accessories.
1.03 RELATED SECTIONS
A. Masonry Veneer: Section [04 XX XX]
B. Gypsum Sheathing: Section [06 XX XX]
C. Plywood Sheathing: Section [06 XX XX]
D. Insulation: Section [07 XX XX]
E. Roofing: Section [07 XX XX]
F. Wall Panels: Section [07 XX XX]
G. Flashing Section [07 XX XX]
H. Sealants Section [08 XX XX]
I. Door Frames Section [08 XX XX]
J. Window Frames Section [08 XX XX]
1.04 REFERENCE STANDARDS
A. ASTM International (ASTM):
1. ASTM D5034 - Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab
Test).
2. ASTM E96/E 96M - Test Methods for Water Vapor Transmission of Materials.
3. ASTM E398 Standard Test Method for Water Vapor Transmission Rate of Sheet Materials
Using Dynamic Relative Humidity Measurement.
4. ASTM E2178 - Standard Test Method for Air Permeance of Building Materials.
5. ASTM E2357 - Standard Test Method for Determining Air Leakage of Air Barrier Assemblies.
6. ASTM E283 - Standard Test Method for Determining Rate of Air Leakage Through Exterior
Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the
Specimen.
7. ASTM E84 - Test Method for Surface Burning Characteristics of Building Materials.
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B. American Association of Textile Chemists and Colorists (AATCC): ATCC 127 - Test Method for
Water Resistance: Hydrostatic Pressure Test.
C. International Code Council Evaluation Service, Inc. (ICC-ES): ICC-ES AC38 - Acceptance Criteria
for Water-Resistive Barriers.
1.05 SUBMITTALS
A. Submit manufacturers’ current product data sheets, details and installation instructions for the water-
resistive vapor permeable air barrier membrane components and accessories.
B. Submit samples of the following:
1. Manufacturer's sample warranty
2. Water-resistive vapor permeable air barrier sheet, minimum 8 by 10 inches (203 by 254 mm)
3. Components, minimum 12 inch (305 mm) lengths
4. Membrane flashings
5. Fasteners, clips, strapping, cladding attachment fasteners and masonry ties
6. Sealants
1.06 QUALITY ASSURANCE
A. Single Source: Mechanically attached water-resistive vapor permeable air barrier membrane
components and accessories must be obtained as a single-source membrane system to ensure total
system compatibility and integrity.
B. Manufacturer Qualifications
1. Manufacturer of specified products listed in this Section to have minimum 10 years of
continued experience in the manufacture and supply of highly vapor permeable water
resistive air barrier products successfully installed in similar project applications.
2. Manufacturer of specified products listed in this Section to have experienced in-house
technical and field observation personal qualified to provide expert technical support.
C. Fire Performance Characteristics: Provide water-resistive barrier meeting the following fire-test
characteristics.
1. Surface-Burning Characteristics: ASTM E84 Class “A” Rating:
Flame spread index: 25 or less
Smoke developed index: 450 or less
1.07 MOCK-UP
A. Construct mock-up in accordance with Section 01 43 39 – Mock-ups.
B. Provide mock-up of specified water-resistive vapor permeable air barrier materials under provisions
of Section 01 33 23 - Shop Drawings, Product Data and Samples.
C. Where directed by [engineer] [architect] [consultant], construct typical exterior wall panel, 6 foot long
by 6 foot wide incorporating the sheathing surfaces or substrate, window rough opening preparation
or flashing method, window frame and attachment method, clips, strapping or masonry ties, or
cladding attachment components, attachment of insulation and detailing of water-resistive vapor
permeable air barrier membrane application and lap seams.
1. Perform water spray test of mockup to demonstrate performance, as per ASTM Standards.
D. Allow 48 hours for inspection of mock -up by [engineer] [architect] [consultant] before proceeding with
water-resistive vapor permeable air barrier work. Mock-up may remain as part of the work.
1.08 PRE-INSTALLATION CONFERENCE
A. Contractor shall convene [one] week prior to commencing work of this section, under provisions of
Section 01 31 19 – Project Meetings.
B. Ensure all contractors responsible for creating a continuous plane of water and air tightness are
present.
1.09 DELIVERY, STORAGE AND HANDLING
A. Refer to current Product Installation Instructions and SDS at www.vaproshield.com for proper storage
and handling.
B. Deliver materials to the job site in undamaged and original packaging indicating the name of the
manufacturer and product.
C. Store roll materials on end in original packaging. Protect rolls from direct sunlight and inclement
weather until ready for use.
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D. Waste Management and Disposal
1. Separate and recycle waste materials in accordance with Section [01355 - Waste
Management and Disposal], and with the Waste Reduction Work Plan.
1.10 COORDINATION
A. Ensure continuity of the mechanically attached water-resistive vapor permeable air barrier system
throughout the scope of this section.
1. Air barrier vapor permeable membrane to include self -adhered or mechanically attached air barrier,
transition membranes and sealants at penetrations.
2. Drainage plane to include drainage cavity, water resistive barrier and flexible flashings to the exterior.
1.11 ALTERNATES
Submit request for alternates in accordance with Section 01 25 00 – Substitution Procedures.
A. Submit requests for alternates a minimum of ten (10) working days prior to bid date.
B. Alternate submission to include:
1. Evidence that alternate materials meet or exceed performance characteristics of specified
Product requirements as well as documentation from an approved independent testing
laboratory certifying the minimum physical dimensions, tensile strength, fire burning
characteristics, vapor permeance and air leakage rates of the fully self-adhered water-
resistive vapor permeable air barrier membrane. All testing to be performed without the aid
of primers or surface conditioners.
2. Manufacturer’s complete set of details for mechanically attached water-resistive vapor
permeable air barrier membrane system showing a continuous plane of water and air
tightness throughout the building enclosure.
3. Manufacturer of alternate materials has experienced in-house technical and field observation
personal qualified to provide expert technical support.
C. Acceptable alternates will be confirmed by addendum. Substitute materials not approved in writing
prior to bid date shall not be permitted for use on this project.
1.12 WARRANTY
A. Provide manufacturer’s standard material warranty in which manufacturer agrees to provide
replacement material for the mechanically attached water-resistive vapor permeable air barrier
sheets installed in accordance with manufacturer's instructions that fail due to material defects within
20 years of the date of Purchase.
PART 2 - PRODUCTS
2.01 MATERIALS
A. Primary mechanically attached water-resistive vapor permeable air barrier membrane components
and accessories must be obtained from a single-source manufacture to ensure total system
compatibility and integrity.
1. Mechanically attached water-resistive vapor permeable air barrier membrane by
VaproShield LLC., Gig Harbor, WA, Phone: (866) 731-7663, Website:
www.vaproshield.com.
B. WATER-RESISTIVE VAPOR PERMEABLE MECHANICALLY ATTACHED AIR BARRIER
MATERIALS (Basis of Design)
1. Primary mechanically attached air barrier sheet membrane shall be WrapShield® IT
Integrated Tape water-resistive vapor permeable air barrier sheet membrane by
VaproShield, a zero VOC vapor permeable air barrier sheet membrane consisting of multiple
layers of spun-bonded polypropylene tested in accordance with ICC-ES AC 38 criteria to
meet IBC and IRC requirements for weather resistive barriers having the following
properties:
a. Color: Orange with allowable UV exposure for 180 days, prior to coverage.
b. Breaking strength and Elongation to ASTM D5034: 100.1 lbf (445.3 N), machine
direction; 86.1 lbf (383 N), cross-machine direction.
c. Water Vapor Permeance tested to ASTM E96 Method B: minimum of 66.9 perms
(3827 ng/Pa.s.m2)
d. Water Vapor Permeance tested to ASTM E398: minimum of 72.04 perms (4121
ng/Pa.s.m2)
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e. Air Leakage: ≤0.0001 cfm/ft2 @ 1.57 psf (≤0.0004 L/s m2 @ 75 Pa) when tested in
accordance with ASTM E2178 and ≤0.01 cfm/ft2 @ 1.57 psf (≤0.01 L/s m2 @ 75 Pa))
when tested in accordance with ASTM E2357.
f. Water Resistance tested to AATCC 127, 550 mm hydrostatic head for 5 hours: No
leakage
g. Application Temperature: No minimum temperature.
h. Surface Burning Characteristics tested to ASTM E84: Class A, Flame-spread index
of 0, Smoke-developed index of less than 55
i. Physical Dimensions: 0.022 inches (0.56 mm) thick and 59 inches (1.5 m) wide and
5.7119 oz/yd2 (193.67 g/m2).
C. WATER-RESISTIVE VAPOR PERMEABLE TRANSITION AND FLASHING MEMBRANE Part One
of a two part Flashing System
1. Self-adhered air barrier transition and flashing membrane for all window jambs, headers,
door openings, inside and outside corners, and other transitions shall be pre -cut
VaproFlashing SA™ Self Adhered or VaproFlashing™ by VaproShield, a zero VOC fully self-
adhered or mechanically attached water-resistive vapor permeable sheet membrane having
the following properties:
a. VaproFlashing SA™ Self-Adhered flashing Orange: 11 3/4 inches (30 cm) or 19 2/3
inches (50 cm) wide x 164 feet (50 m) long
i. Air Leakage: ≤0.00002 cfm/ft2 @ 1.57 psf (≤0.0001 L/s m2 @ 75 Pa) when
tested in accordance with ASTM E2178 and <0.01 cfm/ft2 @ 1.57 psf (<0.01
L/s m2 @ 75 Pa)) when tested in accordance with ASTM E2357
ii. Water Vapor Permeance tested to ASTM E96 Method B: minimum 50
perms (2188 ng/Pa.s.m2)
iii. Water Vapor Permeance tested to ASTM E398: minimum of 52 perms
(3007 ng/Pa.s.m2)
iv. Water Resistance tested to AATCC 127, 550 mm hydrostatic head for 5
hours: No leakage
b. VaproFlashing™ Orange: 11 3/4 inches (30 cm) or 19 2/3 inches (50 cm) wide x 164
feet (50 m) long
i. Air Leakage: ≤0.0001 cfm/ft2 @ 1.57 psf (≤0.0004 L/s m2 @ 75 Pa) when
tested in accordance with ASTM E 2178 and <0.01 cfm/ft2 @ 1.57 psf (<0.01
L/s m2 @ 75 Pa)) when tested in accordance with ASTM E2357
ii. Water Vapor Permeance tested to ASTM E96 Method B: minimum of 66.9
perms (3827 ng/Pa.s.m2)
iii. Water Vapor Permeance tested to ASTM E398: minimum of 72.04 perms
(4121 ng/Pa.s.m2)
iv. Water Resistance tested to AATCC 127, 550 mm hydrostatic head for 5
hours: No leakage
SPEC WRITERS NOTE: Acceptable substrates for WrapShield® IT Integrated Tape water-resistive vapor permeable
air barrier sheet membrane include DensGlass, exterior grade gypsum board, plywood, precast concrete, cast-in
place concrete, concrete block, brick, steel, aluminum, OSB and galvanized metal. Best practice guidelines for the
mechanically attached application of WrapShield® IT on clean sheathing surfaces. Applications of WrapShield® IT
on sheathing surfaces clean of oil, dust, or other contaminates including primers, should be followed by two handed
roller pressure of the integrated tape to insure good adhesion, immediately after installation of material.
Rough opening flashing system includes two components. Part I: Either VaproFlashing™ or VaproFlashing™ SA
Self-Adhered flashing and Part II: VaproLiqui-Flash™ or as alternates, Vapro-SS Flashing™ or VaproBond™
Flashing.
D. VAPROLIQUI-FLASH™ VAPOR PERMEABLE WATER RESISTIVE FLASHING FOR ROUGH
OPENINGS Part II of Two Part Flashing System
1. Window and door pre-cut VaproFlashing™ SA Self-Adhered flashing or VaproFlashing™
shall include VaproLiqui-Flash™ by VaproShield, a liquid-applied vapor permeable air
barrier flashing material with vapor permeance and resistance to air leakage properties
compatible with the primary air barrier membrane.
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SPEC WRITERS NOTE: Best construction practice for wood frame construction is to protect the jamb of rough
openings with the two part system of VaproFlashing™ SA Self-Adhered flashing and vapor permeable VaproLiqui-
Flash™ to reduce the risk of wood deterioration. Alternatively, for steel stud frame construction with De nsGlass or
gypsum sheathing surfaces a Vapro-SS Flashing™ or VaproBond™ Flashing may be used to protect the head, jamb
and sill of rough openings.
E. ALTERNATE: VAPROBOND™ FLASHING WATER IMPERMEABLE LOW VAPOR PERMEANCE
FLASHING FOR ROUGH OPENINGS Alternate for Part II of Two Part Flashing System
1. Window and door shall include VaproBond™ Flashing by VaproShield, a modified silicon
sealant.
a. VaproBond™ Flashing: 20 ounce (592 ml) sausage.
b. Elongation: 1,500 % when tested in accordance with ASTM D412.
F. ALTERNATE: VAPRO-SS FLASHING™ WATER IMPERMEABLE FLASHING FOR ROUGH
OPENINGS Alternate for Part II of Two Part Flashing System
2. Window and door shall include Vapro-SS Flashing™ by VaproShield, a flexible 2 mil (0.05
mm) stainless steel sheet with an 8 mil (0.20 mm) butyl adhesive backing.
a. Vapro-SS Flashing™: 4, 6, 9, 12, 18 or 24 inches (10.2, 15.2, 22.9, 30.5, 45.7, 61
cm) x 50 feet (15.24 m) long.
b. Tensile Strength/Puncture: 100,000 psi when tested in accordance with ASTM
D882 and 2,500 psi when tested in accordance with ASTM E154.
G. THROUGH WALL FLASHING
1. Thru-wall flashing shall include Vapro-SS Flashing™ by VaproShield, a flexible 2 mil (0.05
mm) stainless steel sheet with an 8 mil (0.20 mm) butyl adhesive backing and may include
a VaproTermination Bar™ when the top section of the Vapro-SS Flashing™ is exposed.
a. Vapro-SS Flashing™: 4, 6, 9, 12, 18 or 24 inches (10.2, 15.2, 22.9, 30.5, 45.7, 61
cm) x 50 feet (15.24 m) long.
b. Tensile Strength/Puncture: 100,000 psi when tested in accordance with ASTM
D882 and 2,500 psi when tested in accordance with ASTM E154
c. VaproTermination Bar™: 1 inch (25 mm) wide x 8 feet (2.4 m) long, UV-resistance
rigid thermoplastic extrusion, if required by sequence of installation.
H. TRANSITION FLASHING
2. Transition flashing shall include VaproSilicone Transition™ by VaproShield, a flexible 80 mil
(2 mm) extruded silicone sheet.
a. VaproSilicone Transition™: 4, 6 or 9 inches (10.2, 15, 23 cm) x 50 feet (15.24 m)
long.
b. Dynamic Movement Capability: +200 / -50 % when tested in accordance to ASTM
C1523.
c. Elongation: 400 % when tested in accordance to ASTM D412.
d. Tensile Strength: 295 psi (2.03 MPa) when tested in accordance with ASTM D412.
e. Tear Strength: 20 ppi (3.5 N/mm) when tested in accordance to ASTM D624.
SPEC WRITERS NOTE: With pressure equalized rain screen wall cladding systems such as composite wall panels
and metal siding, air circulation and cavity ventilation is critical in allowing moisture to escape. VaproBattens™ with
VaproVent™ Strips, the VaproShim SA™ Self-Adhered and VaproMat™ ensure continuous air flow throughout the
cavity, for the life of the building. Include 2.1.H. for Water-Resistive Weather Barrier Batten and Ventilation
Accessories.
I. WATER-RESISTIVE WEATHER BARRIER BATTEN, SHIM OR MAT ACCESSORIES
1. Water-resistive weather barrier batten and ventilation accessories by VaproShield shall be
made of black PVC material.
a. VaproBatten™ Black vinyl extrusion with pre-formed moisture drainage channels
configured to create a ventilated airspace between wall cla dding and weather-
resistive barrier, bull nose edges prevent membrane tearing. Fasteners are installed
directly through VaproBatten™ into the structural elements regardless of weather
conditions.
b. VaproVent™ Strips are available in two types: VaproVent™ L Strip and
VaproVent™ Hook Strip.
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i. VaproVent™ Gray vinyl L Strips are attached to the top and bottom of
VaproBattens™. They prevent insect invasion and provide maximum
ventilation.
ii. VaproVent™ Gray vinyl Hook Strips are used with VaproBattens as a starter
strip for vinyl and beveled siding applications, in place of the VaproVent™ L
Strip at the bottom of the assembly.
c. VaproShim SA™ Self-Adhered, Neoprene/EPDM accessory used under horizontal
or vertical cladding attachment components to create a vertical rain screen drainage
plane for cladding, while sealing fastener penetrations.
d. VaproMat™ Lightweight, hydrophobic filter fabric with a 3 mm or 7 mm
polypropylene drainage matrix attached, designed to keep the drainage cavity clean
and unobstructed during the lath and plaster or adhesive mortar installation,
promoting rapid draining and drying of the rain screen cavity.
2.02 PENETRATION SEALANT
A. Provide sealant for penetrations as recommended by manufacturer and as specified under Division
07 Section: Sealants. Appropriate sealants shall be VaproBond™ or VaproLiqui-Flash™.
PART 3 EXECUTION
3.01 GENERAL
A. Verify that surfaces and conditions are ready to accept the work of this section. Notify [engineer]
[architect] [consultant] in writing of any discrepancies. Commencement of the work or any parts
thereof shall mean acceptance of the prepared substrates.
B. All surfaces must be dry, sound, clean, free of oil, grease, dirt, excess mortar or other contaminants
detrimental to the attachment of the mechanically attached water resistive air barrier membrane and
flashings. Fill voids and gaps in substrate greater than 7/8 inch (22 mm) in width to provide an even
surface. Strike masonry joints full-flush.
C. No minimum application temperature of mechanically attached water-resistive vapor permeable air
barrier sheet membrane and mechanically attached flashings.
D. Ensure all preparatory work is complete prior to applying primary mechanically attached water-
resistive vapor permeable air barrier sheet membrane.
E. Mechanical fasteners used to secure sheathing surfaces or penetrate sheathing surfaces shall be
set flush with sheathing, fastened into solid backing and covered with the upper overlapping
membrane. If exposed fasteners are present on the surface of the membrane, cover and seal with
Vapro-LiquiFlash™ or VaproBond™.
F. If exposed fasteners are required, use VaproCaps™ to insure water/air tight seal.
3.02 COORDINATION OF MECHANICALLY ATTACHED VAPOR PERMEABLE WATER RESISTIVE AIR
BARRIER MEMBRANE INSTALLATION
A. Download Installation Instructions at http://vaproshield.com/public-documents/installation-
instructions.
B. Installation Summary:
a. Mechanically attached water-resistive vapor permeable air barrier sheet membrane should
be installed horizontally over the outside face of exterior sheathing surfaces or other
approved substrates.
b. Complete detail work at; wall openings, building transitions and penetrations prior to field
applications.
c. Install mechanically attached water-resistive vapor permeable air barrier s heet membrane
over the outside face of exterior sheathing surfaces or substrate, measure and pre-cut into
manageable sized sheets to suit the application conditions.
d. Install mechanically attached water-resistive vapor permeable air barrier s heet membrane
complete and continuous to substrate in a sequential minimal 6 inch (76 mm) horizontal
overlapping weatherboard.
e. Stagger all vertical end lap seams and overlap a minimum of 12 inch (305 mm).
f. Roll installed membrane with roller to ensure positive contact and adhesion immediately after
the integral tape release film has been removed at the horizontal overlaps.
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3.03 BUILDING TRANSITION CONDITIONS
A. Consult published details at WWW.VaproShield.com.
B. Tie-in to structural beams, columns, floor slabs and intermittent floors, parapet curbs, foundation
walls, roofing systems and at the interface of dissimilar materials with self-adhering air barrier
transition and flashing membrane.
C. Align and position fully self-adhered air barrier transition and flashing membrane, remove protective
film and press firmly into place. Provide minimum 6 inch (152 mm) lap on to substrates.
D. Ensure minimum 6 inch (152 mm) overlap at side and end laps of membrane and 6 inch (152 mm)
at inside and outside corners, if joints occur at corner locations.
E. Roll membrane and lap seams with roller to ensure positive contact and adhesion, immediately.
3.04 MECHANICAL EQUIPMENT PENETRATIONS
A. Mechanical pipe, electrical conduit and/or duct work must be secured solid into position prior to
installation of mechanically attached water-resistive vapor permeable air barrier sheet membrane.
B. Electrical services penetrating the wall assembly and mechanically attached water-resistive vapor
permeable air barrier sheet membrane must be placed in appropriate conduit and secured solid into
position.
C. Install manufactured flanged penetration sleeves as recommended by sleeve manufacturer.
D. For straight sided penetrations, cut and fit mechanically attached water-resistive vapor permeable
air barrier sheet membrane to accommodate sleeve, install VaproLiqui-Flash™ to seal the air barrier
membrane to ductwork or preformed flange sleeve.
E. For pipe penetrations, refer to manufacturer’s standard details.
3.05 WINDOW, DOOR AND OTHER WALL OPENINGS
A. Consult published installation instructions at WWW.VaproShield.com.
B. Two part flashing system; VaproFlashing™ SA Self Adhered or VaproFlashing™ and VaproLiqui-
Flash™, Vapro-SS Flashing™ or VaproBond™ Flashing by VaproShield around window or wall
openings subject to the opening size and installation of window, door or louver type.
C. VaproFlashing™ SA Self-Adhered flashing or VaproFlashing™ air barrier transition and flashing
membrane installed 2 ¾ inch (70 mm) into rough wall openings for the sill, jambs and head.
D. Use VaproLiqui-Flash™ to adhere the VaproFlashing™ into the rough opening, coating the rough
opening at the 2 ¾ inch (70 mm) overlap before applying the VaproFlashing™. Alternatively
VaproBond™ Flashing maybe substituted for VaproLiqui-Flash™ as the bonding material.
E. For the VaproFlashing™ SA Self-Adhered flashing remove release film, align flashing membrane
and apply pressure to ensure positive contact. Roll Lap seams to ensure adhesion. Provide l ap
seams in singled fashion, to shed water.
F. VAPROLIQUI-FLASH VAPOR PERMEABLE WATER RESISTIVE FLASHING FOR ROUGH
OPENINGS
1. Download Installation Instructions at http://vaproshield.com/public-documents/installation-
instructions.
2. Liquid-applied window and door flashing shall be VaproLiqui-Flash™ by VaproShield, a
liquid-applied vapor permeable air barrier flashing material with resistance to moisture and
air leakage properties compatible with the primary weather resistant air barrier membrane.
3. Apply a 12-15 wet mil (0.030-0.038 mm) coating onto the installed VaproFlashing SA™ Self-
Adhered flashing or VaproFlashing™, 1 inch (25.4 mm) onto the face continuing into the
rough opening, covering the 2 ¾ inch (70 mm) VaproFlashing SA™ Self-Adhered flashing
or VaproFlashing™ and the remaining exposed rough opening surface.
G. THROUGH-WALL FLASHING MEMBRANE VAPRO-SS FLASHING VAPOR IMPERMIABLE
FLASHING
1. Download Installation Instructions at http://vaproshield.com/public-documents/installation-
instructions.
2. Apply through-wall self-adhered flashing membrane along the base of masonry veneer walls
and over shelf angles as detailed.
a. Press membrane firmly into place, overlap minimum 3 inches (76 mm) at all laps.
Promptly roll all surfaces using a hand roller to ensure good adhesio n.
b. Applications shall form a continuous flashing membrane and shall extend up a
minimum of 6 inches (15 cm) up the back-up wall.
c. Seal the top edge of the membrane where it meets the substrate using
VaproBond™. Trowel-apply a feathered edge to seal termination to shed water or
install VaproTermination Bar and sealant at the top edge.
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d. Install through-wall flashing membrane 1/2 inch (13 mm) from outside edge of
veneer. Provide “end dam” flashing as per brick industry standards.
SPEC WRITERS NOTE: Rough opening flashing system includes two components. Part I: VaproFlashing
SA™ Self-Adhered flashing and Part II: VaproLiqui-Flash™ or as Alternates, Vapro-SS Flashing™ or
VaproBond™ Flashing. Vapro-SS Flashing™ and VaproBond™ Flashing are optional replacements for Part
II flashing system or in addition to VaproLiqui-Flash.
H. OPTIONAL VAPROBOND™ FLASHING WATER IMPERMEABLE LOW VAPOR PERMEANCE
FLASHING FOR ROUGH OPENINGS
1. Fluid applied membrane for window and door flashing shall be Vapro Bond™ Flashing by
VaproShield, a low vapor permeable, impermeable air and water barrier flashing material,
replaces VaproLiqui-Flash.
2. Apply VaproBond™ Flashing, 1 inch (25 mm) onto the face continuing into the rough
opening, covering the 2 ¾ inch (70 mm) VaproFlashing™ SA Self-Adhered flashing and the
exposed rough opening surface. Not recommended for wood framing.
I. OPTIONAL VAPRO-SS FLASHING VAPOR IMPERMIABLE FLASHING FOR ROUGH OPENINGS
3. Self-Adhered stainless steel membrane for window and door flashing shall be Vapro-SS
Flash™ by VaproShield, an impermeable air and water barrier flashing material , replaces
VaproLiqui-Flash™. Not recommended for wood framing.
4. Apply Vapro-SS Flash™, 1 inch (25.4 mm) onto the face continuing into the rough opening,
covering the 2 ¾ inch (70 mm) Vapro-SS Flash™ and the exposed rough opening surface.
Roll installed flashing immediately after installation with roller to insure positive contact and
adhesion with substrate.
J. OPTIONAL PREFORMED WINDOW AND DOOR CORNERS
1. Preformed window and door flashing membrane shall be 3D Factory Formed Corners by
VaproShield an 18 inch x 18 inch (457.2 mm x 457.2 mm) preformed 90 ° inside corner
membrane with the same vapor permeance and resistance to air leakage physical properties
as the primary air barrier membrane.
K. OPTIONAL WATER-RESISTIVE FLASHING AND PENETRATION TAPES
1. Tapes shall be VaproTape™ by VaproShield: Black, butyl, UV stable, single sided, moisture-
resistant flexible tape with adhesive backing having the following properties:
a. VaproTape™ (Single-Sided): 2 inch (5.08 cm), 3 inch (7.62 cm) or 4 inch (10.16 cm)
wide seam tape
3.06 HORIZONTAL INSTALLATION
A. For horizontal applications, align sheets and begin installation of mechanically attached water-
resistive weather barrier membrane at bottom or lowest point of wall.
B. To avoid misalignment of subsequent applications, it is recommended to pre-mark or "Snap" a level
line to work from.
C. Measure and pre-cut into manageable sized sheets to suit the application conditions.
D. Allow for excess material at bottom of wall to accommodate tie-ins and connections to adjacent
surfaces.
E. Align and position mechanically attached water-resistive weather barrier membrane. Provide
minimum 6 inch (152 mm) overlap at the horizontal sides, remove release film of the integrated tape
and press firmly into place. Stagger all vertical end lap seams and overlaps a minimum of 12 inch
(305 mm). Roll lapped Integrated Tape seams with roller to ensure contact and adhesion.
F. Add a continuous bead of VaproBond™ adhesive sealant between the vertical overlapping joints and
roll the overlapping surfaces to insure continuous contact and adhesion.
G. Install subsequent sheets of mechanically attached water-resistive weather barrier membrane in
overlapping weatherboard format. Ensure sheets lay smooth and flat to surfaces. Roll lapped
Integrated Tape seams with roller to ensure contact and adhesion.
H. Refer to http://vaproshield.com/installation/instructions for the most current and complete installation
instructions.
3.07 OPTIONAL BATTENS, VENTILATION STRIPS, SHIMS OR MAT FOR RAIN SCREEN CLADDING
SYSTEMS
A. Provide and install specified battens and ventilation strips under cladding systems.
B. Install horizontal starter strip or vent strip at base of wall, vertical battens and top vent strip, secure
into solid backing ready for installation of cladding system.
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C. Coordinate spacing of battens and vent strips to accommodate cladding system.
D. Coordinate spacing of VaproShim SA™ Self-Adhered to accommodate cladding system
attachments.
E. Coordinate attachment of VaproMat™ to accommodate cladding system attachments.
3.08 FASTENING CLIPS AND MASONRY TIES
A. Install clips and masonry ties over primary self -adhered vapor permeable air barrier membrane.
B. Secure clips and masonry ties with corrosion-resistant, or stainless steel screws with gasketed
fasteners.
C. Consult VaproShield Technical Services for recommendations on appropriate masonry tie types and
methods to seal penetrations.
3.09 FIELD QUALITY CONTROL
A. Make notification when sections of work are complete to allow review prior to covering mechanically
attached water-resistive weather barrier membrane system , with the installation of the cladding.
B. Owner to engage independent consultant to observe substrate and membrane installation prior to
placement of cladding system(s) and provide written documentation of observations.
3.10 PROTECTION
A. Protect wall areas covered with mechanically attached water-resistive weather barrier membrane
from damage due to construction activities, high wind conditions, and extended exposure to
inclement weather.
B. Review condition of mechanically attached water-resistive weather barrier membrane prior to
installation of cladding. Repair, or remove and replace damaged sections with new membrane.
C. Recommend to cap and protect exposed back-up walls against wet weather conditions during and
after application of membrane, including wall openings a nd construction activity above completed
mechanically attached water-resistive weather barrier membrane installations.
D. Remove and replace water-resistive weather barrier membrane affected by chemical spills or
surfactants.
END OF SECTION
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