SECTION 07 2719
PLASTIC SHEET AIR BARRIERS
EDIT NOTES:
1. THIS SECTION SHOULD BE USED TOGETHER WITH SECTION 09 2423, CEMENT
PLASTER AND METAL LATH AS A WATER-RESISTIVE BARRIER IN
CONFORMANCE TO CBC 2510.6. SECTION 09 2423 SPECIFIES THE SECOND
LAYER, ASPHALT SATURATED KRFT PAPER.
2. THIS SECTION MAY BE USED BEHIND OTHER CLADDING MATERIALS,
VERIFY WITH MANUFACTURER IF PROPOSED USE IS SUITABLE TO THEIR
PRODUCT.
PART 1 - GENERAL
1.01
SUMMARY
A.
B.
Section Includes:
1.
Mechanically attached permeable flexible plastic sheet air barriers.
2.
Flexible flashing of openings, penetrations, joints, and terminations of exterior
walls and taping of seams.
Related Requirements:
EDIT NOTE: DELETE RELATED SECTIONS NOT APPLICABLE TO
PROJECT.
1.
Section 05 4100 – Structural Metal Stud Framing.
2.
Section 06 1000 - Rough Carpentry.
3.
Section 07 6000 – Flashing and Sheet Metal.
4.
Section 07 9200 – Joint Sealants.
5.
Section 08 4113 - Aluminum Entrances and Storefronts.
6.
Section 08 4413 - Glazed Aluminum Curtain Walls.
7.
Section 08 511 3- Aluminum Windows.
8.
Section 08 5116 – Aluminum Windows with Louvers.
9.
Section 08 5123 – Steel Windows.
10.
Section 09 2423 – Cement Plaster and Metal Lath.
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-1
1.02
REFERENCES
A.
B.
ASTM International:
1.
ASTM E84 - Standard Test Method for Surface Burning Characteristics of
Building Materials.
2.
ASTM E1677 - Standard Specification for an Air Barrier (AB) Material or
System for Low-Rise Framed Building Walls.
3.
ASTM E2178 – Standard Test Method for Air Permeance of Building
Materials.
International Code Council (ICC):
1.
1.03
ICC-ES Evaluation Reports.
SUBMITTALS
A.
Product Data: Submit manufacturer's product data for each material and component
proposed for installation.
B.
Shop Drawings: Dimensioned plans and elevations indicating:
1.
Complete information as to size and location of openings, sleeves, conduits,
ducts, boxes, inserts, attachments, and structural interferences.
2.
Layout of air barrier showing sheet lapping, cutting, flashing and taping, with
references to enlarged details.
C.
Installation Instructions: Submit detailed manufacturer’s installation instructions.
D.
Material Samples: Submit minimum 8-1/2-inch by 11-inch samples of air barrier, and 12
inch long flashing.
E.
Test Reports: Submit Test Reports showing performance characteristics equaling or
exceeding those specified.
F.
Evaluation Reports: Submit ICC-ES Evaluation Report demonstrating conformance of
plastic sheet air barrier to CBC 1404.2, for use as water-resistive barrier.
G.
Qualification Statements:
1.
1.04
Installer: Statement from plastic sheet air barrier manufacturer indicating
installer is approved, certified, or has been trained for the installation of their
products.
QUALITY ASSURANCE
A.
Manufacturer:
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-2
B.
1.
Plastic sheet air barrier components and accessories shall be from a single
source.
2.
Manufacturer shall have a minimum of five years of continued experience in the
manufacture of the specified products.
Installer:
1.
Minimum five years in the installation of air/weather barriers.
2.
Trained or certified by manufacturer for the installation of their products.
C.
Mock-up: Refer to Section 09 2423, Cement Plaster and Metal Lath.
D.
Pre-Installation Conference: CONTRACTOR shall coordinate and conduct preinstallation conference in accordance to Section 01 3119, Project Meetings, to review the
progress of construction activities related to the installation of plastic sheet air barrier.
In addition to the conference attendees listed on Section 01 3119, plastic sheet air barrier
installer and manufacturer technical representative shall attend pre-installation
conference.
1.05
DELIVERY, STORAGE AND HANDLING
A.
Deliver materials to the job site in undamaged and original packaging.
B.
Store materials in a clean, dry, protected location and within temperature range required
by plastic sheet air barrier manufacturer. Protect stored materials from direct sunlight.
C.
Handle materials in accordance with Manufacturer’s recommendations.
1.06
WARRANTY
A.
Provide a ten year manufacturer’s standard material warranty for replacement of
plastic sheet air barriers that fail due to material defects.
B.
Installation Warranty: Provide a two year installation warranty for the plastic sheet air
barrier, including accessories, against loss of water-tight seal and loss of attachment.
C.
Warranty shall start on the day of Substantial Completion.
PART 2 - PRODUCTS
2.01
MATERIALS
A.
Manufacturer and Products:
1.
DuPont (E. I. du Pont de Nemours and Company): Tyvek CommercialWrap.
2.
Polymer Group Inc., TyparMetroWrap.
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-3
3.
B.
2.02
Equal.
Properties:
1.
Plastic sheet air barrier shall be Type I in accordance to ASTM E1677.
2.
Air Permeance: shall not exceed 0.004 cfm/ft2, under a pressure differential of
0.3 in w.g. (1.57 psf) (0.02 L/m2 at 75 Pa), when tested in accordance with
ASTM E2178.
3.
Flame-spread and smoke-developed indexes of less than 25 and 450,
respectively, when tested in accordance to ASTM E84.
MISCELLANEOUS MATERIALS
A.
Flashing: Self-adhesive butyl rubber compound, bonded to a high-density polyethylene
film, aluminum foil, or spunbonded polyolefin to produce an overall thickness of not less
than 0.025 inch (0.6 mm).
1.
DuPont (E. I. du Pont de Nemours and Company); FlexWrap and StraightFlash.
2.
Polymer Group Inc.; Flashing Flex and Flashing AT.
3.
Equal.
B.
Fasteners: Manufacturer approved fasteners.
C.
Tape: Three inch wide seam tape. Pressure-sensitive plastic tape recommended by air
barrier manufacturer for sealing joints and penetrations in air barrier.
D.
Sealants and Adhesive Primers: Compatible with plastic sheet air barrier and flashings
system and approved by OWNER’s Office of Environmental Health and Safety (OEHS).
1.
Sealant: Dow Corning 732.
2.
Spray Adhesive: Design Polymerics DP77.
3.
Equal.
PART 3 - EXECUTION
3.01
EXAMINATION
A.
Examine substrates, areas and conditions under which plastic sheet air barrier will be
installed.
B.
Verify that substrate to receive air barrier has been completed and inspected before
commencement of work.
C.
For the installation of flashing and tape, surface shall be smooth, clean, dry and free from
voids, loose substrate, protrusions, or any material that would hinder adhesion.
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-4
3.02
INSTALLATION
A.
Install plastic sheet air barrier in accordance to manufacturer’s installation guidelines,
providing continuity throughout exterior walls. Install plastic sheet air barrier with
drainage plane surface pattern in vertical position for proper drainage.
B.
Install plastic sheet air barrier starting from the bottom of the building up to ensure
proper overlapping of vertical and horizontal seams. Upper layer of plastic sheet air
barrier shall overlap bottom layer by a minimum of six inches. Plastic sheet air barrier
shall extend over the weep screed by two inches and be taped down.
C.
Secure plastic sheet air barrier by fastening into studs at 12 to 18 inches on center
vertically.
D.
Unroll plastic sheet air barrier directly over windows and doors rough openings. Do not
install fasteners within six inches of the sills and jambs of the openings and within nine
inches of the header, plastic sheet air barrier shall be fastened at these locations during
flashing installation.
E.
Horizontal joints shall be overlapped a minimum of six inches with upper courses
overlapping lower courses in water-shedding fashion. Vertical seams shall be
overlapped a minimum of six inches. Overlap corners of building a minimum of 12
inches.
F.
Tape vertical and horizontal seams using adhesive tape recommended by manufacturer.
Seal tears and cuts with adhesive tape as recommended by manufacturer.
G.
Place patch or strip of self-adhered flashing over plastic sheet air barrier where base
plates, metal channels, z-girts, or other hardware will be installed.
3.03
FLASHING
A.
Cut air barrier from door and window openings along jambs and sill. Cut a header flap
at 45 degree angle to expose eight inches of plastic sheet air barrier to allow for head
flashing installation. Install sill flashing per manufacturer instructions, overlapping up
the jambs a minimum of six inches on each side.
B.
Wrap flashing around interior jamb, wall face and exterior jamb, overlapping the vertical
portion of the sill flashing by at least two inches.
C.
Adhere flashing to the head following manufacturer’s instructions. Flashing shall wrap
jamb flashings by a minimum of two inches.
D.
Flash piping, conduit, duct and similar penetrations through walls, and flashing ledgers
and sills as recommended by manufacturer.
3.04
FIELD QUALITY CONTROL
A.
Manufacturer’s technical representative shall inspect the work and submit a statement
indicating that the installation has been done in conformance to manufacturer’s
installation instructions.
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-5
3.05
CLEANING
A.
3.06
Remove rubbish, debris, and waste material and legally dispose of off the Project site.
PROTECTION
A.
Protect the Work of this section until Substantial Completion.
END OF SECTION
PROJECT NAME
SCHOOL NAME
03/12/2015
PLASTIC SHEET AIR BARRIERS
07 2719-6