THERMAL AND AIR BARRIER WALL SYSTEM
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07 42 65
THERMAL AND AIR BARRIER WALL SYSTEM

THERMAL AND AIR BARRIER WALL SYSTEM
DISCLAIMER: The manufacturer has reviewed the product information contained in this short form specification. The information is organized and presented to assist the specification writer working on a construction project to select the appropriate products and to save time in writing the project specification Section.
The specification writer is responsible for product selection as well as the use and application of this information, and should contact
PART 1 – GENERAL
1.1 SUMMARY
A. Provide a thermal and air barrier wall system for exterior block and brick wall assemblies. Work includes:
1) Provide exterior wall insulation.
2) Provide specified tape for sealing all insulation joints.
B. Related Sections:
1) Section 04085 Thermal Clip Pos-I-Tie masonry anchor assemblies.
1.2 REFERENCES
A. Reference standards:
1) ASTM International (ASTM): a) ASTM C203-[99]: Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal
Insulation. b) ASTM C518-[04]: Test Method for Steady-State Heat Flux Measurements and Thermal
Transmission Properties by Means of the Heat Flow Meter Apparatus. c) ASTM C 578: Specification for Extruded Polystyrene Thermal Insulation Board. d) ASTM D1621-[04a]: Test Method for Compressive Properties of Rigid Cellular Plastics. e) ASTM D1622-[03]: Test Method for Apparent Density of Rigid Cellular Plastics. f) ASTM E84-[05]: Test Method for Surface Burning Characteristics of Building Materials. g) ASTM E96/E96M-[05]: Test Method for Water Vapor Transmission of Materials. h) ASTM E 2357-[05]: Test Method for Determining Air Leakage of Air Barrier Assemblies.
2) National Fire Protection Association (NFPA): a) NFPA 285 [2006]: Standard Method of Test for the Evaluation of Flammability Characteristics of
Exterior Wall Assemblies Containing Combustible Components Using the Intermediate-Scale,
Multistory Test Apparatus.
1.3 SYSTEM DESCRIPTION
A. Furnish and install an exterior wall system that effectively controls thermal, and air performance and provides continuity of the building envelope enclosure. The system shall include the following:
1) Insulated sheathing secured to the exterior of the load bearing block or concrete wall.
2) Attachment of the rigid insulation with proper wall ties.
3) Joint, penetration and gap sealing material for sealing component joints, penetrations through the wall system and gaps between the building envelope enclosure components and wall opening frames.
B. Performance Characteristics:
1) Thermal performance: a) Exterior insulation: ASTM C578, Stabilized R-value of 5.6 per inch of thickness. [50 year thermal warranty].
C. Code Compliance: Exterior wall system and component materials shall comply with the following requirements:
1) Exterior Insulation: a) Flame Spread Index 0 and 155 Smoke Developed Index classified at Max. thickness per UL 723 criteria or ASTM E84 criteria. b) Fire Performance Evaluation as a component of an NFPA 285 approved wall assembly per the requirements of the International Building Code.
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THERMAL AND AIR BARRIER WALL SYSTEM

THERMAL AND AIR BARRIER WALL SYSTEM
2) System complies with NFPA 285 [06]: Standard method of Testing for the Evaluation of Flammability
Characteristics of Exterior Wall Assemblies containing combustible components using the Intermediate
Scale, Multi-Story Test Apparatus.
D. Reports:
1) Submit Test Reports, summarized by Manufacturer of material(s), verifying qualities of thermal [and air barrier] wall system components meet or exceed specified requirements. a) Include evidence of ASTM E2357 air barrier system testing.
E. Samples: Submit following material samples.
1) Insulation panel, 12" square with ship lapped edge on sample.
2) Insulation fasteners/washers and joint flashing tape, one each.
F. Submit Material Safety Data Sheets (MSDS) for thermal [and air] barrier wall system components.
1.4 QUALITY ASSURANCE
A. Pre-installation Meeting: Prior to commencement of application of the rigid foam review and document methods and procedures related to installation, including the following:
1) Participants: Authorized representatives of the Contractor, [Construction Manager,] [Owner,] Architect,
[Engineer,] Applicator, Independent Inspector and Manufacturer.
2) Review masonry wall assemblies for potential interference and conflicts and coordinate layout and support provisions for interfacing work.
3) Review rigid insulation methods and procedures related to application, including manufacturer's guidelines.
4) Review construction schedule and confirm availability of products, applicator personnel, equipment and facilities.
5) Review governing regulatory requirements, and requirements for insurance and certificates as applicable.
6) Review field quality control procedures.
1.5 DELIVERY, STORAGE AND HANDLING
A. Deliver Thermal materials in Manufacturer's unopened bundles, fully identified by name, brand, type and grade. Exercise care to avoid damage during unloading, storing and installation.
B. Store, protect and handle Thermal Wall System materials in accordance with the Manufacturer’s recommendations to prevent damage, contamination and deterioration. Keep materials free of dirt and other foreign matter.
1.6 WARRANTY
A. Submit the following warranties:
1) Exterior insulation warranty: [50 year thermal warranty].
2) Flashing Tape: Limited Warranty
PART 2- PRODUCTS
2.1 FOAM-PLASTIC BOARD INSULATION
A. Extruded-Polystyrene Board Insulation: ASTM C-578, of type and density indicated below, with maximum
Flame-spread and smoke-developed indexes of 0 and 155, respectively:
1) Basis of Design Manufacturers: Subject to compliance with requirements, provide STYROFOAM* Ultra SL” as manufactured by The Dow Chemical Company.
2) Type IV, 1.60 lbs/cu.ft., unless otherwise indicated.
3) Aged R-value: 5.6 minimum per inch thickness.
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THERMAL AND AIR BARRIER WALL SYSTEM
4) Water absorption: Max. 0.1% by volume (ASTM C 272-91 (96).
5) Total thickness 2” nominal (R-12) single layer 4’ X 8 with ship-lapped edges on the 8’ lengths.
2.2 SPRAYED POLYURETHANE FOAM INSULATION - (sealing penetrations in the insulation envelope and the area between the roof/wall juncture as well as the flutes of the metal deck.)
A. Closed-Cell Polyurethane Foam Insulation: ASTM C 1029, Type II, with maximum flame-spread and smokedeveloped indexes of 75 and 450, respectively, per ASTM E 84.
1) Manufacturers: Subject to compliance with requirements, provide the following: a) The Dow Chemical Company; Froth-Pak. b) Manufacturer/product that complies with current Building Code for specific application indicated.
2) Minimum density of 1.5lb/cu. Ft., thermal resistance of 6.2 at 75 deg F.
3) Shall have passed NFPA 28 6 “Standard Method of Fire Tests for Evaluating Contribution of Wall and
Ceiling Interior Finish to Room fire Growth,” for use without a 15 minute thermal barrier and be in
Compliance with current Building Code.
2.3 INSULATION JOINT TAPE AND AIR SEAL FOAM
A. Insulation Flashing Tape: Provide insulation manufacturer’s recommended board joint tape for sealing joints, seams and veneer tie penetrations through the insulation layer.
1) Acceptable Products: The Dow Chemical Company “WEATHERMATE™ Straight Flashing 4 inch width with butyl rubber adhesive
B. Wall Opening Flashing: Provide insulated sheathing manufacturer’s recommended flashing sealing window and door wall openings.
1) Acceptable Products: The Dow Chemical Company “WEATHERMATE™ Straight Flashing 6 inch and 9 inc h”, with butyl rubber adhesive, at straight opening heads, jambs and sills.
2) When greater widths are required for through wall flashings butyl rubber adhesive is recommended.
C. Penetration Filler: Provide insulated sheathing manufacturer’s recommended polyurethane foam for sealing penetrations of insulated sheathing.
1) Acceptable Products: The Dow Chemical Company “GREAT STUFF PRO™ Gaps & Cracks” singlecomponent polyurethane insulating foam sealant.
2) Acceptable Products: The Dow Chemical Company “GREAT STUFF PRO™ Window & Door” singlecomponent polyurethane low-pressure foam sealant.
D. Gap Air Infiltration Filler: Two Component, Quick Cure Polyurethane Foam:
1) Acceptable Products: The Dow Chemical Company FROTHPAK™ Foam Insulation two-component, quick-cure polyurethane foam. a) NFPA 286 Approval for Exposed use to the interior of the building without the need for a 15-min thermal barrier. b) ASTM E-84 Class A
PART 3 – EXECUTION
3.1 EXAMINATION
A. Examine substrates and installation conditions for compliance with requirements for installation conditions affecting performance of the work.
1) Verify that all mortar joints are smooth and block is free of mortar build up in order to apply the rigid foam insulation to the outside surface of the block.
2) Do not proceed with thermal and air barrier wall system installation until unsatisfactory conditions have been corrected.
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B. Installation constitutes acceptance of existing conditions and responsibility for satisfactory performance.
3.2 INSULATION INSTALLATION
A. Install insulation in accordance with manufacturer's recommendations.
1) Install insulation panels with the ship lapped edges running horizontally with two-piece masonry wall ties specified in Division 04 Section “Unit Masonry.” Drill pilot holes for CMU or Concrete substrate installation.
2) Wall ties shall be inserted through insulation board according to manufacturer’s instructions. Do not allow shaft of fastener to “drift” or “wobble”. Rubber washer on back of pintle shaft is intended to seal shaft hole in insulation. Start wall ties 8” above horizontal joints and 8” over from the vertical joints to insure the ties do not penetrate through the insulation board joints. This will allow uninterrupted taping for the joints of insulation board. a) Should the tie shaft hole through foam board insulation be enlarged, cover exposed portions of hole with butyl tape or specified spray polyurethane foam.
B. TAPING JOINTS
1) Tape all joints of rigid cavity insulation including joints with adjacent material other than extruded polystyrene and adjacent construction with minimum of 4 inch wide butyl-based tape recommended by insulation manufacturer. Tape should extend minimum of 2” on all adjacent surfaces.
2) Install flashing joint tape at end and edge joints with sufficient hand pressure to ensure seal. Make sure insulation is dry and free from dust before applying the tape.
3) Install flashing tape behind wall tie and mechanical fastening assemblies for rain screen claddings.
4) Seal sheathing joints and penetrations of sheathing in accordance with sheathing manufacturer's joint and penetration sealing recommendations.
5) Execution of cavity wall insulation installation, taping of joints, transition strips, and filling of miscellaneous holes and voids shall result in establishment of an uninterrupted, monolithic insulation plane that shall create the building envelope air barrier.
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THERMAL AND AIR BARRIER WALL SYSTEM