(Specifier Note: The purpose of this guide specification is to assist the specifier in correctly specifying flexible flashing products and their installation. The specifier needs to edit the guide specifications to fit the needs of each specific project. Contact a DuPontTM Product Representative to assist in appropriate product selections. Throughout the guide specification, there are Specifier Notes to assist in the editing of the file. The term Architect is used throughout these guide specifications, as a guide and may be edited to read “Design Professional”,” Engineer”, “Owner” or other appropriate designation as required for specific project.

References have been made within the text of the specification to MasterFormat 2004 Section numbers and titles, specifier need to coordinate this numbers and titles with sections included for the specific project. Brackets [ ]; “AND/OR”; and “OR” have been used to indicate when a selection is required.

This guide is for commercial flashing applications in conjunction with weather barrier assemblies. This high-performance flashing membrane is designed to help stop the passage of bulk water and airflow movement and is vapor non-permeable. This commercial flashing system offers protection for the building envelope by providing a water-resistant barrier at changes in direction or elevation and at transitions between different wall assembly materials. The commercial flashing system includes preformed inside corners, outside corners, and end dams.

This commercial flashing is specifically designed for through-wall flashing applications with masonry, concrete, gypsum, wood or metal substrates. Select the appropriate MasterFormat Section number and title that meets the needs of the project. When using this work result as a Masonry Accessory, the recommended number and title would fall in Division 04, for use as an accessory with other work results the Division 07 number and title may be more appropriate. )

SECTION 07 65 00

FLEXIBLE FLASHING

DuPontTM Thru-Wall Flashing

or

SECTION 04 05 23

MASONRY ACCESSORIES

DuPontTM Thru-Wall Flashing

PART 1 - GENERAL

1.1  SECTION INCLUDES

  1. High Performance Flashing Membrane
  2. DuPont™ Thru-Wall Surface Adhered Membrane with Integrated Drip Edge
  3. Preformed Inside Corners, Outside Corners, and End Dams
  4. Accessories

1.2  REFERENCES

  1. ASTM International
  2. ASTM C 920: Standard Specification for Elastomeric Joint Sealants
  3. ASTM D 146: Standard Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Waterproofing.
  4. ASTM D 412: Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension.
  5. ASTM D 471: Standard Test Method for Rubber Property-Effect of Liquids.
  6. ASTM D 624: Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers.

1.3  SUBMITTALS

  1. Refer to Section [01 33 00 Submittal Procedures] [Insert section number and title].
  2. Product Data: Submit manufacturer current technical literature for each type of product.
  3. Shop Drawings: Show location of each item and large-scale details.
  4. Samples: Each type of product specified. [4 inches by 4 inches] [Insert size].
  5. Quality Assurance Submittals

(Specifier Note: DELETE Design Data, Test Report submittal requirements when propriety specification is used and can be held. MAINTAIN Design Data, Test Report submittal requirement when other products may be submitted as substitutions.)

  1. Design Data, Test Reports: Provide manufacturer test reports indicating product compliance with indicated requirements.
  2. Manufacturer Instructions: Provide manufacturer’s written installation instructions.

1.4  QUALITY ASSURANCE

  1. Qualifications
  2. Installer shall have documented successful experience with installation of DuPont TM flashing system under similar conditions.
  3. Installation shall be in accordance with manufacturer’s installation guidelines and recommendations.
  4. Preinstallation conference: Conduct conference at project site.

(Specifier Note: Mock-ups are recommended for all projects using DuPont TM flexible flashings. Mock-up requirement will likely be included in the specification section for the wall cladding and/or windows. Include flashing as part of the required mock-up.)

1.5  DELIVERY, STORAGE AND HANDLING

  1. Refer to Section [01 60 00 Product Requirements] [Insert section number and title].
  2. Deliver flexible flashing materials and components in manufacturer’s original, unopened, undamaged containers with identification labels intact.
  3. Store flexible flashing materials as recommended by manufacturer.

1.6  PROJECT CONDITIONS

  1. Refer to Section [01 60 00 Product Requirements] [Insert section number and title].
  2. Do not apply flexible flashing on wet or damp surfaces.
  3. Apply to surfaces free of dirt, oils, lubricants and other debris.
  4. Install flexible flashing materials at temperatures above 32 degrees F.

PART 2 - PRODUCTS

(Specifier Note: Product information is proprietary to DuPont. If additional products are required for competitive procurement, contact DuPont for assistance.)

2.1  MANUFACTURER

  1. DuPont; 4417 Lancaster Pike, Chestnut Run Plaza 721, Wilmington, DE 19805; 1-800-44-TYVEK (8-9835); http://construction.tyvek.com

2.2  HIGH PERFORMANCE FLASHING MEMBRANE

A.  Thru-Wall Surface Adhered Membrane with Integrated Drip Edge.

  1. Basis of Design: Self-adhering flexible flashing membrane is based on DuPont Thru-Wall Flashing.
  2. Description: 40-mil composite flashing membrane. 25-mil top surface is comprised of DuPont’s ElvaloyÒ KEE polymer and elastomeric ingredients, reinforced with polyester fibers. 15-mils of butyl adhesive is applied to the bottom surface with a disposable silicone release sheet. 1½-inch of 25-mil top surface is without butyl adhesive to provide a sealant compatible drip edge.
  3. Color: gray
  4. Dimensions

1)  Width: [12 inches] [18 inches] [24 inches] [36 inches] [Insert custom width]

2)  Length: 75 feet

  1. Performance Characteristics
  2. Elongation: 175% (ASTM D412)
  3. Tensile Strength: 600 lbs/in min (ASTM D412)
  4. Tear Strength: 50 lbs/in min (ASTM D624)
  5. Low Temperature Flexibility: 0° F Pass (ASTM D146)
  6. Water Absorption: Less than 0.1% (ASTM D471)
  7. Compatible with Urethane and Silicone sealant.
  8. UV stable

2.3  PREFORMED CORNERS AND END DAMS

(Specifier Note: DELETE products not required for project.)

  1. Pre-formed Corners and End Dams: Standard three dimensional shapes as indicated on the Drawings to form a complete flashing system with preformed corners and end dams, provided by flashing sheet manufacturer.
  2. Surface Adhered: [External corners] [Internals corners] [End dams]

2.4  ACCESSORIES

  1. Primer:
  2. Provide flashing manufacturer recommended primer to assist in adhesion between substrate and flashing

(Specifier Note: Products listed below are only recommendations for inclusion when required and should be EDITED for specific project.)

  1. Products:
  2. 3M High Strength 90
  3. Denso Butyl Spray

(Specifier Note: SIA product meets California VOC requirements as of this printing.)

  1. SIA 655
  2. Permagrip 105
  3. Primers recommended by the flashing manufacturer
  4. Sealants

(Specifier Note: Sealants compatible with flexible flashing may be specified in this section or in Division 07 sealants section. MAINTAIN first paragraph and DELETE remaining paragraphs when sealants are specified in Division 07.)

  1. Refer to Section [07 92 00 Joint Sealants] [Insert section number and title].

OR

  1. Provide sealant that complies with ASTM C 920, elastomeric polymer sealant to maintain watertight conditions.

(Specifier Note: Sealant products listed below have been tested for compatibility and intermittent contact with DuPont™ flexible flashing. EDIT for specific project as appropriate when sealants are specified within this section.)

3.  Urethane Modified Acrylic Products:

a. DuPont™ Commercial Sealant

  1. Silicone Products:
  2. Dow Corning® - [790; 1200 Prime Coat] [791; 1200 Prime Coat] [795; 1205 Prime Coat]
  3. GE Silicones - Silpruf; SS4179
  4. Pecora – [890] [895]
  5. Tremco – Spectrum 2; #20
  6. Sealants recommended by the flashing manufacturer.
  7. Urethane Products:
  8. SIKA – Sikaflex-la; #449
  9. Sonneborn – Sonolastic NP1; #733

c.  Tremco – [Dymonic; #6 or #17] [Dymeric 511; #17]

(Specifier Note: COORDINATE fasteners and seam tape listed below with weather barrier sections and installations below. DELETE when not used in PART 3 or when specified in weather barrier section.)

  1. Fasteners:

(Specifier Note: Fasteners are dependent upon substrate construction. More than one type of fastener may be required on a single project, REVIEW construction conditions and DELETE fasteners that are unnecessary.)

  1. (Specifier Note: Steel Frame Construction) Tyvek® Wrap Cap Screws, as manufactured by DuPont: 1-5/8 inch rust resistant screw with 2-inch diameter plastic cap fasteners.

AND/OR

2.  (Specifier Note: Wood Frame Construction) Tyvek® Wrap Caps, as manufactured by DuPont: [#4 nails with large 1-inch plastic cap fasteners] [1-inch minimum plastic cap staple with a 7/8” minimum staple length].

AND/OR

  1. (Specifier Note: Masonry Construction) Masonry tap-con fasteners with Tyvek® Wrap Caps as manufactured by DuPont: 2-inch diameter plastic cap fasteners.
  2. Seam Tape: DuPont™ Tyvek® Tape as manufactured by DuPont™.

(Specifier Note: DELETE Description when propriety specification for seam tape is used and can be held.)

  1. Description: Pressure sensitive, polypropylene substrate with acrylic based adhesive.
  2. Sealing Membrane: DuPont™ StraightFlash™ as manufactured by DuPont for sealing at terminations and penetrations.

(Specifier Note: DELETE Description when propriety specification for sealing membrane is used and can be held.)

  1. Description: Textured polyethylene laminate with butyl based adhesive.

PART 3 - EXECUTION

3.1  EXAMINATION

  1. Verify substrate and surface conditions are in accordance with flexible flashing manufacturer recommended tolerances prior to installation.
  2. Review requirements for sequencing of installation of flexible flashing assembly. Verify flexible flashing will be continuously supported by substrate, and not span any gaps or voids in excess of ½-inch.

3.2  FLASHING INSTALLATION

  1. Apply primer per manufacturer’s written instructions.
  2. Install preformed corners and end dams bedded in sealant in appropriate locations along wall.
  3. Starting at a corner, remove release sheet and apply membrane to primed surfaces in lengths of 8 to 10 feet.
  4. Extend membrane through wall and leave ¼ inch minimum exposed to form drip edge.
  5. Roll flashing into place. Ensure continuous and direct contact with substrate.
  6. Lap ends and overlap preformed corners 4 inches minimum. Seal all laps with sealant.

(Specifier Note: DELETE paragraph below if a metal drip edge is not required.)

  1. Trim exterior edge of membrane 1-inch and secure metal drip edge per manufacturer’s written instructions.

(Specifier Note: DELETE option below when not required for project.)

  1. Terminate membrane on vertical wall. [Terminate into reglet, counterflashing or with termination bar.]
  2. Apply sealant bead at each termination.

(Specifier Note: DELETE remaining installation paragraphs below not required for project. Coordinate with accessories named in Part 2 above.)

3.3  THRU-WALL FLASHING / WEATHER BARRIER INTERFACE AT BASE OF WALL

  1. Overlap thru-wall flashing with weather barrier by 6-inches.
  2. Mechanically fasten bottom of weather barrier through top of thru-wall flashing.
  3. Seal vertical and horizontal seams with tape or sealing membrane.

3.4  THRU-WALL FLASHING / WEATHER BARRIER INTERFACE AT SHELF ANGLE

  1. Seal weather barrier to bottom of shelf angle with sealing membrane.
  2. Apply thru-wall flashing to top of shelf angle. Overlap thru-wall flashing with weather barrier by 6-inches.
  3. Seal bottom of weather barrier to thru-wall flashing with tape or sealing membrane.

3.5  THRU-WALL FLASHING / WEATHER BARRIER INTERFACE AT WINDOW HEAD

  1. Cut flap in weather barrier at window head.
  2. Prime exposed sheathing.
  3. Install lintel as required. Verify end dams extend 4 inches minimum beyond opening.
  4. Install end dams bedded in sealant.
  5. Adhere 2 inches minimum thru-wall flashing to wall sheathing. Overlap lintel with thru-wall flashing and extend ¼ inch minimum beyond outside edge of lintel to form drip edge.
  6. Apply sealant along thru-wall flashing edges.
  7. Fold weather barrier flap back into place and tape bottom edge to thru-wall flashing.
  8. Tape diagonal cuts of weather barrier.
  9. Secure weather barrier flap with fasteners.

3.6  PROTECTION

  1. Protect installed flexible flashing from damage during construction.

END OF SECTION

DISCLAIMER:
DuPont Guide Specifications have been written as an aid to the professionally qualified Specifier and Design Professional. The use of this Guideline Specification requires the sole professional judgment and expertise of the qualified Specifier and Design Professional to adapt the information to the specific needs for the Building Owner and the Project, to coordinate with their Construction Document Process, and to meet all the applicable building codes, regulations and laws. DUPONT EXPRESSLY DISCLAIMS ANY WARRANTY, EXPRESSED OR IMPLIED, INCLUDING THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE FOR THIS GUIDE.

Project Name/Project Number/10-Nov-0823-Sep-0813-Nov-07 (04 05 23) 07 65 00 - 1 (Masonry Accessories) Flexible Flashing

DuPont™ Thru-Wall Flashing