DuPont ™ Tyvek ® CommercialWrap ® ■ DuPont ™ FlexWrap ™ ■ DuPont ™ StraightFlash ™ INSTALLATION GUIDELINES Non-Flanged Aluminum window in commercial brick wall construction with lintel AFTER DuPont ™ Tyvek ® CommercialWrap ® air and water resistive barrier is installed. STEP 1 A. Cut rough opening in sheathing for window. Ensure that sheathing is cut flush with, or slightly below the sill framing to allow for positive drainage. STEP 2 A. Wrap wall as shown in Installation Guidelines for DuPont ™ Tyvek ® CommercialWrap ® that can be found at www.Construction.Tyvek.com. These are general guidelines for flashing standard aluminum, non-flanged windows in commercial building with steel or wood framing using a drainage method. Refer to architect and window manufacturer for project specific details. GENERAL INSTRUCTIONS: • DuPont ™ FlexWrap ™ and DuPont ™ StraightFlash ™ should be installed on clean, dry surfaces. Wipe surfaces to remove moisture, dirt, grease and other debris that could interfere with adhesion. • Apply pressure along entire surface for a good bond. • DO NOT STRETCH DuPont™ FlexWrap™ WHEN INSTALLING along sills or jambs. DuPont™ FlexWrap™ is only intended to be stretched when covering corners or curved sections • Remove all wrinkles and bubbles by smoothing surface and repositioning as necessary. • DuPont ™ FlexWrap ™ and DuPont ™ StraightFlash ™ performs best when installed at temperatures above 40°F (4°C). • Primer must be used whenever flashing is applied directly to the surface of glass fiber faced exterior gypsum board. • For additional guidelines and suggested caulks, please call 1-800-44-TYVEK (800-448-9835).
Non-Flanged Aluminum window in commercial brick wall construction with lintel AFTER DuPont™ Tyvek®
CommercialWrap® air and water resistive barrier is installed.
STEP 1A. Cut rough opening in sheathing for window. Ensure that
sheathing is cut fl ush with, or slightly below the sill framing to allow for positive drainage.
STEP 2A. Wrap wall as shown in Installation Guidelines for DuPont™
Tyvek® CommercialWrap® that can be found at www.Construction.Tyvek.com.
These are general guidelines for fl ashing standard aluminum, non-fl anged windows in commercial building with steel or wood framing using a drainage method. Refer to architect and window manufacturer for project specifi c details.
GENERAL INSTRUCTIONS:• DuPont™ FlexWrap™ and DuPont™ StraightFlash™ should be
installed on clean, dry surfaces. Wipe surfaces to remove moisture, dirt, grease and other debris that could interfere with adhesion.
• Apply pressure along entire surface for a good bond.
• DO NOT STRETCH DuPont™ FlexWrap™ WHEN INSTALLING along sills or jambs. DuPont™ FlexWrap™ is only intended to be stretched when covering corners or curved sections
• Remove all wrinkles and bubbles by smoothing surface and repositioning as necessary.
• DuPont™ FlexWrap™ and DuPont™ StraightFlash™ performs best when installed at temperatures above 40°F (4°C).
• Primer must be used whenever fl ashing is applied directly to the surface of glass fi ber faced exterior gypsum board.
• For additional guidelines and suggested caulks, please call 1-800-44-TYVEK (800-448-9835).
STEP 3A. Prepare the sill fl ashing by cutting a piece of DuPont™
FlexWrap™ that is at least twelve (12) inches longer than sill length. Use 7” DuPont™ FlexWrap™ for 2x4 framing and 9” FlexWrap™ for 2x6 framing.
B. Inspect installation surface to ensure surface is free of dirt or substances that could interfere with adhesion as well as any sharp protrusions.
Sill Length+ 12 inches
STEP 4A. Install the sill fl ashing. Remove 1st strip of release paper,
align the fl ashing with the interior edge of sill, and install into rough opening across sill and up jambs (min 6”). Apply working from the middle of the sill towards the sides. Secure DuPont™ FlexWrap™ tightly into the corners by fi rst working in along the sill before adhering up the jambs.
DO NOT STRETCH MATERIAL ALONG THE SILL OR JAMS
STEP 5A. Remove second half of the release paper.B. Fan DuPont™ FlexWrap™ at bottom corners and adhere onto
face of wall.C. Firmly press sill fl ashing to ensure full adhesion on all surfaces.
Eliminate wrinkles and bubbles by smoothing surface and repositioning as necessary.
STEP 6A. Use DuPont™ Tyvek® Wrap Cap fasteners to temporarily secure
the outer edge of the fl ashing at the lower corners. (Self tapping Wrap Cap screws are recommended for steel stud framing.) Flashing bond will strengthen over time.
STEP 7A. Wrap 9” DuPont™ StraightFlash™ into the rough opening at
each jamb and onto wall face. The fl ashing should align wth the interior edge of the jamb framing.
B. Jamb fl ashing should be long enough to overlap the sill fl ashing by 2” and be overlapped by future head fl ashing by 2”.
STEP 8A. Adhere DuPont™ FlexWrap™ to the head using the same
installation process as shown in steps 6 and 7 for the sill fl ashing. Make sure the DuPont™ FlexWrap™ is cut long enough to overlap the jamb fl ashing by at least 2 inches.
B. Use DuPont™ Tyvek® Wrap Cap fasteners to temporarily secure the outer edge of the fl ashing at the upper corners. (Self tapping Wrap Cap screws are recommended for steel stud framing.) Flashing bond will strengthen over time.
STEP 9.
A. Cut fl ap in the DuPont™ Tyvek® CommercialWrap®
B. Spray exposed sheathing with primer.C. Install lintel on masonry as required.– Primer recommendations:
• Denso butyl spray• 3M HS90• Perma grip 105• ITW TACC Sta’Put SPH• SIA 655 (approved for California)
C
A
B
STEP 10A. Install corrosion resistant metal pan with drip and soldered/
sealed end dams above lintel. Extend fl ashing beyond the end of lintel.
B. Install 9” wide strip of DuPont™ StraightFlash™ to bridge between the exterior sheathing and the metal pan fl ashing. Maintain a minimum of 3” contact between the DuPont™ StraightFlash™ and the primed exposed sheathing surface.
C. Cut a vertical slit in the DuPont™ StraightFlash™ to accommodate the vertical edge of the metal pan.
CA
B
STEP 11A. Install an additional layer of either 4” or 9” DuPont™
StraightFlash™ over the fi rst layer of DuPont™ StraightFlash™ if necessary to achieve the 3” minimum contact to the exposed exterior sheathing. The overlap should be a minimum of 1”.
B. Anchor the non-corrosive metal sill pan fl ashing to the wall and integrate to the DuPont™ Tyvek® weather resistant barrier with 4” DuPont™ StraightFlash™.
A
B
DuPont™ Tyvek® Tape(optional)
4” DuPont™
StraightFlash™
Metal SillPan Flashing
STEP 12A. Skip tape along bottom edge of cut in DuPont™ Tyvek® with
DuPont™ StraightFlash™ cut into 2-inch high by 4-inch long pieces installed at 8 inch on center.
B. Use 4-inch wide by 16-inch long pieces of DuPont™ StraightFlash™ at diagonal cut in DuPont™ Tyvek®.
4”
A
B
STEP 13A. Install remaining masonry with weeps along fl ashing.B. Install window per manufacturer’s instructions.C. Seal at perimeter of window. DO NOT SEAL ANY WEEPS OF
WINDOW FRAME.
C
JAM DETAIL
SILL DETAIL
HEAD DETAIL
B U I L D I N G C O D E R E P O R T SNational Evaluation Report NER-642. Meets the ASTM E1677 Type 1 Air Retarder when installed according to DuPont™ Tyvek® Weatherization System best practices. See installation instructions on label.
T E C H N I C A L S P E C I F I C A T I O N SDuPont™ Tyvek® used in construction products is made from 100% fl ash spunbonded high density polyethylene fi bers which have been bonded together by heat and pressure, without binders or fi llers, into a tough, durable sheet structure. Additives have been incorporated into the polyethylene to provide ultraviolet light resistance. DuPont suggests that Tyvek® be covered within four months (120 days) of installation.
DuPont™ FlexWrap™ and DuPont™ StraightFlash™ are made from a synthetic rubber adhesive and a laminate of polyethylene fi lm, elastic fi ber, synthetic rubber adhesive, polyurethane adhesive, and a top sheet of fl ash spunbonded high density polyethylene fi bers. Additives have been incorporated into these materials to help provide ultraviolet light resistance. DuPont suggests that DuPont™ Tyvek® be covered within four months (120 days) or DuPont™ Tyvek® CommericalWrap® be covered within nine months (270 days) of installation.
P R O D U C T R E P L A C E M E N TDuPont will replace any DuPont™ Tyvek® Weatherization System product damaged during installation by weather or normal handling if it is installed according to procedures published by DuPont. If you have any questions, call 1-800-44-TYVEK.
If DuPont™ FlexWrap™ and DuPont™ StraightFlash™ product fails to meet published material specifi cations at the time of shipment, or contains defects created during its production, DuPont will replace defective material at no charge.
W A R N I N GDuPont™ Tyvek® is slippery and should not be used in any application where it will be walked on. In addition, because it is slippery, DuPont recommends using kickjacks or scaffolding for exterior work above the fi rst fl oor. If ladders must be used, extra caution must be taken to use them safely by following the requirements set forth in ANSI Standards 14.1, 14.2 and 14.5 for ladders made of wood, aluminum, and fi berglass, respectively. DuPont™ Tyvek® is combustible and should be protected from a fl ame and other high heat sources. DuPont™ Tyvek® will melt at 275°F (135°C) and if the temperature of DuPont™ Tyvek® reaches 750°F (400°C), it will burn and the fi re may spread and fall away from the point of ignition. For more information, call 1-800-44-TYVEK.
DuPont™ FlexWrap™ and DuPont™ StraightFlash™ and their release paper are slippery and should not be walked on. Remove release paper from work area immediately. DuPont™ FlexWrap™ and DuPont™ StraightFlash™ will melt at temperatures greater than 250°F (121°C). DuPont™ FlexWrap™ and DuPont™ StraightFlash™ are combustible and should be protected from fl ame and other high heat sources. DuPont™ FlexWrap™ and DuPont™ StraightFlash™ will not support combustion if the heat source is removed. However, if burning occurs, ignited droplets may fall away from the point of ignition. For more information, call 1-800-44-TYVEK.
N O T ETo achieve greater potential energy savings and weather-resistance, any tears, breaks, holes, etc. created during normal construction should be repaired by taping or patching with DuPont™ Tyvek® weather resistive barriers. When installed in conjunction with other building materials, DuPont™ FlexWrap™ and DuPont™ StraightFlash™ should be properly shingled with these materials, such that water is diverted to the exterior of the wall system. DuPont™ Tyvek® products are weather resistive barriers not the primary water barrier (the outer facade is the primary barrier). Contamination of any DuPont™ Tyvek® weather resistive barriers and building papers with building site chemicals which increase their wettability (e.g., surfactants) will adversely affect their water-resistance and therefore, their contribution to the overall water-resistance of the wall system. DuPont™ Tyvek® CommercialWrap®, DuPont™ FlexWrap™ and DuPont™ StraightFlash™ are suggested for use as outlined in this brochure. DuPont™ FlexWrap™ and DuPont™ StraightFlash™ are not suggested for use on roof windows. For superior protection against bulk water penetration DuPont suggests a system combining a quality exterior facade, a good secondary weather resistive membrane and an exterior sheathing, appropriate fl ashing materials and details; and high quality windows and doors with particular attention to proper installation of each component. In a system where no exterior sheathing is used and DuPont™ Tyvek® is installed directly over the wall studs, exterior facade materials should be selected to ensure maximum protection against water intrusion. Careful workmanship and proper installation of each component is very important.
DuPont believes this information to be reliable and accurate. The information may be subject to revision as additional experience and knowledge is gained. It is the user’s responsibility to determine the proper construction materials needed. Because conditions are outside of our control, DUPONT MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, AND ASSUMES NO LIABILITY WHATSOEVER AS TO THE PERFORMANCE OF THE PRODUCTS FOR A PARTICULAR USE. This information is not intended to be used by others for advertising, promotion or other publication for commercial purposes.
