Install a piece of Tyvek® WRB to overlap the top edge of the DuPontSelf-Adhered Flashing Product. Seal sides and top with DuPont™ Tyvek® Tape.
To attach Tyvek® in wood frame construction, use DuPont™ Tyvek® Wrap Cap nails, DuPont™ Tyvek® Wrap Cap Staples, other cap staples for the Stinger™ Cap Stapler. DuPont™ Tyvek® Wrap Cap screws and 1-1/4” or 2” metal gasketed washers with screws should be used for steel frame construction.
Seal the the Tyvek® WRB at the interior foundation using DuPont™ Residential Sealant (or recommended sealant), DuPont™ StraightFlash™, or DuPont™ Flashing Tape. When sealing directly to concrete, wood, or other rough surfaces using DuPont Self-Adhered Products, use DuPont™ Adhesive/ Primer (or recommended primer).
When additional liquid holdout or hazardous chemical protection is required, Tyvek® can be extrusion-coated with polyethylene or laminated to a polyvinylidene chloride film. Tyvek® can be coated with a wide range of solvent and water-based solutions using conventional equipment.
Seal all seams with manufacturer recommended tape, including over the layers, the top and bottom edges, and the rough openings. It is also essential to seal the areas cut by subcontractors during the installation of the cladding.
Today, most house wrap manufacturers require their product to be installed with cap nails or cap staples. This change definitely slows down the process, but on the upside, capped fasteners hold house wrap to the wall up to 25 times better than staples.
Cut away the excess WRB and tape all seams. It is important to maintain the continuity of the DuPont™ Tyvek® WRB from bottom to top with proper shingling. Starting from the bottom of the structure, continue wrapping all the way up, overlapping the previous layer of Tyvek® WRB by a minimum of 6”.
Upon initial exposure, water will not penetrate Tyvek®. With time, or increased water pressure, drops of water will go through Tyvek®.
Tyvek®HomeWrap® exhibited nearly four times the vapor permeability of perforated house wrap, which can only allow vapor to pass through punched holes. The superior vapor permeability of Tyvek® HomeWrap® correlates to decreased wall cavity drying times, and a reduced potential for mold and wood damage.
DuPont™ Tyvek® is used to make pouches in a wide range of sizes and shapes in both self-sealing and heat-sealing styles to meet the needs of medical device and pharmaceutical manufacturers and healthcare providers.
Hot animal glue is an excellent adhesive for adhering Tyvek® to paperboard. Water-based synthetic lattices also bond Tyvek® to itself and a variety of substrates. Ethylene/vinyl acetate adhesives are especially useful, as are the acrylic pressure-sensitive adhesives.
A housewrap can eventually lose its repellency and allow water to soak through to underlying sheathing, etc. Some housewraps are specifically designed with coatings that resist surfactants. Drainable housewrap provides space to carry water away, mitigating surfactant-induced damage.
Tyvek® Housewrap should be secured with mechanical fixings through to the steel structure, where suitable drill-tip or self-tapping screws may be used. The screws must sit flush (not countersunk) and a rubber or EPDM washer should sit between the screw heads and the membrane to avoid water ingress.
Tyvek® Home Wrap®
The original house wrap, incorporating unique material science that helps keep air and water out, while letting water vapor escape.
Yes, DuPont Tyvek can be installed over old house wrap as long as the existing house wrap is Tyvek.
Thanks for the anticipated input. I may be wrong but its my understanding that there is no difference which way moisture will travel in tyvek. You can put the logo printed side on the inside and it would breath the same as logo printed side on the outside.
Tyvek® House Wrap has a tensile strength of only 30/30 lb/in. So, after installation, but before the exterior cladding and final fasteners, Tyvek® House Wrap may be susceptible to damage due to high winds and moisture exposure.
One of the most significant alternatives to housewrap that addresses weaknesses is integrated vapour-permeable overlays for OSB sheathing boards, such as Arctek® Dryshell™. The proprietary layer is bonded to OSB, creating a product that is moisture resistant and vapour permeable.
The house wrap is technically a water-resistant barrier, which prevents moisture from entering the wall. Even if contractors take all precautions they're supposed to take to protect your home from water damage, something can go wrong.
Tear-resistant
DuPont™ Tyvek® is made to perform in harsh, rugged and extreme conditions. Water, chemicals, heat, cold, rough handling, long-term outdoor use? No problem! Tyvek® is tear, puncture, water, UV and chemical resistant.
First, let's clarify a crucial point: the best practice for housewrap is not to layer it. Multiple layers of housewrap on a project can hinder the building envelope's drying potential, increasing the risk of undesirable moisture-related failures, and hide water damage to sheathing or structure.
DuPont™ Tyvek® HomeWrap® is the original house wrap, incorporating unique material science that helps keep air and water out, while letting water vapor escape.
Should there be a vented cavity/airspace on the outside of the Tyvek® wall membrane? Yes, to allow vapour to escape to the outside atmosphere. The cavity/airspace may be vented naturally through cladding/tile joints, or ventilated with airbricks, vents etc.