Whether or not to tape the top and bottom of house wrap depends on your building's moisture management strategy, but generally, you should tape the top, while the bottom should be left open to act as a drainage plane.
All of the seams for the product should be taped according to manufacturer's instructions. Most house wrap manufacturer installation instructions have minimum horizontal overlaps of 4-6 inches and minimum vertical overlaps of 6 -12 inches. Most also require or recommend 1 in.
Yes, you should tape the top of Tyvek house wrap, particularly along horizontal seams and where the wrap overlaps, to ensure a continuous air and water barrier. The tape prevents air infiltration and stops the wrap from flapping before siding is installed, using dedicated Tyvek tape.
Installing house wrap creates a crucial weather-resistant barrier between your sheathing and siding, protecting the house from bulk water and air leaks. The primary goal is to "shingle" the walls, meaning upper layers always overlap lower layers to shed water downward.
Flashing tape goes both over and under the house wrap, depending on which part of the window or penetration you are working on. The golden rule of building is "shingling," meaning upper layers must always overlap lower layers to force water out.
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).
Plastic cap nails or plastic cap staples are highly recommended for fastening the building wrap. Simply put, the use of caps seals holes made by the penetration of the fasteners.
Will duct tape work as well as Tyvek® Tape? No. Duct tape is not designed to be used with Tyvek® products. Tyvek® Tape has been specifically designed to work with Tyvek® products, and should be used in all situations when sealing of the Tyvek® seams is necessary.
Your window tape on the top of the window is over top of the tyvek. It should be under the tyvek on top then the tyvek lapped back over top of it. Your sides are installed correctly with you tape over top of the tyvek. I find it useful to assume every functioning exterior system should function like shingles.
Install the house wrap tightly: Loosely installed house wrap is a liability in terms of proper installation and long-term performance.
Unfaced insulation is great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces. It's best used for interior wall applications that do not face the outside and also in rooms that don't need moisture control, like living rooms, dining rooms and studies.
caulk the bottom edge of the wall sheathing to the mudsill to prevent infiltration at that point. We once installed a 2-ft. strip of housewrap be- tween the sill-seal foam and the mudsill, ac- cording to the instructions of one manufacturer. the housewrap tight against the sheathing.
Even though using traditional seam tape is best practice with mechanically attached housewrap, it's not the highest-performing option. Traditional seam tape may wrinkle or lack sealing pressure, which can cause it to impede water drainage and create “fishmouths” that can trap moisture.
While Tyvek is a popular house wrap for preventing bulk water and air infiltration, it has notable disadvantages. Its effectiveness depends heavily on proper installation.
Tape all corners. The top layer of Tyvek® WRB should go over the bottom layer a minimum of 6”. NOTE: Make the inside corner as tight as possible using a 1x4 or similar.
T50 staples are the world's best-selling heavy duty staple platform. Made to deliver exceptional holding power, these staples are used for all heavy duty stapling applications from installing insulation, house wraps and roofing underlayments to upholstering fine furniture and window treatments.
Whether you tape horizontal seams on Tyvek depends on your building goals. If you only want a drainage plane to shed water, you do not need to tape them, provided the upper layer overlaps the lower layer by at least 6 inches. However, if you are building an airtight home, you must tape all seams.
For installing house wrap, always use plastic cap staples or staples shot through plastic washers. Standard uncapped staples can tear the material and leave holes that allow moisture in. Most manufacturers recommend capped fasteners for superior holding power and to ensure your wall remains weather-resistant.
No, DuPont™ Tyvek® is not a vapor barrier. It is made with unique material science to keep air and bulk water out while allowing moisture vapor inside walls to escape.
Taping Tyvek seams is not strictly required by code if the house wrap is properly overlapped. However, taping all vertical and horizontal seams is the manufacturer's best practice and is essential to maximizing your home's air-tightness and preventing moisture intrusion.
For us general rule is to not cut the tyvek, if it's bottom edge we will often pull it loose and tuck the sill and flashing and tape it down, but never cut. It's a rare situation that I don't put the flashing under the Tyvek.
As a general rule, house wrap should be installed before the windows. This ensures a "shingled" effect, allowing water running down the wall to flow over the window flashing rather than getting trapped behind the wrap.