Oct 21, 2014  The house wrap is slippery material and using the wrong tape on the seams can lead to failure. Only the factory approved brand should be used whether it be Tyvek or Typar.IMPORTANT. They sliced the wrap above the window and installed the top piece over the window’s nailing flange. This directs water properly. This is a little detail that is often missed. The house wrap is slippery material and using the wrong tape on the seams can lead to failure. Only the factory approved brand should be used whether it be Tyvek or Typar.IMPORTANT. They sliced the wrap above the window and installed the top piece over the window’s nailing flange. Fasteners: use a cap nailer because slap staples leak (Tyvek says can use 4 staples per 9 feet of house wrap if you tape over them an apply the siding right away). But use a cap stapler instead. Because it is better. Apply house wrap up the gables before installing exterior trim, even if the attic is not conditioned. Here is my take on putting Tyvek on with foam, it's a complete waste of time and material to put Tyvek on either before or after foam. The whole point of house wrap is to allow the structure to breath, the foam completely defeats this ability. The foam acts as a vapor barrier, enough said. House wrap, e.g. DuPont Tyvek, goes on the wood sheets, and is covered up by a waterproof siding / shingles. Tyvek is like GoreTex a-la Mountain jackets but for houses. It is waterproof but allows smaller water vapor droplets through. If Tyvek is a good idea or not depends on where you are.

1. Tyvek House Wrap Problems
2. Tyvek Wrap Before Or After Windows 7
3. Tyvek Wrap Before Or After Windows Xp
4. Tyvek Tape Around Windows
5. Tyvek Wrap Before Or After Windows 7

Tyvek House Wrap Problems

The Basics of Water-Resistive Barriers

House wrap is a fabric, paper, or board material that covers the exterior sheathing of house walls to protect the wall framing. Most siding materials are not totally effective at repelling water, particularly wind-driven rain. When water gets behind the siding, house wrap is there to shed the water and keep it from entering the wall cavity. House wrap also permits the transfer of water vapor to the outside of the protected structure because water vapor can pass through it. There are several types of house wrap, and each has its own installation requirements.

Why Do You Need House Wrap?

House wrap technically is a type of water-resistive barrier or WRB. The purpose of using house wrap is to prevent the entry of moisture into the wall cavity from outside. While house wrap is water-resistant, it typically is not water impermeable or waterproof, with good reason. Just as rain and moist air can enter a wall cavity from outside the house, moisture-laden air can also enter a wall from inside the house. If a house wrap is impermeable, it can trap this indoor moisture in the wall cavity, potentially leading to rot and mold growth.

Most WRBs have a permeability rating between 5 and 60; a minimum of 5 is required by most building codes.

For locations where data are kept, check the computer setups.

Contrary to many claims, house wrap usually does not serve as an air barrier to prevent cold air from entering wall cavities. Only a few special types of WRBs are designed to perform this function, and they must be installed meticulously to create a reliable air barrier.

House wrap is intended to be installed over the sheathing and behind the siding, no matter what siding you are using: wood, fiber cement, vinyl, brick, stucco, and others. Siding manufacturers may recommend specific types of WRB to use with their products.

House Wrap Types

The original WRB was asphalt-impregnated felt paper or 'tar paper,' the same material commonly used as an underlayment under roof shingles. More recently, the term 'house wrap' is usually used to describe plastic fabric WRBs such as Tyvek.

• Asphalt felt (tar paper)—The standard requirement is Type 1 felt meeting ASTM D 226 standards.
• Grade D building paper—Made of asphalt-impregnated kraft paper, this house wrap is commonly used under stucco siding.
• Polyolefin fabric—'Plastic' house wraps typically are made of woven polyethylene or polypropylene fibers.
• Liquid WRB—These tar-like liquids are applied with a paint roller or spray equipment and can serve as an air barrier.
• Rigid foam—Some types of rigid foam insulation board can serve as a WRB if they are properly sealed.

• WRB sheathing—Sheathing panels made of oriented strandboard (OSB) with special coatings can serve as both sheathing and WRB; installation includes sealing all panel joints with the manufacturer's tape.

House Wrap Installation Tips

Tyvek Wrap Before Or After Windows 7

Always follow the manufacturer's installation instructions, and use only approved fasteners and sealers, as applicable. General recommendations that usually apply to fabric-type house wrap include:

• Seal all seams with a special tape provided by the house wrap manufacturer.
• Work from the bottom up, overlapping the lower courses.
• Install house wrap before doors and windows.
• Wrap the fabric around the edges of windows and doors to the inside of the frame.
• Install the house wrap between the double top wall plates.
• Prevent chemicals from coming in contact with the fabric, as they can adversely affect the house wrap’s water-resistance.
• Extend the house wrap over the footing top at least 2 inches.
• Install a drainage provision at the bottom of the external siding material, if recommended.

Tyvek Wrap Before Or After Windows Xp

Tyvek Tape Around Windows

Tyvek Wrap Before Or After Windows 7

• Use staples or nails specifically designed to hold down house wrap material. Nails should be at least 1 inch long and spaced 12 to 18 inches on-center.
• Overlap horizontal joints of wrap by at least 6 inches.
• Overlap vertical joints by at least 6 inches and no more than 12 inches, depending on the severity of the area's weather conditions.
• Lap house wrap over the entire top of any step-flashed areas.
• Install a protective rain screen to control moisture movement when porous siding is being installed.