Home Improvement

Is Tyvek combustible?

A: Tyvek® should not be considered as flame retardant and its flammability is like most synthetic fibers.

Is Tyvek wrap flammable?

Some types of Tyvek® are labeled “Class A,” meaning that they are safe to use in public and private buildings, while other types are labeled the lesser “Class 1” for “normal flammability.” Tyvek® will melt and shrink away from a flame, and it will burn at approximately 750° F; chemical-resistant.

Can you heat Tyvek?

You don't want to squash these bubbles you just want to let them react to the heat. And again remember that you've got to allow time for the heat to penetrate. The pressing sheet the board.

Is Tyvek a thermal barrier?

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.

Is Tyvek considered plastic?

Though Tyvek superficially resembles paper (for example, it can be written and printed on), it is plastic, and it cannot be recycled with paper.

Is Tyvek fire resistant?

Tyvek® can endure temperatures ranging from -70°C to +118°C. However, some deformation may occur, at around 80°C. Also, note that Tyvek® is made from high density polyethylene, which can burn; thus Tyvek® should not be considered fire resistant.

Can you use Tyvek on a roof?

All Tyvek® products in Canada and the U.S. have been tested and approved as products to be installed behind exterior walls. However DuPont Tyvek® Protec provides a high-quality roof underlayment choice.

Does it matter which side of Tyvek faces out?

Tyvek HomeWrap, Tyvek StuccoWrap, Tyvek DrainWrap, and Tyvek CommercialWrap are equally effective in both directions. However, DuPont Tyvek StuccoWrap and Tyvek DrainWrap has a specially engineered surface that should be placed with the grooves in a vertical direction.

Can you use Tyvek as a tarp?

Tyvek makes fine tarps. It is functionally waterproof AND it breathes enough that even with a tight, winter setup it will rarely form condensation.

What can you use instead of Tyvek?

Alternatives to Tyvek

  • R-Wrap.
  • Tar Paper.
  • StrongSeal.
  • Zip System.
  • Foil Insulation.
  • Insulated Concrete Form.

At what temperature does Tyvek melt?


The melting point of Tyvek® is 135°C and the ignition point of high density polyethylene is approximately 400°C.

Can Tyvek be machine washed?

No bleach – or machine wash, gentle cycle, cold water. Drip dry only. Do not put in a dryer, dry clean, or use an iron on this fabric.

Can house wrap be used as a vapor barrier?

For example, House wrap by itself is not an air barrier, it is a vapor barrier. However, IF installed properly, which is rare, with taped seams, bottom, top edges, and no tears, it acts as an air barrier. So primarily it acts as a vapor barrier, but installed properly can do both; vapor barrier and air barrier.

How long can you leave house wrap exposed?

How long can DuPont Tyvek be exposed before siding? Tyvek HomeWrap, Tyvek DrainWrap and Tyvek StuccoWrap should be covered within 120 days (4 months). Tyvek CommercialWrap should be covered within 270 days (9 months).

Can you put 2 layers of house wrap on?

There is no problem with doing this. Housewrap is “breathable” by design so you won’t trap moisture anywhere. You could build a wall with ten layers of housewrap and it would be more durable, not less.

Can you staple Tyvek?

Tyvek says you can use 4 staples per 9 feet of house wrap if you tape over them an apply the siding right away. But a cap stapler is better. Apply house wrap up the gables before installing exterior trim, even if the attic is not conditioned.

How many years does Tyvek last?

Here is what Tyvek looks like after 30 years sitting behind wood siding. I was surprised to see that the Tyvek deteriorated so badly behind the siding after 30 years. It probably failed 10 years before at the 20 year mark. You can see the wood behind it is rotted.

Do you tape Tyvek seams?

Seam. We go once that's on the wall we want to take all the seams of the Tyvek there's vertical seams and horizontal seams so we want to make sure we tape every one of those Koreans for drain wrap two

Can you put foam insulation over Tyvek?

DuPont™ Tyvek® wraps can be installed UNDER or OVER exterior foam insulation.

How much should Tyvek overlap?

6” to 12” inches

DuPont™ Tyvek® Metallized Tape is required for taping DuPont™ Tyvek® ThermaWrap™. UNWRAP roll at corner, leaving 6” to 12” inches vertical overlap. Step 2 Roll should be plumb. Bottom edge of roll should extend over sill plate interface at least 2”.

Which side of Tyvek goes out?

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.

Does Housewrap go on before insulation?

The answer, happily, is yes. In fact, the two products combined make your home super-insulated from outside wind and weather. If you choose to install house wrap with rigid foam, generally, it should go under the insulation, not around it.

Does flashing go over or under house wrap?

The house wrap has to be flashed properly to keep the water moving down and out, not down and in. That means you want the upper layers to come down over the top of the lower layers. Where builders often get this wrong is at the top of a window.

Do you install windows before house wrap?

The most important part of weatherproofing begins before the window goes in. After the house wrap is cut, tuck the bottom flap into the house and install sill flashing.

How do you fasten house wrap?

Install Capped Fasteners With the “Stinger”

Yes, you can hand-nail capped fasteners when installing house wrap, but it’ll take you forever. We recommend a Stinger Cap Staple Hammer instead. It works like a hammer tacker, only it sinks capped nails instead of staples.

Is typar the same as Tyvek?

Typar® Building Wraps has a lower perm rating compared to Tyvek® HomeWrap®; so, a wall covered with Typar® can take longer to dry, which increases the risk of mold, mildew, and rot. Tyvek® HomeWrap® has a drainage plane so can manage bulk water better than Typar® Building Wrap, that does not have a drainage plane.

What is better than Tyvek?

While both Tyvek® HomeWrap® and the ZIP System provide air- and moisture-resistance, each has potential problems that may diminish their intended purpose. A better solution to a WRB is Barricade® Building Wrap. Barricade Building Wrap is strong, durable, permeable, and easy to install.

Whats better than Tyvek?

Zip System. The Zip System is a series of panels that can be used on the roofs or walls of an unfinished house as a weather barrier. It is sturdier than Tyvek because it is wood based, making it an ideal structural addition to walls. Its Zip System tape seals up gaps between the panels.