Do You Need Tyvek Under Siding

There is no logical reason not to have house wrap under vinyl siding and many authorities strongly agree that it should be viewed as mandatory even if your local building codes don t necessarily require it. That said adding 1 2 to 1 of foam insulation board over sheathing and under siding will do much much. My personal recommendation assuming you are in a locale with winters where the practice is to put a full vapor barrier under the interior drywall is to use a closed cell foam board rated for use under siding if additional insulation is needed covered with drainwrap or better yet foamboard then vertical treated or cedar standoff strip.

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Its mostly just bad flashing but if the flashing fails the tyvek is supposed to be a back up right.

Do you need tyvek under siding.

This explains why the house does not retain heat. One would be to remove the siding wrap the house and then reside it. However if you re interested a residing project offers the perfect time to examine your home s weather barrier and exterior insulation and improve it if need be. I want to replace the tar paper but i can t find it at homedepot or lowes.

I saw a new house with felt paper under the siding rather than tyvek. If some one decides they should have been informed about what was under the siding i need to know how to respond to that. Why do homes need house wrap. It seems that we have two options.

Tyvek is not designed as a product for older homes. In fact many builders disagree on the effectiveness of house wraps altogether and while some builders will only install 15 pound asphalt saturated felt paper underneath exterior siding others swear by plastic fabric house wraps such as typar or tyvek. Our house was built about seven years ago. Tyvek is designed for new homes only.

Vinyl siding is one of if not the most popular exterior cladding for residential homes. Use tyvek over building felt under siding. In the end the decision to install house wrap under your siding is a personal one that you should make after discussing it with your contractor. Builder omits house wrap under siding.

Faq s acronym s terminology to tyvek or not to tyvek that is the question. The contractors had installed foam board on most of the house before i asked why they hadn t installed the tyvek we asked for and have in the contract. We re in the middle of having vinyl siding installed on our 1950s house. I have read mixed things on tyvek that its needed its not its only for new houses it should go over foam under foam over or under based on climate it doesn t.

During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. Its possible the damage could have been even worse with tyvek.

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