Do You Need Tyvek Under Siding

During a recent repair to our siding we found that the house had no building wrap tyvek under the siding.

Do you need tyvek under siding.

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. Use tyvek over building felt under siding. Tyvek is designed for new homes only.

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. I want to replace the tar paper but i can t find it at homedepot or lowes. Its possible the damage could have been even worse with tyvek. 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.

If some one decides they should have been informed about what was under the siding i need to know how to respond to that. Its mostly just bad flashing but if the flashing fails the tyvek is supposed to be a back up right. Why do homes need house wrap. That said adding 1 2 to 1 of foam insulation board over sheathing and under siding will do much much.

It seems that we have two options. Vinyl siding is one of if not the most popular exterior cladding for residential homes. I saw a new house with felt paper under the siding rather than tyvek. Tyvek is not designed as a product for older homes.

Builder omits house wrap under siding. Faq s acronym s terminology to tyvek or not to tyvek that is the question. One would be to remove the siding wrap the house and then reside it. 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.

Our house was built about seven years ago. 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.