Do You Need Tyvek Under Siding

The irc 2000 code and our building dept.

Do you need tyvek under siding.

This explains why the house does not retain heat. 2 i don t like having tyvek seams at the corners 3 with the windows under the t1 11 5 4 trim becomes to thick could use 1x trim 4 if i install the windows over the t1 11 my only seal then is the flashing tape under the trim. Faq s acronym s terminology to tyvek or not to tyvek that is the question. 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.

Use tyvek over building felt under siding. Tyvek is not an insulation. During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. Vinyl siding is one of if not the most popular exterior cladding for residential homes.

The wrap should go behind the foam insulation. In fact the two products combined make your home super insulated from outside wind and weather. It depends what you are trying to do and you give little information leaing one to guess. The answer happily is yes.

Then yes it is recommended to have a tyvek type house wrap installed on your home. The seams should be taped and the windows and doors should be taped. One would be to remove the siding wrap the house and then reside it. It is an air barrier.

And either way you should use a barrier like tarpaper or tyvek underneath it. Once this is done the wrap is designed to make the home water tight in case a storm comes before the siding is finished being installed. Installing foam board insulation under vinyl siding today. What do you suggest that we do.

They are each right in a way. The second would be to blow insulation into the walls. If you choose to install house wrap with rigid foam generally it should go under the insulation not around 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.

There is a foam insulation product designed for. If this was true than every architect and every builder all over the country should be talking about it and it should be on the plans that you can t use tyvek under cedar.