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.

The second would be to blow insulation into the walls. What do you suggest that we do. The answer happily is yes. The irc 2000 code and our building dept.

Tyvek is not an insulation. They are each right in a way. 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. 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.

Installing foam board insulation under vinyl siding today. Myself i would not consider using the siding without sheathing but that s your decision. 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. 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.

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. In fact the two products combined make your home super insulated from outside wind and weather. This explains why the house does not retain heat. It depends what you are trying to do and you give little information leaing one to guess.

It seems that we have two options. It is an air barrier. The wrap should go behind the foam insulation. Use tyvek over building felt under siding.

The seams should be taped and the windows and doors should be taped. And either way you should use a barrier like tarpaper or tyvek underneath it. Vinyl siding is one of if not the most popular exterior cladding for residential homes. Then yes it is recommended to have a tyvek type house wrap installed on your home.

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