Is Tyvek Necessary Under Vinyl Siding

In order for insulation to really do its job it needs to be in direct contact with what it is insulating.

Is tyvek necessary under vinyl siding.

The irc 2000 code and our building dept. Hi im a new inspector and could use some advice. It seems that we have two options. Tyvek under 1 4in foam for vinyl siding.

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. That said adding 1 2 to 1 of foam insulation board over sheathing and under siding will do much much. Use tyvek over building felt under siding. Tyvek is designed for new homes only.

I had wrote up a lot of issues with this house because it. Tyvek is like skin for your house. I want to replace the tar paper but i can t find it at homedepot or lowes. She asked me if she should still buy the house if a moister barrior was not present.

Yes dupont tyvek wb can be used under any façade including brick stucco vinyl cedar siding metal and stone. It s coming in your house. Vinyl siding is not water proof nor do any of the manufacturers claim it to be. That being said the foam should be put on first and left untaped.

During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. This explains why the house does not retain heat. Installing foam board insulation under vinyl siding today. Perhaps recent damage to their siding showed no house wrap under their vinyl or they are working with a contractor who doesn t believe house wrap to be necessary.

Proper installation under each façade is essential to ensure tyvek provides the maximum level of air infiltration resistance and bulk water holdout. We re in the middle of having vinyl siding installed on our 1950s house. House wrap is indeed considered a necessity by the majority of contractors as well as housing authorities including local building and planning departments. Customer just called on a 2001 town home i inspected two weeks ago.

She had heard from a neiborhood forum that some of the houses in that neighbor hood did not have any moister barrier behind the siding. One would be to remove the siding wrap the house and then reside it. Builder omits house wrap under siding. Our house was built about seven years ago.

Short answer is yes it is absolutely necessary if installing vinyl siding. 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. Tyvek is not designed as a product for older homes.