Is Tyvek Necessary Under Vinyl Siding Replacement

I just pulled some vinyl siding installed 1990 with tyvek under it.

Is tyvek necessary under vinyl siding replacement.

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. Tyvek is not an insulation. Then yes it is recommended to have a tyvek type house wrap installed on your home. It s coming in your house.

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. 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. It is an air barrier. The sidewall had icicles protruding from beneath one section of the vinyl siding where rain had penetrated the siding and was frozen in its tracks trying to escape.

The seams should be taped and the windows and doors should be taped. Learn more about housewrap and re siding your home. Vinyl siding is one of if not the most popular exterior cladding for residential homes. In this q a a reader is wondering if he should replace the housewrap before re siding his home.

Dmoore oct 22 14 at 3 51. Tyvek is that it tears really easy when installing obviously shouldn t tear with siding over it. Say that house wrap in not required under vinyl siding however alot of people are using it under vinyl siding and there is a debate seeming to begin to. Now that being said i did point out it must be done right or it is useless to use tyvek.

There is nothing wrong with tar paper as a housewrap if it is in good condition. If the tar paper is in good condition then i wouldn t replace it. Water does and will get behind your vinyl siding. I d rather not use the flashing because it will make it obvious the siding isn t really stucco.

Tyvek is like skin for your house. The wrap should go behind the foam insulation. Vinyl siding is not water proof nor do any of the manufacturers claim it to be. We answer this question and offer some additional advice to ensure he has the most successful re siding.

But vinyl siding is not waterproof as i learned while inspecting a house in frigid temperatures after a heavy wind driven rain. There is a foam insulation product designed for. Short answer is yes it is absolutely necessary if installing vinyl siding.