Do I Have To Use Moisture Barrier Under Vinyl Siding

In most communities building codes require a moisture barrier between the house boxing and the siding.

Do i have to use moisture barrier under vinyl siding.

For homes with vinyl siding many homeowners are under the false assumption that vinyl is waterproof. The goal is to create a barrier to water entry that can shed moisture that made it past the siding or roof. The page top photograph shows that a lot of water more than you might guess may be running over the surface of. Moisture barrier house wraps do the same thing but for rain snow and other outside moisture.

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. To further protect the home a waterproof barrier should be installed between the siding and the home. Although your siding is your home s first defense against wind many types have small gaps and cracks at the joints where siding panels line up. And by the time it is discovered the damage can be extensive.

Installing foam insulation under vinyl siding is a wise choice for homeowners who are seeking to protect their homes against moisture infiltration as well as improve energy efficiency. Canadian codes sources. They have the potential to release moisture into the structure creating an inward vapor that doesn t exist with vinyl siding. Vinyl siding is one of if not the most popular exterior cladding for residential homes.

If you have an older home that may not have moisture barrier protection under the concrete slab you can still add a barrier to protect your vinyl floor from bubbling. And that leads to air infiltration and seepage the kinds of things that drive up energy costs. Often the leak can go on for many years inside the wall before anyone notices. Vapor retarder use and placement.

This article includes photographs of leaks on and perhaps into a vinyl sided house wall. It also serves as an air barrier. If you are adding an exterior wall anywhere in the house and you answered yes to either of the above questions you should consider using a vapor retarder. If high winds force rain beneath the vinyl siding it harmlessly runs down the moisture.

Generally referred to as rigid foam insulation this type of foam insulation is. There are many products available in home centers and hardware stores in liquid form that can be used to cover and protect the concrete slab from the top. We describe the requirements for house wrap or vapor or moisture barriers beneath vinyl siding and cite u s. Why is there moisture behind my siding.

Water will remain between the siding and the moisture barrier for a time but it will.