Do I Have To Use Moisture Barrier Under Vinyl Siding

Canadian codes sources.

Do i have to use moisture barrier under vinyl siding.

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. Vinyl siding is one of if not the most popular exterior cladding for residential homes. 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. 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.

We describe the requirements for house wrap or vapor or moisture barriers beneath vinyl siding and cite u s. To further protect the home a waterproof barrier should be installed between the siding and the home. It also serves as an air barrier. And that leads to air infiltration and seepage the kinds of things that drive up energy costs.

Generally referred to as rigid foam insulation this type of foam insulation is. They have the potential to release moisture into the structure creating an inward vapor that doesn t exist with vinyl siding. 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. Where is the wall located.

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. Although vinyl does a great job of keeping water out it does not offer a complete waterproof design. Siding jobs do leak so when the water resistive barrier leaks water can get into the wall and lead to mold and rot. The goal is to create a barrier to water entry that can shed moisture that made it past the siding or roof.

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. Water will remain between the siding and the moisture barrier for a time but it will. Why is there moisture behind my siding. Vapor retarder use and placement.

This article includes photographs of leaks on and perhaps into a vinyl sided house wall. Moisture barrier house wraps do the same thing but for rain snow and other outside moisture. If high winds force rain beneath the vinyl siding it harmlessly runs down the moisture. In most communities building codes require a moisture barrier between the house boxing and the siding.

The page top photograph shows that a lot of water more than you might guess may be running over the surface of.