Rigid Foam Insulation Vapour Barrier

The list of uses includes crawl space radiant floor attic and walls.

Rigid foam insulation vapour barrier.

If you want to learn more about crawl space insulation check out this article. To complete the vapor barrier you would want to foam seal or tape all the sides where the rigid meets timber because these gaps will facilitate vapor flow. Install it anywhere from the roof to the foundation. Rigid foam insulation is usually a qualified vapor barrier.

You can even place it under the foundation slab. The rigid insulation installed on the interior should ideally be non moisture sensitive and allow the wall to dry inwards hence the recommended use of vapor semi permeable foam sheathing. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. Rigid insulation is one of the best tools to reduce your energy costs.

Note that foam sheathing faced with aluminum foil or polypropylene skins would also be acceptable provided only non moisture sensitive materials are used. To ensure a proper seal you will want to foam seal or tape all the sides where the foam panels meets the wood. Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck. However an installation between the studs can pose a challenge.

This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses. Cover the insulation with a vapor barrier before you install it. Rigid foam insulation also known as insulating boards provide high r values. Yet an installation between any studs may present a problem.

Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. It will degrade its r value. Keep foam board insulation away from direct sunlight prior to installation. Rigid foam board insulation is generally considered a vapour barrier.

In any case the vapor barrier must point to the warm side. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same. Yet an installation between any studs may present a problem. This diagram shows how to install them in your crawl space.

By installing the crawl space vapor barrier over the insulation you will prevent holes in the vapor barrier from securing the rigid foam to. All foam boards absorb water vapor. However an installation between the studs can pose a challenge. Our product is easy to handle and install.