Water Vapor Barrier Paint

Vapour barrier paint or vapor barrier paint in the u s.

Water vapor barrier paint.

The higher the number the more readily water vapor can diffuse through the material. It combines a primer and finish in a single fast drying coat and is specially formulated for manufactured housing facilities. Technically many of these materials are only vapor retarders as they have varying degrees of permeability. Water vapor barrier paint is often applied to drywall walls and ceilings in attics where warm air tends to rise.

A vapor barrier is any material used for damp proofing typically a plastic or foil sheet that resists diffusion of moisture through the wall floor ceiling or roof assemblies of buildings to prevent interstitial condensation and of packaging. The paint formula usually indicates the percent of pigment. If the perm rating of the paint is not indicated on the label find the paint formula. Basically any material rated at less than 1 perm is considered a vapor barrier retarder.

The reason as you may have read is that when there is a vapour barrier in homes in hot humid climates that rely on air conditioning for human comfort that vapour barrier is effectively on the wrong side in the cooling season. Fluid applied air water resistive barrier and water vapor barrier vb is a fluid applied air and water resistive barrier that stops air and water leakage in cavity wall masonry veneer construction as well as in stucco eifs and most other building wall assemblies. The company zinsser makes a shellac based white primer called bin that is primarially used for hiding difficult stains but it too rates in at less than 1 perm and this company depending who is working in their labeling department this month occasionally identifies it as a vapour barrier paint. It is common to use plastic sheeting as a basement vapor barrier but waterproof paint will work just as well.

In the case of water vapor you will want to consider installing a vapor barrier. Basement vapor barrier paint is a modern development for water barrier techniques. Available at distributors nationwide. Hydrohalt s water based polymer modified formula waterproofs and prevents vapor transmission for a variety of subterranean surfaces including concrete masonry brick block wood and metal.

In the basement water vapor can travel up from the ground and affect the walls and floor in the lower half of your home. Materials have a moisture vapor transmission rate that is established by standard test methods. Vapor barrier paints can be an effective option for existing homes in colder climates. Moisture vapor barrier primer finish interior latex is a coating designed to reduce the loss of moisture through walls and ceilings.

One common set of units is g m day or g.