Vapour Barrier Under Slab Insulation

Viper ii under slab vapor barriers viper vaporcheck ii viper ii is the first line of defense against damaging water vapor and soil gas threats existing below the concrete slab.

Vapour barrier under slab insulation.

My two main thoughts are potential mold growing under the vapor barrier and potential slab degradation. Avoidance of the installation of vapor barriers such as polyethylene vapor barriers foil faced batt insulation and reflective radiant barrier foil. 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. Of the materials as specified in ashrae 160 p under this evaluation approach.

Vapor barrier insulation 7 brand. In any case the vapor barrier must point to the warm side. The slab is in fine condition. Because extruded polystyrene insulating board will absorb little moisture the vapor barrier can be placed above or below the slab insulation.

I would like to put down an impermeable class 1 vapor barrier on top of the slab before i put down any flooring. 4 2020 2 40 p m. Is a vapor barrier necessary under a concrete slab with foam insulation and if so where does go. But consider going with a barrier that has water vapor permeance less than 0 3 perms.

Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. What risks are there to do so. Viper ii products are multi layer co extruded virgin polyolefin under slab vapor barriers retarders. Vapor barriers under concrete floor slabs.

Cure with waterproof sheets rather than with water or curing compounds. Retarder below the slab in direct contact with the slab or rigid insulation having a thermal resistance of at. Choosing a vapor barrier. If you want to make sure your slab on ground gets dry and stays dry use a vapor barrier.

All vapor barriers should conform to astm e 1745. The slab has plastic sheeting underneath it already. By steve ragan director research and technical services the answer to this controversial question from both angles is a qualified yes vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. For a vapor barrier below a concrete floor slab most choose 6 to 10 mil polyethylene.