INSULATION AND AIR / VAPOUR BARRIER FOR SLAB ON GRADE:
[ Ссылка ] Step by Step Guide:
Install anchor bolts and lateral insulating panels and then the center panels. Next, cut around the plumbing system and mechanical equipment.
Ensure that there are no gaps in the insulation, even in problem areas.
Install a polyethylene air / vapour barrier over the entire insulation area. In some cases, a coat of closed-cell spray foam will be added at this point in order to add insulation and to create a continuous moisture soil gas barrier.
Seal the polyethylene barrier at all penetration points and openings with appropriate building tape.
1) We use the term 'air / vapour barrier' to avoid confusion of their individual roles. Polyethylene needs to be intact with no holes simply for the containment and evacuation of radon gas buildup below the slab. If you live in an area with no known radon contamination or have no intention of installing a radon evacuation system, holes in the poly are not a concern, as a 'vapour barrier' does not need to be sealed or airtight. See our vapour barrier pages for more information.
2) Insulation levels within American & Canadian building codes vary by region, but what is consistent is that they are insufficient for the prevention of heat loss through basement floors, and cost homeowners a lot of money. Regional building codes will demand in the range of R5 to R7.5, but doubling that will pay for itself in as little as 2 years. We recommend a minimum of R15 in most cold climates, more if you are including radiant heat within your slab on grade foundation. Watch another video about slab on grade foundation detail see: [ Ссылка ]
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