Insulated Floor Slab Construction

When a slab is being insulated in new construction the vapor barrier is usually laid down first before the slab is poured.

Insulated floor slab construction.

Related slab on grade foundation pages. Follow label directions and allow it to dry thoroughly. Mainly heated slabs radiate outward rather than downward so insulation on the edges of the slab is most important. Depending on the use of the building the slab can then be finished ready for use or receive a screed suitable for a floor finish.

If the insulation is going below the slab the damp proof membrane dpm is laid next followed by the insulation a polythene separating layer and the concrete slab. But when adding insulation to an existing slab the vapor barrier is laid over the top of the slab before the foam insulating panels are installed. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. Perimeter slab insulation heat loss through an insulated slab windows 33 roof ceiling 8 slab 15 6 doors 5 walls 39 insulation and fenestration criteria table 402 1 1 insulation and fenestration requirements by componenta climate zone fenestration u factorb skylightb u factor glazed fenestrationb e shgc ceiling r value wood frame wall r value.

4 where rainfall can be heavy use a fine tooth trowel to apply cold cut back asphalt mastic over the entire slab use about one gallon per 100 square feet of floor. Although building codes differ by region builders typically use r5 and r10 insulation under the concrete slab but floors insulated with r20 contain the heat in your basement far better than those insulated with lower r values. This page is about how to build a thickened edge concrete slab on grade fpsf footing on soil with a high water table to prevent frost heave by first installing drainage below the slab. The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab.

The compacted aggregate base is first followed by a 6 mil polyethylene vapor barrier then insulation then rebar or wire mesh or both. Where insulation is positioned above the slab. 3 clean the surface of the slab thoroughly then apply a coating of asphalt primer to help the asphalt cement bond. Up to 80 of heat loss in a floor slab occurs around the edges.

Both codes state slab edge insulation is not required in jurisdictions designated by the building official as having a very heavy termite infestation. There are many different soil conditions and corresponding slab designs. Slab on grade foundation detail design.