Insulated Floor Slab Construction

3 clean the surface of the slab thoroughly then apply a coating of asphalt primer to help the asphalt cement bond.

Insulated floor slab construction.

Both codes state slab edge insulation is not required in jurisdictions designated by the building official as having a very heavy termite infestation. The insulation phase is crucial for a radiant floor. 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. 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.

The compacted aggregate base is first followed by a 6 mil polyethylene vapor barrier then insulation then rebar or wire mesh or both. Insulation requirements for slab on grade floors can be found in section r402 2 9 of the 2012 iecc and section n1102 2 9 of the 2012 irc. Follow label directions and allow it to dry thoroughly. 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.

When a slab is being insulated in new construction the vapor barrier is usually laid down first before the slab is poured. Up to 80 of heat loss in a floor slab occurs around the edges. There are many different soil conditions and corresponding slab designs. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.

Where insulation is positioned above the slab. 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. 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.

Related slab on grade foundation pages. Slab on grade foundation detail design. 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.