Insulated Floor Slab Construction

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.

Insulated floor slab construction.

The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor 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. 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. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.

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. 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. Follow label directions and allow it to dry thoroughly. Related slab on grade foundation pages.

However even a newer slab insulated with r 20 may not be adequate depending on a few factors including the type of. There are many different soil conditions and corresponding slab designs. 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. When a slab is being insulated in new construction the vapor barrier is usually laid down first before the slab is poured.

Both codes state slab edge insulation is not required in jurisdictions designated by the building official as having a very heavy termite infestation. The compacted aggregate base is first followed by a 6 mil polyethylene vapor barrier then insulation then rebar or wire mesh or both. Up to 80 of heat loss in a floor slab occurs around the edges. Where insulation is positioned above the slab.

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. 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.