How To Insulate A Concrete Roof Slab

Concrete is cold and hard but an insulated concrete slab can make a heated garage significantly warmer and more energy efficient.

How to insulate a concrete roof slab.

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. Up to 80 of heat loss in a floor slab occurs around the edges. Building another sloped tiled roof over current flat concrete roof supported by metal. Martin holladay explains insulating a slab on grade in the energy smart details department.

The best way to insulate a slab is to isolate it from the ground. The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects. This layer of roof tiles is fragile inherently and roof cannot be used for walking etc. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.

To insulate a flat roof with a concrete deck we recommend a warm deck construction method where the vapour control layer is sandwiched between the concrete deck and a layer of rigid pir insulation boards. Insulating a slab on grade depends on at least four factors. The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab. 3 clean the surface of the slab thoroughly then apply a coating of asphalt primer to help the asphalt cement bond.

Adding a layer of roof tiles placed directly on floor of roof which allow air to circulate under and over but keep convectional heating of the roof slab to a minimum. The basis for this simple but effective solution is natural air pressure. Follow label directions and allow it to dry thoroughly.