How To Insulate A Concrete Roof 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.

How to insulate a concrete roof slab.

Building another sloped tiled roof over current flat concrete roof supported by metal. 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 climate the type of foundation whether the slab includes hydronic tubing for radiant heat and the severity of the local termite problem. This layer of roof tiles is fragile inherently and roof cannot be used for walking etc.

The best way to insulate a slab is to isolate it from the ground. Martin holladay explains insulating a slab on grade in the energy smart details department. The basis for this simple but effective solution is natural air pressure. 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.

Insulating a slab on grade depends on at least four factors. Concrete is cold and hard but an insulated concrete slab can make a heated garage significantly warmer and more energy efficient. The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects. 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. Follow label directions and allow it to dry thoroughly. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.