How To Insulate A Concrete Roof Slab

Martin holladay explains insulating a slab on grade in the energy smart details department.

How to insulate a concrete roof slab.

Building another sloped tiled roof over current flat concrete roof supported by metal. The basis for this simple but effective solution is natural air pressure. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects.

The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab. 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. 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.

The climate the type of foundation whether the slab includes hydronic tubing for radiant heat and the severity of the local termite problem. Follow label directions and allow it to dry thoroughly. Ventilated roof solution paroc air is a simple and safe solution for making dry flat roofs. Insulating a slab on grade depends on at least four factors.

Paroc air keeps the roof structure dry without any mechanical systems. 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 best way to insulate a slab is to isolate it from the ground.