If you have a flat roof on your home, you will need to use a slightly different method to insulate it. The majority of flat roofs don't come with crawlspaces, attics or venting. This means that any insulation must usually either be on the inside of the home or installed on the outside of the roof underneath the covering material. If you do have a crawl space, it is possible to add insulation in this area. Below are some of the solutions for adding insulation to a flat roof.
Rigid Foam Board
Rigid foam board insulation can be installed on a flat roof before the roof covering is applied or inside the home prior to the installation of paneling or sheet rock. These panels can be purchased in varying thicknesses. Obviously, as the material's thickness increases, so does the R-value. This insulation should be installed on the roof before you apply a rubber membrane.
When you install composite insulation on your roof, it should be made either of an EPS foam with a fiberglass facer or expanded polystyrene. Also make certain that it adheres to UL Class A specifications. This type of insulation works well either for flat roofs or low slope roofs and can be integrated with a number of different roof coverings. When you use composite insulation, you don't necessarily need a cover board when you are you are applying membrane roof coverings. Like rigid foam board, this insulation is manufactured in a range of R-values.
While you're adding insulation to the exterior of your roof, you might decide you would like to create a bit of a slope so as to prevent pooling water. Pooling water is responsible for great deal of damage to flat roofs, often resulting in leaks inside the home. You can prevent this by installing tapered foam insulation underneath the roof membrane to create a tilt that drains the water away. EPS insulation has the advantage of being manufactured from recycled materials and without using harmful chemicals.
An excellent alternative to using rigid foam insulation on your exterior is to apply spray foam insulation to the interior before you install panels or sheet rock on the ceilings or walls. Since this is a spray-on insulation, it creates a continuous, thick barrier against cold or heat. It also keeps out airborne pollutants. Spray foam insulation has to be installed by a professional like Tri-State Contractors, since it requires specialized knowledge and equipment.