Flat Roof Rigid Foam Insulation

Once the roof demo was complete and the flat roof was cleared of any remaining debris some rotted 2x material around the perimeter of the roof was replaced.

Flat roof rigid foam insulation.

This type of insulation works best for an exposed ceiling directly below a flat roof. It accounts for over 60 of all installs. However most cathedral ceilings and low slope flat roofs are insulated roof assemblies. You can even place it under the foundation slab.

Insulated roof assemblies can be vented or unvented. Foam control flat roof insulation is compatible with all major roofing materials and assemblies. For a 1 inch board equivalent of 6 r value. Installing it will probably cut your energy bills a bit but will definitely make your living quarters more comfortable.

Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance. Flat roof insulation installation. Install nailbase for cladding. Foam control flat roof insulation is a cost effective durable and energy efficient solution for roof insulation.

With this kind of roof the insulation follows the slope of the roof. They keep your home at a comfortable temperature without the need to crank your heat. The panels need to fit together tightly to help prevent warm air from leaving the top of the building. It is top quality and the most cost effective product for your flat roof.

A roof over a vented unconditioned attic does not need to include any insulation. We recommend having at least 20 r value worth of material for optimal energy efficiency. Install it anywhere from the roof to the foundation. No long term r value loss or thermal drift.

Rigid foam insulation also known as insulating boards provide high r values. After the roof deck is prepared the rigid foam boards need to be cut to size to fit snugly together on your roof. Rigid foam is produced in various size panels 4 ft x 8 ft 4ft x 4ft etc. The most efficient and best insulation used is rigid foam polyiso.

Iso is available in a range of thicknesses that come in increments of 1 inch. While expensive the best insulation is polyiso rigid foam. Most do it yourselfers can actually install rigid foam board insulation on their own. Usually homeowners spend about 25 of the total cost to install a flat roof on high quality insulation.

The rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers.