Flat Roof Rigid Foam Insulation

No long term r value loss or thermal drift.

Flat roof rigid foam insulation.

Foam control flat roof insulation is a cost effective durable and energy efficient solution for roof insulation. You can even place it under the foundation slab. The rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. It accounts for over 60 of all installs.

However most cathedral ceilings and low slope flat roofs are insulated roof assemblies. Flat roof insulation installation. Rigid foam is produced in various size panels 4 ft x 8 ft 4ft x 4ft etc. Rigid insulation layers exterior to existing roof sheathing must provide sufficient thermal insulation r value to control condensation risk see climate specific guidance.

After the roof deck is prepared the rigid foam boards need to be cut to size to fit snugly together on your roof. The panels need to fit together tightly to help prevent warm air from leaving the top of the building. Foam control flat roof insulation is compatible with all major roofing materials and assemblies. Install it anywhere from the roof to the foundation.

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. Rigid insulation is one of the best tools to reduce your energy costs. Install nailbase for cladding. We recommend having at least 20 r value worth of material for optimal energy efficiency.

For a 1 inch board equivalent of 6 r value. Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers. Rigid foam insulation also known as insulating boards provide high r values. This type of insulation works best for an exposed ceiling directly below a flat roof.

You can expect to pay about 55 100 sq ft. While expensive the best insulation is polyiso rigid foam. Insulated roof assemblies can be vented or unvented. Iso is available in a range of thicknesses that come in increments of 1 inch.

The thinnest board is 1 inch. With this kind of roof the insulation follows the slope of the roof. A roof over a vented unconditioned attic does not need to include any insulation. They keep your home at a comfortable temperature without the need to crank your heat.

Installing it will probably cut your energy bills a bit but will definitely make your living quarters more comfortable. It is top quality and the most cost effective product for your flat roof.