Flat Roof Foam Board

Attach to deck board.

Flat roof foam board.

Insulated roof assemblies can be vented or unvented. Foam control plus and foam control flat roof insulation are recognized for use in direct to deck applications. And then install 1 2 minimum recommended is 5 8 or thicker plywood on top of battens. Ul evaluation report er11812 01 and ul roof deck construction no.

After the roof deck is prepared the rigid foam boards need to be cut to size to fit snugly together on your roof. Flat roof insulation installation the rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. For a basement remodeling project consider insulating basement walls with foam board. How to improve insulation levels of flat roofs.

There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam. 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. Run vertical 2 3 boards battens over roof sheething 16 o c. With this kind of roof the insulation follows the slope of the roof.

Iso is available in a range of thicknesses that come in increments of 1 inch. Use a premade kit for this type of project. Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. Retroplus roof board is an expanded perlite mineral aggregate board.

The panels need to fit together tightly to help prevent warm air from leaving the top of the building. Foam board insulation ideas. Attach the tongue and groove insulation boards to the concrete wall with adhesive. However most cathedral ceilings and low slope flat roofs are insulated roof assemblies.

This will create ventilation and separation between attic roof substate and the roof itself. Rigid roof insulation board. It accounts for over 60 of all installs. Cost of rigid foam board insulation.

458 recognize foam control plus 150 up to 6 7 and foam control 100 up to 10 being installed directly over steel roof decks along with a class a b or. The most efficient and best insulation used is rigid foam polyiso. Rigid foam is produced in various size panels 4 ft x 8 ft 4ft x 4ft etc. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to retroplus roof board on one side and a glass reinforced facer on the other.

For new construction use rigid boards to insulate slabs and the outside of foundation walls.