Flat Roof Foam Board

Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks.

Flat roof foam board.

This will create ventilation and separation between attic roof substate and the roof itself. Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. Use a premade kit for this type of project. 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.

Foam control plus and foam control flat roof insulation are recognized for use in direct to deck applications. How to improve insulation levels of flat roofs. Ul evaluation report er11812 01 and ul roof deck construction no. Usually homeowners spend about 25 of the total cost to install a flat roof on high quality insulation.

It accounts for over 60 of all installs. Attach the tongue and groove insulation boards to the concrete wall with adhesive. 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. For new construction use rigid boards to insulate slabs and the outside of foundation walls.

Cost of rigid foam board insulation. Rigid roof insulation board. The most efficient and best insulation used is rigid foam polyiso. Retroplus roof board is an expanded perlite mineral aggregate board.

Run vertical 2 3 boards battens over roof sheething 16 o c. 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. Insulated roof assemblies can be vented or unvented.

Iso is available in a range of thicknesses that come in increments of 1 inch. This material costs less than other rigid foam boards but still offers an r value of 3 6 to 4 2 per inch. However most cathedral ceilings and low slope flat roofs are insulated roof assemblies. And then install 1 2 minimum recommended is 5 8 or thicker plywood on top of battens.

The panels need to fit together tightly to help prevent warm air from leaving the top of the building. After the roof deck is prepared the rigid foam boards need to be cut to size to fit snugly together on your roof. 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. Foam board insulation ideas.

With this kind of roof the insulation follows the slope of the roof.