Roofing Foam Board

2 in x 4 ft x 8 ft.

Roofing foam board.

Closed cell foam indicates that all the cells are enclosed not connecting with other cells or combined with air. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. Buy 48 or more 15 18. Finishing the roofing once a nice smooth surface of sheathing was in place on the flat roof.

As the most used insulation type for roofing applications polyiso is a closed cell foam that is created by heating chemicals and synthetic materials into a composite material that cools into rigid foam panels. As my article states you need a minimum of about 1 5 inch of eps 1 inch of xps or 1 inch of polyiso. Owens corning foamular 150 1 in. Rigid roof insulation board.

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. Foam roofing bonds around roof penetrations such as pipes vents and edges forming an impenetrable wedge leaving these penetrations high and dry additionally the roof surface is built up in ponding areas to eliminate heavy standing water and improve drainage. To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam. It s light weight provides ease of handling.

2 in x 4 ft x 8 ft 1 faced polystyrene garage door foam board insulation item 15357 model 2x48x96 r tech. Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall. The rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. Closed cell polyisocyanurate polyiso foam core integrally bonded to inorganic coated glass facers.

If you want to install rigid foam above your roof sheathing in climate zone 3 then 1 2 inch of rigid foam board is not ideal this rigid foam layer needs a minimum r value of r 5 and that s impossible with 1 2 inch of foam. This gypsum cover board is enhanced with a coated glass mat facer that achieves fm vsh approval rating with adhered 60 or 80 mil smooth back jm tpo membrane and standard jm tpo membrande adhesives when 4 x4 panels are adhered in low rise foam adhesive using the ribbon application with 12 o c.