Roof Deck Insulation Board

It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is.
Roof deck insulation board. Armstrong world industries inc. 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. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks. Three in one composite roof deck panels provide acoustics insulation and a nailable surface that accepts a wide variety of roofing materials.
Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. How to install insulation board over an existing roof membrane. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof.
Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. Explore owens corning commercial roof and roof deck insulation products to help with your next building project. Rigid foam board is just above the roof deck or an exterior insulation option. Retroplus roof board is an expanded perlite mineral aggregate board.
The previous four options are all used beneath the roof. Tectum e tectum e n acoustical roof deck description. It typically has 3 variations.