Rigid Insulation Over Roof Deck

The roof deck can be plywood metal concrete or wood planks.

Rigid insulation over roof deck.

The insulation installed over the roof deck must be installed in multiple layers with joints offset in order to control convective looping at joints between insulation panels. An excellent fire barrier densdeck roof boards feature a noncombustible core and inorganic surface that offer greater fire protection than other conventional commercial roofing products when applied over combustible roof decks and steel decks. I live in charleston sc in an old 1858 3 story wooden house. Polyisocyanurate extruded polystyrene xps.

Foamular xps roof insulation for commercial buildings page 5 foamular xps roof insulation for commercial buildings foamular xps insulation is a rigid foam insulation which meets the needs of today s design professionals for a truly sustainable insulation product. Rigid insulation under a cool roof in zone 3. It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is. Rigid board insulation is the most common type of insulation used in low slope commercial roofing.

The rigid insulation over roof would have controlled the temperature of the condensing surface the underside of the roof deck so that i would not have had to use the spray foam except at the perimeter to provide the air seal to the tops of the walls. Plan to replace asphalt shingle roof with standing seam metal. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. It is made from cellular plastic or fibrous materials and pressed into boards.

Materials appropriate for insulating sheathing with unvented cladding substrate include. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer. 6 of rigid iso with or without pre applied nailbase above the roof deck feels like the right solution to this humble pilgrim. Appreciate this extremely helpful blog.

The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Rigid foam insulation installation prepare roof deck. How to install insulation board over an existing roof membrane.

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