Rigid Insulation On Top Of Roof Deck

Rigid foam insulation installation prepare roof deck.

Rigid insulation on top of roof deck.

The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the.

Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Many homes in more urban areas or other places with dense populations are opting for this method because they can better optimize space. The 6 inches of rigid insulation added to the top of the existing roof deck needed to be done in a manner that was invisible.

The rustic bare wood ceiling look is preserved all of the structural wood stays inside the thermal pressure boundary of the building all cozy dry. Now comes the really really big point. 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. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof.

Building air tightness would now preside at the top of the building enclosure at the roof deck and attic walls gables. Reinforcing thin concrete with steel wire would be important to keep it from breaking up and becoming a hazard in an earthquake. They often simplify insulation and air sealing details versus conventional insulation on the floor of the attic that may be compromised by numerous penetrations from recessed lighting fans equipment and ductwork. This requires the use of soffit vents and a roof ridge vent to.

The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. In that climate the thermal mass of an inch or two of concrete on top of the roof deck plus an inch of polyiso on top of that does quite a bit for thermal performance if the structure can take the load. The roof deck can be plywood metal concrete or wood planks. 6 of rigid iso with or without pre applied nailbase above the roof deck feels like the right solution to this humble pilgrim.