Rigid Insulation On Top Of Roof Deck

Now comes the really really big point.

Rigid insulation on top of roof deck.

Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. 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.

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. Rigid foam insulation installation prepare roof deck. 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. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and.

The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. Benefits of rigid foam on top of sheathing. 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. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the.

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. 6 of rigid iso with or without pre applied nailbase above the roof deck feels like the right solution to this humble pilgrim. The roof deck can be plywood metal concrete or wood planks. This requires the use of soffit vents and a roof ridge vent to.

The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. Many homes in more urban areas or other places with dense populations are opting for this method because they can better optimize space. Building air tightness would now preside at the top of the building enclosure at the roof deck and attic walls gables.