Rigid Insulation On Top Of Roof Deck

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

Rigid insulation on top of roof deck.

Now comes the really really big point. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. Building air tightness would now preside at the top of the building enclosure at the roof deck and attic walls gables. 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 ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. 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 6 inches of rigid insulation added to the top of the existing roof deck needed to be done in a manner that was invisible. Benefits of rigid foam on top of sheathing. Reinforcing thin concrete with steel wire would be important to keep it from breaking up and becoming a hazard in an earthquake.

Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof. When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air can escape. 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.

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. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. 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 foam insulation installation prepare roof deck.