Roof Decking With Insulation

Hot roofs are insulated above the rafters.

Roof decking with insulation.

Vented attics have insulation installed underneath the roof deck in direct contact with the decking. The dew point is typically within the insulation layer lowering condensation risks. Walls foundations roof and roof decks air distribution ceilings interior solutions mechanical pipe equipment appliances commercial insulation home page. Install baffles or make sure there s 1 minimum of airspace between the roof deck and insulation.

Because the insulation is so close to the roof and you want to avoid unwanted moisture buildup these roofs will need to be completely sealed off. Rigid foam board is just above the roof deck or an exterior insulation option. Ceiling insulation is then installed on the attic floor. Explore owens corning commercial roof and roof deck insulation products to help with your next building project.

For most of us in the low slope roofing industry it s considered to be absolutely standard to have insulation placed above the roof deck. It typically has 3 variations. For such constructions the principles and benefits of unvented attic construction are similar to that occurring in a single family residence. Insulation for condensation control.

But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. Air sealing hot roofs is critical. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.