Roof Decking With Insulation

Explore owens corning commercial roof and roof deck insulation products to help with your next building project.

Roof decking with 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. Ceiling insulation is then installed on the attic floor. The dew point is typically within the insulation layer lowering condensation risks. Air sealing hot roofs is critical.

It typically has 3 variations. Hot roofs are insulated above the rafters. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof.

Vented attics have insulation installed underneath the roof deck in direct contact with the decking. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. For such constructions the principles and benefits of unvented attic construction are similar to that occurring in a single family residence. Walls foundations roof and roof decks air distribution ceilings interior solutions mechanical pipe equipment appliances commercial insulation home page.

The later is used in new construction as the interior board serves as an inner wall. Install baffles or make sure there s 1 minimum of airspace between the roof deck and insulation. 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. For standard steel deck construction this approach has many advantages such as.