Insulation Under Metal Roof Deck

Metal roofs are poor insulators.

Insulation under metal roof deck.

Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the. Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point. 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. Metal roofs are made from steel copper or aluminum panels.

On the front of the roof edges of the roofs the overhangs were extended to hide the thickness of the roof insulation photograph 10. They are used in commercial and residential structures to protect against weather and other exterior elements. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof. In order to add moisture barrier under metal roof you can spray the undersides of the roof by using a thick layer of polyurethane spray foam.

The greater your home s thermal resistance factor or r value the more energy efficient it is. 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. In climate zone 4 non marine. Next step stainless steel drip edges and shingles.

The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. Heat and cold penetrate metal. Polyurethane spray foam metal roof insulation. It will help you to eliminate problems that may come when the house becomes extremely cold in the winter and terribly hot in the summer.

Does it need ventilation space btw the deck and insulation and or a vapor barrier facing oriented to the inside. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof. The original rafters are extended but original roof deck sheathing cut back to be flush with the original wall sheathing. The movement of air into indirect conditioning of an unvented attic is a slow gradual process that will not be noticeable by occupants and typically will not put any strain on the hvac system.

But a preinstalled membrane may be even more effective at removing condensation. How to attach rigid insulation on the underside of the roof deck. Metal roofing is one of the most durable and long lasting roof materials on the market and can easily last for decades with little maintenance. With rising heating and cooling.