Insulation Under Metal Roof Deck

Heat and cold penetrate metal.

Insulation under metal 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. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the. 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. 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.

With rising heating and cooling. Metal roofs are durable and last much longer than conventional roof deck and shingle constructions but they come with a drawback. The greater your home s thermal resistance factor or r value the more energy efficient it is. Next step stainless steel drip edges and shingles.

But a preinstalled membrane may be even more effective at removing condensation. Metal roofs are poor insulators. 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. Polyurethane spray foam metal roof insulation.

The original rafters are extended but original roof deck sheathing cut back to be flush with the original wall sheathing. 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. Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point. 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. 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. Does it need ventilation space btw the deck and insulation and or a vapor barrier facing oriented to the inside. On the front of the roof edges of the roofs the overhangs were extended to hide the thickness of the roof insulation photograph 10.

Metal roofs are made from steel copper or aluminum panels. The problem with using. Thomas for a concrete slab roof deck that has a torch down roof with no over deck insulation would placing mineral wool insulation under the deck be appropriate. They are used in commercial and residential structures to protect against weather and other exterior elements.