Insulation Under Metal Roof Deck

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.

Insulation under metal roof deck.

Metal roofs are made from steel copper or aluminum panels. Metal roofs are poor insulators. Heat and cold penetrate metal. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions.

In climate zone 4 non marine. 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. Metal roofs are durable and last much longer than conventional roof deck and shingle constructions but they come with a drawback. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof.

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 roofing is one of the most durable and long lasting roof materials on the market and can easily last for decades with little maintenance. 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. How to attach rigid insulation on the underside of the roof deck.

But a preinstalled membrane may be even more effective at removing condensation. Next step stainless steel drip edges and shingles. 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. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof.

Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the. The problem with using. Polyurethane spray foam metal roof insulation. With rising heating and cooling.

The original rafters are extended but original roof deck sheathing cut back to be flush with the original wall sheathing. 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. Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point.