Insulation Under Metal Roof Deck

With rising heating and cooling.

Insulation under metal roof deck.

Metal roofs are poor insulators. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. 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. 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. In climate zone 4 non marine. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof. 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. 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.

Does it need ventilation space btw the deck and insulation and or a vapor barrier facing oriented to the inside. Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point. Next step stainless steel drip edges and shingles. 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.

Heat and cold penetrate metal. How to attach rigid insulation on the underside of the roof deck. 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. Insulation above the roof deck or air vapor impermeable insulation below the roof deck is needed for condensation control in an unvented roof.

Metal roofs are durable and last much longer than conventional roof deck and shingle constructions but they come with a drawback. But a preinstalled membrane may be even more effective at removing condensation. 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. The greater your home s thermal resistance factor or r value the more energy efficient it is.