Insulate Roof With No Attic Space

With 2x6 rafters this will give about an r 19 roof higher if you use thicker solid foam insulation.

Insulate roof with no attic space.

So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest. Fill the remaining space with fiberglass or cellulose. Works well costs more. Box out light fixtures.

The general answer to the question of whether insulating a garage attic will lower energy costs is no at least not appreciably. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space. This gives the best air path eaves to ridge but costs more for the labor to nail furring and cut insulation into pieces to fit between rafters.

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. Insulating the attic floor. Because most flat roofs don t have an attic crawl. In practical terms you can choose between mineral wool or insulation boards.

For such constructions the principles and benefits of unvented attic construction are similar to that occurring in a single family residence. Effects of insulating the garage attic. An attic you want vented but in your case you want the ceiling roof space sealed. By laurie brenner homes with flat roofs require a different approach to insulation than the standard approach used for homes with pitched roofs.

If you put cellulose up there it will help insulate but you need a vapor barrier above the ceiling because you ll have warm ceiling air hiiting colder roof surface and condensing which will turn the cellulose into a moldy mess. Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck as is the case with cathedral ceilings. Since your home s heating and cooling system usually does not extend into the garage insulating this area does little to change the cost of running the system. Water is insulation s enemy.