Foam Roof Vents

Insulate above and below the roof not all homes have deepenough rafters to insulate to desired r values easily.

Foam roof vents.

Heat from the house rises up to the attic but when there isn t one the heat rises up to the roof. Foam insulation can play an important role in both vented and un vented roof assemblies. Rigid foam and spray foam are two of them. In a vented roof foam can seal the openings and serve as an air barrier and a vapor retarder in addition to its insulating function.

Similarly not everyone can afford to spray nearly 10 in. In an un vented roof foam can serve as the air barrier and vapor retarder and prevent moisture from getting in to the roof. This alternative to traditional building insulation fiberglass can be applied into wall cavities holes concrete slabs and even onto roof tiles and. Attic ceiling to stop airborne moisture from reaching a cold surface and condensing inside the building envelope in this design insulation effectively separates the interior and exterior spaces while slowing down moisture flow so the dewpoint is not achieved within.

All insulation materials require proper venting. Of open or closed cell spray foam in their roof or to stack a half foot of rigid foam on the roof deck. Cathedral roofs especially need a lot more insulation between the ceiling and the rafters because there usually isn t any attic space.