Ridge Vent Closed Cell Insulation

Spray foam insulation that s convenient and easy to use.

Ridge vent closed cell insulation.

Rigid insulation is one of the best tools to reduce your energy costs. The best attic insulation. R value of 7 in 1 inch 97 closed cell foam. It didn t include the gable end walls and the contractor proposed enlarging the gable end vents and adding a ridge vent.

100 free of cfcs vocs penta bdes urea formaldehyde. Dewpoints for various temperature and humidity levels. Closed cell spray foam insulation with solstice. As such it would seem venting the attic would increase.

Hey a well vented attic is a good thing right. Cathedral roofs especially need a lot more insulation between the ceiling and the rafters because there usually isn t any attic space. A ventilation chute between the foam and the wood deck that is connected from the soffits to the ridge vents is an option for some designs to ensure moisture if properly vented. You can even place it under the foundation slab.

Heat from the house rises up to the attic but when there isn t one the heat rises up to the roof. In the summer warm moist air mostly comes from outside the building. Use closed cell foam it green for attic rafters. Install it anywhere from the roof to the foundation.

All insulation materials require proper venting. Get your kits the easy to use spray foam kit. Unless you re bulk filling rafter bays between 2 10 or 2 8 rafters with closed cell spray foam this approach will likely require you to fur out the rafters to accommodate additional insulation to achieve desired r values. The proposal to insulate the underside of the roof with several inches of open cell foam had a serious flaw.

Both open cell and closed cell spray foam insulation adhears extremely well to the underside of roof decks and the rafters surrounding them when installed. Both low density open cell and medium density closed cell spray foam can be used in an unvented attic to provide the needed thermal resistance and airtightness. The vent space should be at least 2 inches high and the width of the framing bay at each soffit vent lstiburek 2006. The evaluation service report esr for spray foam insulation products provides a valuable resource based on a third party review of testing information useful for utilizing these.

Rigid foam insulation also known as insulating boards provide high r values. Class i e 84 fire retardant meets building code spec. For best performance the airspace in the vent chute should be a minimum of 2 in.