Spray Foam Insulation Between Roof Rafters

Cathedral roofs especially need a lot more insulation between the ceiling and the rafters because there usually isn t any attic space.

Spray foam insulation between roof rafters. Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials. Closed cell and open cell. Class i e 84 fire retardant meets building code spec. Spray foam insulation that s convenient and easy to use.

100 free of cfcs vocs penta bdes urea formaldehyde. Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing. We install thermofoam our high performance spray foam insulation between the rafters of your roof to provide an airtight thermal seal of your home. Your new warm roof system prevents heat that you generate during the winter from escaping from your home creating a single ambient environment.

It can be fairly messy so benefits from having experienced crew do the installation. All insulation materials require proper venting. Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through. You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters.

Two material options called open and closed cell where closed cell is more dense greater r value and much more expensive. The best attic insulation. R value of 7 in 1 inch 97 closed cell foam. A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel.

Heat from the house rises up to the attic but when there isn t one the heat rises up to the roof. Similar to loose fill though this is a liquid that when applied becomes a durable layer of foam insulation. 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. Rigid foam and spray foam are two of them.

Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while. 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. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. Get your kits the easy to use spray foam kit.

It rots roofs people have told me.