Cathedral ceilings over great rooms or other high sloped ceilings can be difficult to insulate as there isn’t the advantage of an attic to buffer between occupied space and the outside. Unlike many insulations, Icynene® can be sprayed directly to the underside of a cathedral ceiling, no matter what the shape or angle of the ceiling. Because it provides an air seal as well as regular R-value* thermal insulation, there will be less air leakage and your energy bills will stay lower.
A vented cathedral ceiling allows for continuous ventilation between the roof and the insulation material. An unvented cathedral ceiling does not have this vent, but when using Icynene spray foam insulation this does not affect its performance because Icynene acts as an air barrier.
- Stack effect occurs when heated air escapes through the ceiling and roof from upper levels of the home and is replaced in lower levels of the home by drawn-in, outdoor air. This occurs with conventional insulation types, such as fiberglass and cellulose, because they don’t meet air barrier standards (based on air permeability testing, ASTM E 283). Therefore they don’t sufficiently stop air flow/leaks like Icynene spray foam insulation does, and they can settle over time.
- In heavy snowfall areas, ice damming is a common problem due to warm, moist interior air coming into contact with the cold roof surface, where the moisture then condenses and freezes.
Results of Using Icynene Spray Foam for Cathedral Ceiling Insulation
- Improves energy performance for savings of up to 50%^ of heating and cooling costs.
- Minimizes potential for water/moisture damage and associated health concerns (mold) that can result from ice dams.
* R means resistance to heat flow. The higher the R-value, the greater the insulating power. Compare insulation R-values before you buy. There are other factors to consider. The amount of insulation you need depends mainly on the climate you live in. Also, your fuel savings from insulation will depend upon the climate, the type and size of your house, the amount of insulation already in your house, and your fuel use patterns and family size. If you buy too much insulation, it will cost you more than what you'll save on fuel. To get the marked R-value, it is essential that this insulation be installed properly.
^ Savings vary. Find out why in the seller's fact sheet on R-values. Higher R-values mean greater insulating power.