Insulating Cathedral Ceiling With Foam Board

As for iso board vs.

Insulating cathedral ceiling with foam board.

There are different types of spray foam. To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam. How to attach rigid insulation to ceilings. The cathedral ceiling space in question between the top of the kneewall and the flat 2nd floor bedroom ceiling is only about 4 feet.

Spray foam the iso board would be a lot cheaper especially if this is a diy project. What are some of the most reviewed foam board insulation. A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. First closed cell foam has a 60 percent higher r value per inch than open cell 6 3 vs.

The slope of the ceiling is about 45 degrees. R5 radiant acoustic insulation kit stc 19 5 piece with 172 reviews and the amvic multipurpose high density insulation kit r10 2 3 8 in. My feeling is that the dew point profile would end up in the xps foam board hence a vb should be put on first deck. To simplify things and save a lot of time cutting and fitting you could just nail the iso board to the bottom of the rafters.

5 panels with 97 reviews. It provides an open airy look and feel to the room and they are often in demand among home buyers. Will the foam board be effective if it is cut tight to the rafter width and layed on top of the drywall. Open cell which is like what couch cushions are made of and closed cell which is rock hard.

Regular ceilings are likely to be under. Closed cell foam ceiling insulation in a vaulted ceiling offers substantial advantages over open cell. In the attic you can install rigid foam board to the rafters and essentially create a cathedral ceiling in there. I looked at the unvented schematics and i am not sure that fits the bill for up here canada west coast.

Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall. The higher r value reduces condensation when moist interior air hits the now less cold ceiling vice versa in summer with humid outside air. Cathedral ceilings are a feature in many homes that add to value to the house because the high ceiling tends to make rooms look larger. But for the end product of a foam filled air sealed attractive cathedral ceiling with an insulation value of r46 creating a comfortable home with steady indoor temperatures and low energy bills year round there was no question in chris mind he wanted to do it.

In order of assembly. About the only time you are likely to add rigid insulation to a ceiling is in a retrofit of a cathedral ceiling. Thanks for your suggestions.