Insulation, Radiant and Vapor Barriers - How to insulate where slope meets collar tie
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rkoudelka
10-13-05, 02:48 PM
I am insulating a cathedral ceiling. I have already started so I hope my method was ok and the inspector doesnt give me a problem. But here is the situation...
It is a sloped ceiling and the slope is about a 45 degree angle and 12'6" long. There is a flat at the top where the collar ties are. This flat is 4'6" The hieght of the flat is about 17 feet.
My R-30 batts are 48" (that all I could find at Lowes or HD) so as you can see I needed just more than 3 to go up the slope (plus the insulation went into a vented soffit by a few inches to ensure good coverage), and just more than 1 to cover the flat.
Since I didnt thnk I could butt them up well where the flat and slope met, I decided to use a full piece to span the corner, with a seem on the flat. It was a little awkward fitting them - turning the 45 degree angle since the colar ties are nex to the rafters and are offset by 1.5 inches, but it worked out pretty well. In fact, it looks like a pretty neat job. But is this an accepted method of insulating in this situation?
I got good coverage still, I think (except where there is to be a ceiling fan up top center of the flat - I just couldnt reach above it but that is 3 peices of 1x6 so its 4.5 inches of solid wood I would think Id be ok without insulation above that one piece.
Any thoughts?
It is a sloped ceiling and the slope is about a 45 degree angle and 12'6" long. There is a flat at the top where the collar ties are. This flat is 4'6" The hieght of the flat is about 17 feet.
My R-30 batts are 48" (that all I could find at Lowes or HD) so as you can see I needed just more than 3 to go up the slope (plus the insulation went into a vented soffit by a few inches to ensure good coverage), and just more than 1 to cover the flat.
Since I didnt thnk I could butt them up well where the flat and slope met, I decided to use a full piece to span the corner, with a seem on the flat. It was a little awkward fitting them - turning the 45 degree angle since the colar ties are nex to the rafters and are offset by 1.5 inches, but it worked out pretty well. In fact, it looks like a pretty neat job. But is this an accepted method of insulating in this situation?
I got good coverage still, I think (except where there is to be a ceiling fan up top center of the flat - I just couldnt reach above it but that is 3 peices of 1x6 so its 4.5 inches of solid wood I would think Id be ok without insulation above that one piece.
Any thoughts?