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Old 10-16-2013, 12:03 AM   #1
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insulation in carport


I have a carport with an enclosed room above it. Currently the carport ceiling consists of 2 x 10 fibreglass batts covered by 1/4 plywood. No vapor barrier. Is there a better way to insulate the room above?

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Old 10-16-2013, 12:30 AM   #2
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Post a photo, I would like to see it.

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Old 10-16-2013, 07:36 AM   #3
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insulation in carport


Sprayed foam would certainly be an improvement. It'd give you both insulation and a vapor barrier at the same time. Not as inexpensive as batts, of course, but the increased insulation would be likely to do a lot to reduce energy loss.
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Old 10-16-2013, 06:34 PM   #4
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insulation in carport


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I have a carport with an enclosed room above it. Currently the carport ceiling consists of 2 x 10 fibreglass batts covered by 1/4 plywood. No vapor barrier. Is there a better way to insulate the room above?
Yes but how much do you want to spend.

Rigid foam (Seams taped and sealed) would help by thermally uncoupling the framing and providing some of the vapor retarder layer. Depending on where you are in Canada, the vapor control layer would, in theory, need to be on the warm side but breaking the thermal bridge of the framing and having the cavity airtight will go a long way.

I would pull down the 1/4 ply, make sure the bays are air sealed and full of a HD batt, cover the framing with 2" XPS, and re-cover with plywood. That would make for an efficient floor with roughly R-45 in it.

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Post a photo, I would like to see it.
+1

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Sprayed foam would certainly be an improvement. It'd give you both insulation and a vapor barrier at the same time. Not as inexpensive as batts, of course, but the increased insulation would be likely to do a lot to reduce energy loss.
OC Spray foam is not considered a vapor barrier at any applied depth.

CC SPF is a Class II with enough thickness.
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Old 10-17-2013, 02:04 PM   #5
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insulation in carport


Post #4 and #6, follow the links to the source; air space yes or no?

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Old 10-17-2013, 11:54 PM   #6
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Post #4 and #6, follow the links to the source; air space yes or no?

Gary
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Old 10-18-2013, 12:09 AM   #7
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thanks
What am I...chopped liver...?
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Old 10-18-2013, 08:43 AM   #8
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thanks everybody

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