Garage Insulation

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02-16-04, 06:51 AM

tinman

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Garage Insulation

I had built a 30' X 56' pole garage. My question is how to insulate it. My inside is unfinished at the moment so far I have no insulation at all. I have in floor hot water heat installed also. I thought about using rolled kraft faced insulation on my roof trusses which are 24" OC and then using a silver 1/2" foam board for my ceiling which is 10' high. I do have osb board with house wrap and viynal siding and shingle roof. my side walls have 8' OC 4"X6" post with 2X4" horizontal on 24" OC. I just need to know what would be the best way to insulate? Any help would be great.

Thanks
James

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02-16-04, 09:34 AM

slider

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I have a Morton bldg about the same size and construction. I used kraft faced rolls for the roof. For the walls I just cut 1 1/2" white foam board to fit between the 2x6 horizontals. Still gets darn chilly in there pretty quickly when the heater shuts off so I'm thinking I might have to break down and do the walls right this summer and finish them out by adding 2x6 between the poles and kraft insulation there too. My ceiling is open since I work with long/tall things fairly often.

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02-16-04, 09:56 AM

Ed Imeduc

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Tinman. Id put a 4 mil poly V/B there on the ceiling truss then 5/8" drywall for the ceiling. Blow about 12"cellulose in there BEFORE you tape it off if its cold out. Then tape it.Be sure and vent this attic good

On the walls just go with a R13 in the 2"X4" paper side to the room.

ED

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02-16-04, 10:03 AM

tinman

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Thanks

Thanks Ed,
I was just wondering if I could use that silver shiny foam 1/2" sheets for the intierior ceiling for its reflectiveness, to help and reflect light down to make my garage brighter?

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02-16-04, 10:18 AM

Ed Imeduc

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Dont think it would help that much here. And dont think it would hold up there on the ceiling. thats why code here calls for 5/8 on the ceiling with the truss at 24" on center.

For light there have you looked at the so called SUN tubes. Go up on the roof and down to the celing work just fine with sun light
Almost like a light bulb
ED

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Insulation, Radiant and Vapor Barriers
First-hand experiences with sprayed-foam insulation?

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SteveBausch on Feb 15, 2004

Am beginning to think that it's a great way of insulating floors over garages, crawlspaces, etc. Wouldn't consider it for attics, blown-in cellulose seems to be extremely cost-effective as attic insulation. Walls are a toss-up, to me at least. Though it does seem that spraying the stud cavities is superior (but expensive) when the cavity is open. If I wasn't going to open the wall, then blown-in cellulose would be my choice. There are plenty of options, my focus is working with older construction that has little or no insulation.
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jimdogtoday on Feb 15, 2004

i live in arizona. i have a pitched roof, flat ceiling. the attic is currently insulated between the ceiling joists. i am wondering if i can further reduce heat by attaching styrofoam/reflective insulator to the above roof joists, leaving air space at low and high end of joist. would this hurt the roof? would it help reduce the heat in the attic? the reason for wanting to do this is arizona's extreme heat and airconditioning venting (also insulated) being in the attic. will also be installing an attic fan to blow the heat out as soon as the sun goes down. (for all those who wonder why arizona does not go on daylight savings time--we want/need the sun to go down)