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#1
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Insulating ductwork
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace?
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#2
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Insulating ductwork
On Apr 24, 8:25*am, wrote:
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? if its ever moist fiberglass batt will attract moisture and no longer insulate, moisture ruins it. spray foam is a better option or glued on foam board |
#3
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Insulating ductwork
On Apr 24, 8:27*am, bob haller wrote:
On Apr 24, 8:25*am, wrote: Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? if its ever moist fiberglass batt will attract moisture and no longer insulate, moisture ruins it. spray foam is a better option or glued on foam board They have insulation specifically made and sized for ducts. It has an aluminized looking outer cover. I've seen it used in basements and attics. Not sure about crawlspaces, but I would think it would be OK. |
#4
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Insulating ductwork
On Wednesday, April 24, 2013 5:27:44 AM UTC-7, bob haller wrote:
On Apr 24, 8:25*am, wrote: Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? if its ever moist fiberglass batt will attract moisture and no longer insulate, moisture ruins it. spray foam is a better option or glued on foam board Highly flammable spray foam or foam board sounds like a good, safe idea under the house, uncovered. Foil-backed rigid fiberglass board would be safer. |
#5
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Insulating ductwork
On Wednesday, April 24, 2013 7:25:33 AM UTC-5, wrote:
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? By the way, this is round duct. |
#6
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Insulating ductwork
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#7
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Insulating ductwork
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#8
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Insulating ductwork
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? *I used duct wrap insulation when I did my metal ducts. It was perfect for the job with an overlapping foil edge. It comes in different thicknesses. It is fiberglass with a foil back. I sprayed a little aerosol glue on the duct to hold one end while I wrapped it around. The seams were taped with foil tape. I also caulked the duct joints to minimize losses. I bought the duct wrap at a local plumbing supply. Some examples: http://www.amazon.com/gp/search/ref=... g=mrelect-20 |
#9
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Insulating ductwork
On Wednesday, April 24, 2013 3:14:33 PM UTC-5, John G wrote:
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? *I used duct wrap insulation when I did my metal ducts. It was perfect for the job with an overlapping foil edge. It comes in different thicknesses. It is fiberglass with a foil back. I sprayed a little aerosol glue on the duct to hold one end while I wrapped it around. The seams were taped with foil tape. I also caulked the duct joints to minimize losses. I bought the duct wrap at a local plumbing supply. Some examples: http://www.amazon.com/gp/search/ref=... g=mrelect-20 Is there anything I can put over it to protect it from a cat clawing on it. |
#10
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Insulating ductwork
On Wed, 24 Apr 2013 05:27:44 -0700 (PDT), bob haller
wrote: On Apr 24, 8:25*am, wrote: Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? if its ever moist fiberglass batt will attract moisture and no longer insulate, moisture ruins it. spray foam is a better option or glued on foam board Or glued on duct-board |
#11
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Insulating ductwork
On Wed, 24 Apr 2013 12:36:14 -0400, Jim Elbrecht
wrote: On Wed, 24 Apr 2013 05:25:33 -0700 (PDT), wrote: Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? How long has the duct been there? Might be a better plan to just replace it with insulated duct. I used the flexible round duct. It was dirt cheap- and *way* easier than cleaning the old ductwork, then figuring out how to wrap it in insulation. The down side is that in the 10 yrs since I installed it, I've had one duct that a mouse decided to chew through and nest in. Now *that* made a disgusting mess when the heat came on that fall. Jim You won't catch me EVER using flex duct. Anywhere. For ANY reason. |
#12
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Insulating ductwork
Can I use fiberglass bat to insulate the main and branch ductwork in my
crawlspace? *I used duct wrap insulation when I did my metal ducts. It was perfect for the job with an overlapping foil edge. It comes in different thicknesses. It is fiberglass with a foil back. I sprayed a little aerosol glue on the duct to hold one end while I wrapped it around. The seams were taped with foil tape. I also caulked the duct joints to minimize losses. I bought the duct wrap at a local plumbing supply. Some examples: http://www.amazon.com/gp/search/ref=... g=mrelect-20 Is there anything I can put over it to protect it from a cat clawing on it. *Off hand nothing that I can think of except more sheet metal. The foil backing on the duct wrap is a little more durable than that of wall insulation. |
#13
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Insulating ductwork
On Apr 25, 6:56*am, "John Grabowski" wrote:
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? *I used duct wrap insulation when I did my metal ducts. *It was perfect for the job with an overlapping foil edge. *It comes in different thicknesses. It is fiberglass with a foil back. *I sprayed a little aerosol glue on the duct to hold one end while I wrapped it around. *The seams were taped with foil tape. *I also caulked the duct joints to minimize losses. *I bought the duct wrap at a local plumbing supply. *Some examples: http://www.amazon.com/gp/search/ref=...e=UTF8&camp=17... Is there anything I can put over it to protect it from a cat clawing on it. *Off hand nothing that I can think of except more sheet metal. *The foil backing on the duct wrap is a little more durable than that of wall insulation.- Hide quoted text - - Show quoted text - I take it the crawl space also serves as a shelter for his cats? Otherwise, it would seem the best solution would be to make the crawl space animal proof. I don't think duct insulation would be particularly attractive to cats to claw on. Especially outside cats that have plenty of better things. |
#14
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Insulating ductwork
On Wednesday, April 24, 2013 7:25:33 AM UTC-5, wrote:
Can I use fiberglass bat to insulate the main and branch ductwork in my crawlspace? It is a shelter for the cats. There is actually acess to it in my garage. The cats do claw at it and sometimes rest on top of it. |
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