How do i insulate my PEX in my attic?
#1
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How do i insulate my PEX in my attic?
I have run about 40 feet of PEX through my unconditioned attic for my bathroom remodel. Seems like it would be a pain and expensive to put foam tubes on each individual pipe, 10 of them to be exact. Would it work if I laid fiberglass batts over the pipes since they all run right next to each other? Would that qualify as insulated?
skeeter
skeeter
#2
Not the best situation.
The PEX would need to be laid directly on the sheetrock and the insulation above it.
You need some warmth from the floor below to keep it from freezing.
The PEX would need to be laid directly on the sheetrock and the insulation above it.
You need some warmth from the floor below to keep it from freezing.
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They run on top of and perpendicular to the ceiling joist. So you think it would be best to use the foam tubing and then also cover with insulation?
skeeter
skeeter
#4
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You actually want to insulate above the pipes more than the pipes themselves. You want the heat from inside the house to keep the pipes warm, and insulate above the pipes.
The best way to insulate in your case is to run batt insulation above the joists and above the piping. Leave the space between the drywall and the pipes free.
Just to clarify, CA, meaning California, not Canada, right? I wouldn't run piping in an attic in cold areas.
The best way to insulate in your case is to run batt insulation above the joists and above the piping. Leave the space between the drywall and the pipes free.
Just to clarify, CA, meaning California, not Canada, right? I wouldn't run piping in an attic in cold areas.
#6
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For your piping in the attic use only continuous runs of PEX with NO fittings. PEX tubing can withstand freezing very well but fittings can not.
Last edited by Pilot Dane; 02-24-21 at 09:09 AM.
#8
I suggest that you dig out the insulation in the joists and directly under the entire length of the PEX pipes and all the way down to the ceiling below. Leaving a strip of empty space about 6 inches wide under and following the route(s) of the pipes. . For loose fill insulation, staple cardboard strips to the joists to keep the insulation from falling into the empty spaces. Then put the batt on top of the joists, pipe, and all
Optionally put just a half round of pipe insulation on the top side of the pipe.
Optionally put just a half round of pipe insulation on the top side of the pipe.