Hot answers tagged insulation
4
I think you'll have to get one of these vapor barrier boxes, and fit it before installing your electrical box.
Seal up where the cable penetrates, then install your electrical box.
The other options would be to cut a larger hole and patch drywall, or seal it up from the back side (but that would require access to the other side of the wall/ceiling).
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NRG greenboard is 98% air and therefore only 2% polystyrene
NOTHING can be mounted TO this. Your reel may be mounted THROUGH it to the studs behind.
From the Greenboard handbook:
17.1.5 Solid Blocking of Fitting and Accessories
Consideration should be given to the installation of
wall mounted accessories i.e. taps, electrical ...
2
I had an old farm house once with a similar situation. This publication from the University of Alaska-Fairbanks proved very helpful, and it applies to cathedral ceilings as well.
In summary a roof needs to be either well insulated, with no air gaps against the underside of it (fiberglass insulation right up next to the decking), or it needs good airflow. In ...
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I would not waste the insulation on an outside wall unless your garage door was getting insulation. Drywalling has benefits though... First you need to use fire resistant (5/8) in most places in the US for garages, a fully drywalled and painted garage will be deemed nicer by those wanting to give you money for your house, white flat walls reflect light the ...
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The most common method would be to blow in high density cellulose between the rafters. This method requires that a small hole (1 to 2 inches each) be drilled in sheetrock, at the top and bottom of each bay. After the insulation is blown in, repair the holes or use plugs to cover the holes. Foam can also be used, but is about 4X the cost of cellulose and very ...
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Yes you can sheet rock with longer screws. However the screws will basically have no hold until they hit the wood. Your previous insulation will continue to shrivel. Your ceiling will sag (glue and screw your drywall to ceilings). And you will be like - "why didn't I prep this for a couple hours so I don't have to redo it." Nothing worse than completing ...
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When you say ventilation windows, do you mean operable glazed windows or small permanently open screened openings? Either way, fuel burning appliances require adequate free openings in enclosures to ensure proper exhausting of combustion by-products. Electric water heaters do not require such openings.
Your local building authority probably has specific ...
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There's nothing wrong with fiberglass insulation beneath the floors. It will be, most likely, the most cost-efficient solution.
If you have a situation where critters like the insulation, well you have a vented crawl space! Critters get in there.
If you have an issue where the insulation gets moist and sags, the problem is not the insulation, it's a ...
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I think I would be inclined to use XPS foam cut and inserted between the joists. Caulk around all of the seams. This is similar to how you insulate rim joists in a basement. It would also act as a vapor and air barrier.
Another option would be closed cell spray foam but this is usually expensive and not a DIY job.
If you were willing to do it from the top ...
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You need to have plastic sheeting - thicker the better stapled to your joists on the bottom with the insulation sandwiched in between. This is a must to first keep wind out and second to protect your insulation.
Additional info - I don't think I would press any insulation accept spray foam up to the subfloor. Using the Building Science findings and ...
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I used spray foam in my attic. Here's why:
I wanted the A/C units in the attic to be in the thermal envelope of the house.
Placing anything but sprayed open cell or closed cell foam on the underside of the roof deck was the only option for me. I could have used SIP panels if I was replacing the roof.
To get R-value for my area (central FL) I would need ...
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