Insulation is any material used to slow the transmission of heat or reduce the transmission of sound. Typical materials include fiberglass, foam, blown cellulose, and reflective foil. This should not be confused with weather stripping.

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What should I do about wet insulation in my attic and walls?

We had a lot of snow this winter. In spring when it melted we got water back up from under the eaves trough in our cottage. We now have water damage in our attic along the north and south walls in the ...
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471 views

Should I add a vapor barrier when re-siding?

I am removing the siding on my house in Montana, which was built in 1964. From inside out I have sheetrock, 4" studs with R-11 paper backed fiberglass insulation and gypsum board sheathing. I want ...
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842 views

How can I soundproof my bedroom walls as cost effectively as possible?

My bedroom is next to the kitchen on one wall, a hallway on one wall, the outdoors on one wall and the PC room on the other. The wall that bothers us the most is the kitchen wall. We would like to ...
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3answers
2k views

How do I insulate the ceiling in my crawlspace?

I'm desperately looking for some advice on how to properly insulate the crawl space. I live in eastern Massachusetts where it has recently been in the teens and 20s for low temps in winter. I have a ...
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352 views

What can I do about this gap between the sill/exterior board and the subfloor?

I just discovered that my sill plate and joist setup is different than others I've seen (and I was a Realtor, so I've seen a lot of sills). As you can see from the picture, there's a gap between ...
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399 views

Can I use a magnetic air seal on an exterior door?

It occurred to me it may be a good idea to air seal an outdoor door using a similar magnetic seal as refrigerator doors. I can't find this product available today. Maybe because it would make opening ...
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1k views

How should I insulate a room built into a metal barn?

I'm building a room into our (existing) barn; how should I best go about insulating it? The barn is a Morton building -- pole barn construction, metal siding. It's closed on three sides but open on ...
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233 views

How can I move loose-fill insulation temporarily?

My current bathroom fan is dead and needs replacement. I tried removing it from the inside of the house, but something is holding it. I'll need to do it from the attic. The attic is covered with ...
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582 views

Should central heating pipes through internal brickwork have insulation?

My house has old (large diameter) steel central heating pipes. These travel through the basement before passing up through the house. My concern is that when they pass through internal walls they are ...
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217 views

How can I run plumbing from house to a nearby new office 1.5m away?

I am building a new office next to the house; it is about 1.5m away. I need to run, from the house's upstairs bathroom, 1 hot, 1 cold, and radiator with return (all of which I believe are 28mm to ...
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633 views

How can I add insulation to this roof?

We have an A-frame house in Alaska. The ceiling is 2x8 rafters 16" on center with drywall on inside and 5/8" plywood on outside. We installed R-44 insulation in space, no vapor barrier, no air ...
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Corrosion on copper pipes due to insulation (with foam)

My incoming water pipe is copper and it is a brand new installation with no leaks. But due to the hot humid weather (even in the basement) it sweats due to condensation. Should I insulate it? The ...
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531 views

Can I use Rigid Foam Insulation instead of fiber insulation?

I have a question: Can I use Rigid Foam Insulation instead of fiber insulation on outside walls from the inside of the house?
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3answers
4k views

Should I drywall and/or insulate my garage wall?

I'm in the process of a few projects in the garage, including raising the ceiling and insulating with spray foam. This has left me with a fair amount of leftover fiberglass batts. There is a room ...
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662 views

Does my wood stove pipe have to be chrome to be safe to use?

I'm currently renting a house that has a wood stove, and figured that as it's used as a rental property, the stove would be safe to use. However a friend of mine today was telling me that if the ...
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2k views

How do I repair a drywall ceiling when there is blown in insulation above?

I was finishing the space above a garage. The space was buried in blown in cellulose insulation and we framed in some walls, laid a subfloor, and finished the room. During framing two different ...
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114 views

Is it safe to put insulation next to knob & tube wiring?

I have a room that has some really ugly cheap panelling on the walls. I want to rip it out & replace with drywall. While I'm at it, I'd like to add soundproofing insulation between rooms & ...
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1k views

What can I do in this vented crawlspace to keep the room above warmer?

I've recently moved to a new home. This home had an addition that was built on top of a Crawlspace that is vented to the outside. Needless to say, the morning after the first cold night made me ...
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How can I insulate my garage?

My sister's garage gets very cold and very hot as it is not currently insulated. She has the heating/ac unit in there as well as a deep freezer. The attic space directly above the garage has no ...
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276 views

Using metal paint can as cover for non-IC rated recessed lights

Do you think using a 1 gallon metal paint bucket as a barrier in the attic over 3" non-IC rated recessed lighting will cause any heat problems? I've been looking for ways to keep the blown in ...
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2answers
524 views

Will this moisture problem persist after drywall is installed?

we remodeled a trailer home recently, removed the aluminum siding, put up osb in place of the siding, then used the Lowes brand of house wrap. we installed new vinyl siding over that without using any ...
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468 views

Are there any DIY polyurethane foam insulation options available?

I recently had a leak (hurricane Sandy) in an "eave"-like space that required the removal of a part of my drywall ceiling. All of the insulation that was above the ceiling was drenched. To replace it, ...
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What is the best way to insulate a room with glass window for winter?

Winter is approaching and I have heard that some people insulate glass windows and balcony doors during winter to preserve heat. What materials can I use to do this? I am living in a rented apartment, ...
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2answers
464 views

Is it worth updating my insulation?

I have a 1969 Cape Cod 2,300 square feet, brick and vinyl sided home with cathedral ceilings that I want to update insulation in. I have the original R-7 fiberglass in the walls and R-12 in the ...
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1answer
2k views

Should I add a vapor barrier to kraft faced insulation?

I am redoing our master bath. We completely gutted the room, and I have two exterior walls with R13 kraft paper faced insulation. Should I add a 6 mil plastic vapor barrier to the walls? Would it trap ...
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How can I insulate a sash window?

I just moved into an old flat which has old and weathered down sash windows which let a lot of cold air in. As Scotland does get very cold at times I would like to insulate them in a cheap and ...
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5answers
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How can I block or fill out a letterbox hole in my door?

I have a letterbox in my front door that is never used, so I would like to remove it and fill the hole, preferably so it doesn't look like there was ever one there. Or insert something that fills the ...
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543 views

Is this insulation supposed to be there?

I was adding some insulation foam into our fireplace as a way of stopping drafts from the chimney. It's obvious that it's installed so we won't ever have it there when a fire is lit (we have not yet ...
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543 views

Can I add unfaced insulation on top of faced insulation which is on top of cellulose?

I want to roll out some additional fiberglass insulation in my attic. Currently there is loose cellulose with faced fiberglass batts placed on top of the cellulose. The facing is facing out as in ...
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2k views

How should I insulate around pipe/cable holes in drywall?

Notice the gaps between the pipes and the drywall in the pictures above? These gaps appear in both the walls and the ceiling, and I feel like in at least one case, I've noticed a difference in air ...
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2answers
2k views

Should I cover a skylight well from the inside?

I made the mistake of having a Velux skylight installed in my bedroom. The installation was done by pros, both inside and out, and it has never leaked through 2 hurricanes. The installation was done ...
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862 views

What should I do about this possible mold I found under paint?

I live in Austin, Texas, which is important in that we don't receive much rain, and it's not very humid. I was peeling paint off of the old drywall, and found what appears to be mold on the bottom of ...
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574 views

Should I install vapor barrier in a seasonal cottage?

I am installing drywall in the bedrooms of a seasonal cottage in northern Ontario. It is unheated in the winter. The cottage is insulated with R14 insulation. Will the installation of a vapour ...
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404 views

How can I block air flow into floor joists in knee wall attic?

I purchased an 55 year old two story home. Upstairs there is a knee wall attic space. There is air coming into the joist area and out of the pot lights downstairs. I can feel the cold breeze with ...
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403 views

My kitchen has no real walls. Is this going to be a problem?

I recently redid my kitchen, which included removing the back splash and putting in new tile, but when I went to remove the old tile, I found that the tile is only attached to drywall. Knowing this ...
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346 views

Extra insulation for panes of aging windows

The original windows on my 30-year-old house are insulated pretty well around the frames, but the panes themselves transmit a lot of cold air, especially when things drop down into the single digits, ...
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147 views

Do I need a replacement attic vapour barrier after asbestos removal?

I recently had our Zonolite vermiculite asbestos professionally removed. The company used a large vacuum truck to remove it. They also ripped out the 6mm plastic vapour barrier in the attic. They ...
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2answers
857 views

Do I need to replace soaking wet insulation resulting from a plugged A/C drain?

I had a company install an A/C evaporator unit on my existing heating system. A plugged drain caused the plastic pan inside the evaporator to overflow with water, which then ran out through the metal ...
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465 views

At what temperatures do pipe sleeves protect pipes from freezing?

Pipes start icing at 20ºF and below. Down to how many ºF do the foam sleeves protect the pipe? The foams I placed in my outdoor pipes had a 0.35" thick polyurethane foam surrounding them. This is a ...
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197 views

How can I prevent aluminum window frames from heating up when they're in full sun?

There is a room that has a window, the frame of the window is made of aluminum. This window is subjected to direct sunlight a long time of the day, which makes the aluminum get really hot, and start ...
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774 views

How do I insulate interior basement walls that are not against the exterior walls?

I'm in the process of building an office and family room in my basement and need some help with the walls and insulation. There is a perimeter drain in the slab around the exterior walls that ...
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1answer
92 views

How do I provide proper fire protection in this situation?

HVAC guys are running a vertical duct (supply and return) from my basement to my 2nd floor attic. It will run adjacent to an exterior wall and will eventually be enclosed in a drywalled-in vertical ...
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242 views

What kind of pipe insulation is appropriate for sun exposure?

I want to insulate a water line outdoors, where it will be exposed to sun. I expect that UV light will damage many foam pipe insulations over time. Is there a type of insulation that will tolerate ...
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2answers
588 views

How can I insulate the floor of a room above a porch?

I've been searching around for an answer or pointers on this for a while, it's possible I'm using the wrong phrases when searching! I have a UK 1930's built semi-detached house, Streetview pic before ...
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1answer
487 views

How do I raise my garage ceiling after spray foaming?

I'm starting to add central vac to my house, which mostly involves pipes in the garage. I cut a hole in the garage ceiling (drywalled) to check things out, and found there's an 18" up to the bottom of ...
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Is torn kraft paper vapor retarder in the attic a problem?

I'm adding additional insulation in my attic. Unfortunately, I tore the kraft paper vapor barrier of the existing fiberglass insulation in many places while air sealing. Is this a problem? Or is this ...
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559 views

Worthwhile to insulate basement ceiling while remodeling?

I have an existing finished basement where I'm in the process of replacing an severely damaged plaster ceiling with drywall. I've got the entire thing open, and as it's an old house (1925) there is ...
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434 views

Is it a good idea to put 1/4" XPS under engineered floors?

We're pulling out the carpet in a room next to a room with hardwood floors. After removing the carpet and putting down the engineered floor, we'll be 1/4" short of the hardwood. Options: Use ...
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1answer
165 views

Should I have my old ceiling vacuumed before installing insulation?

My house (built about 1890) has no insulation in the roof and so I plan to put in insulating batts. There is a lot of old dust and a few possum droppings up there, and I have heard that the dust can ...
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736 views

Should I apply rigid insulation between existing basement framing?

I'm replacing wood paneling in my basement with drywall. There are 1x furring strips attached to the cinder block and covered with tar paper, and the wood paneling was attached to those strips. ...