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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Semi-finished basement, water-resistant “baseboards”?

I'm planning on applying foam-panel insulation over my basement's concrete wall. I'm told a fire barrier is required over that, either plasterboard or decently-thick plywood. I've been considering ...
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Adding insulation to exterior wall; remove stucco cladding, or add on top of it?

I have an exterior stucco wall that's not in super great condition. The outermost-layer was applied very badly and is flaking off, so doing a patch job or yet another layer seems like a bad idea ...
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2k views

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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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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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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41 views

Should there be a gap when adding insulation in a wooden outbuilding?

I'm currently in the middle of a home office project. It's a simple wooden outbuilding and I'm insulating it with polystyrene sheets. Once they are in, I'll go over them with with some tongue and ...
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Should I wrap home in Tyvek when re-siding?

My house was built in the 60s and doesn't have normal plywood sheathing. It has that old sheet-rock-like sheathing (it's black, I think it is exterior gypsum). Basically the walls (right now) go, ...
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697 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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1k 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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725 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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586 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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4k 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 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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1k 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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76 views

Will batt insulation ignite if it is laying against my steam pipes?

I have steam pipes behind a wall that I loosely packed R30 batt insulation against. Is there a possibility that the insulation will ignite?
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765 views

How can I insulate a room without tearing down walls?

The kitchen in my Philadelphia row home seems to have been a last minute idea. After last winter, I'm almost certain there is no insulation installed in the room. Is there a way for me to do something ...
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213 views

How do I improve the insulation in a vaulted ceiling?

I live in a twenty year old Florida condo quadplex. The upstairs ceilings are two by four trusses of a mansard roof. I have replaced the ac, wall insulation, ducts. An IR thermometer shows huge heat ...
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751 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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4k views

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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1k 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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4k 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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2k 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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1k 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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593 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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490 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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95 views

What to insulate first? Attic, walls, kneewalls?

I know a number of people in a similar situation that want to add insulation to older, poorly insulated homes. Homes are similar. Poorly insulated attics (6" of fiberglass batts), no insulation in ...
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75 views

Best way to stop boiler steam from entering attic

I have a cape cod. The boiler is in the basement and vents to the outside about a foot above ground level. I get a considerable amount of snow melt and ice buildup in the attic section directly ...
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Can I remove the framed wall on the outside of my basement?

I have a 20 year old house (which is a basic colonial box). The basement has a standard poured concrete exterior wall. Against the concrete exterior wall, they framed a standard wood 2 x 4 wall, ...
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2k views

Rim Joist Insulation without a Sill Plate

I've seen a few similar questions but the answers don't add up... I would like to use some rigid foam insulation to insulate my rim joists. Here is the problem: everything I have seen shows putting ...
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345 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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3k 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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4k views

How can I install soffit vents from the outside?

When we moved into the house we live in there was literally no insulation in the attic. We have a 4 1/2 pitch roof. We live in Texas and our first electric bill in a 1450sf house was almost $500. ...
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642 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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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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100 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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1answer
406 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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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
1k 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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910 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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294 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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1k 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. ...
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1answer
879 views

Reducing Attic Fire Risk

When I had my house built, it got cold and so we called the local power co-op energy savings expert to give us advice. One of the things he said was that we had the wrong kind of insulation in the ...
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How do I insulate around a gas fireplace without tearing it apart?

My home has a gas fireplace that we do not use very often. It is in a "bump out" on the back of the house. In the winter, cold air flows through the vents under the fireplace and if you feel the ...
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278 views

How can I air seal around a brick chimney with a metal flue liner?

We have a 1954 brick chimney that has a metal liner inside and is only used by the natural gas hot water tank. It's had fiberglass right up against if for guessing 20+ years. I'm air sealing the ...
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119 views

Can I install insulation on the ceiling of an old unfinished basement?

Can I install insulation on the ceiling of an old unfinished basement? I have a bungalow home with hardwood floors.
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1answer
127 views

Wisconsin Basement Finishing questions

Last year I decided to let my brother-in-law finish my basement. After he finished the framing he moved away. Now I have wood framing complete and nothing else. He claimed he knew what he was ...
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179 views

What is the proper way to insulate a cantilevered bay?

I have two areas of my house which are cantilevered. One is a bay area which extends about 2'. The other is the bottom of a fireplace box (gas fireplace). I have placed two layers of R-13 (I think) ...
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85 views

How can I repair a bathroom fan under garage that is leaking in the winter?

I have a rigid metal exhaust pipe coming out of the bathroom fan over my downstairs bathroom. It goes up at approximately a 30 degree angle for about twenty feet and stops just before it gets to the ...
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50 views

What is the best way to subdivide and heat a large room?

I live in a large room and would like to subdivide my room, such that it can be heated with a space heater/small mobile radiator. I live at the end/corner of a large L shaped room, with concrete ...
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116 views

How do I dry up a stucco wall that presents efflorescence?

I have determined the source of the water and I would like to believe that I stopped that with a temporary fix (a large tarp that will cover my patio which used to collect water at the base of the ...