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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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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0answers
426 views

Should I install drywall or plywood above a drop ceiling to increase the insulation value?

I am currently insulating a new room in my house. I am planning to put up a drop ceiling. I have insulated between my roof trusses. Do I need anything else between my drop ceiling and attic space ...
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1answer
138 views

Why am I getting condensation on vapour barrier?

I installed some vapour barriers on the windows recently due to it getting a bit cold, but have been noticing that I've been getting a fair bit of condensation on the inside facing part of the ...
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1answer
752 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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2answers
6k views

Is it more effective to insulate the walls, or ceiling of an unheated basement?

We have a new house, well built, spray foam insulation, tight seals. My daughter's room is over an unfinished area of the basement and is COLD this winter. There are vents in the unfinished area, ...
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3answers
10k views

What is a good solution for hiding insulation in an unfinished basement?

First off, let me note that I am a tenant in this house. My landlord lets me do small improvements, but I'm not going to finish the basement with drywall myself. Basically, we have an unfinished ...
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1answer
532 views

What is the best way to install insulation batts in an attic?

As far as we can tell, the attic is laid out like so - first is the 2nd floor ceiling, then whatever material is right above that, then the attic joists, then there is plywood nailed to the joists, ...
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2answers
13k views

What are the differences between hot and cold roof systems?

Can someone explain the differences, pros and cons of a hot roof vs a cold roof? I would like to vault a ceiling in an addition off of our family room, taking the drywall all the way up to the roof ...
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1answer
798 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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1answer
268 views

What specifications should I look at when choosing an exterior door?

I'm considering replacing the front door, and I'd like to know what to look for to get the most insulation. When shopping for doors, I'm not sure what I should be looking at to determine which doors ...
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2answers
4k 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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2answers
944 views

Is dirty batt insulation on attic floor a sign of air leakage?

My attic is 530 sqft, with soffits, ridge vent and some 18"X18" window with mesh over it (I cant recall its name). The house was built in 1960 and has batt insulation on the attic floor. The batt ...
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1answer
783 views

How to properly seal the transition between basement wall framing and spray-foamed box joists?

We're looking at insulating the box joists of our concrete foundation. We have 2x3" walls framed which are holding batt insulation, which are 3-4" away from the wall (to accommodate a layer of batt ...
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1answer
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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2answers
7k views

How do I properly insulate an attic ceiling?

I'm considering insulating my attic ceiling using a foam kit. Doing a bit of research tells me that air sealing and proper ventilation are key I live in Long Island NY and currently have about R-19. ...
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1answer
726 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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4answers
13k views

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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3answers
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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2answers
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Can I install recessed lighting in vaulted ceiling with 6" rafters?

I would like to install recessed lighting in my vaulted ceiling. One contractor I spoke with suggested not doing that because the rafters are shallow (only 6 inches), which does not leave much room ...
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3answers
1k views

Is there any reason not to use a radiant barrier in the attic?

i am considering putting up a radiant barrier in my attic, with a product like AtticFoil, to 1) reduce the attic temperatures as my A/C ducting is in the attic and 2) to reduce heat convection into my ...
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3answers
1k views

Is radiant heat in a concrete floor unpleasant in a super-insulated house?

While reading about superinsulation, I came across the idea that a radiant concrete floor is a poor choice if you have really good insulation. The reasoning goes like this: In a regular house you ...
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1answer
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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3answers
1k 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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1answer
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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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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1answer
566 views

How can I replace ceiling gypsum board and loose fill insulation at the same time?

I lost most of a ceiling panel due to water saturation and collapse. It was removed along with insulation residue and a temporary fiber board panel tacked in in its place. Now I would like to install ...
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4answers
6k views

How should I insulate the walls and ceilings of this 1920's semi-detached brick house?

I'm renovating a 1920's semi-detached house. The plaster on the walls was slapped straight on the wall about an inch thick, and the ceilings were lath and plaster which had been overboarded. Most of ...
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3answers
548 views

How do I insulate exterior basement wall?

Working from scratch with a bare wall. What do I do? 3 hardware stores have told me 3 different things. We have very cold winters here. Looking for cheapest and highest R value. contractor next door ...
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5answers
4k views

How can I insulate a basement wall that has 1x1 framing installed on it?

It is freezing in my basement so I decided to re-insulate my daughter's bedroom. I removed the old paneling walls to find that it wasn't insulated! There was a water barrier and a heat shield. My ...
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2answers
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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1answer
1k 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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1answer
6k views

Can a new ceiling be build directly onto an old one

I would like to build a new ceiling on to an old slightly sagging and poorly finished ceiling (peeling paint and no joint plaster used). I see this way as more convenient and less messy than ripping ...
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1answer
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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6answers
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How can I insulate my attic on a tight budget?

My attic is running 135Fahrenheit (55 Celsius) and more right now. And that's before it even gets to the hottest part of the day! The A/C guy said the A/C's are working perfectly. But he tested the ...
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3answers
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Is styrofoam good for attic insulation?

A neighbour is trying to sell me some of his leftover styrofoam insulation. I need to insulate my attic. Is styrofoam a good insulator, or should I use another type of insulation?
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1answer
156 views

Is a sealed attic appropriate for Southern California?

I have a two-story house. Half the house has a cathedral ceiling (which will be left as is) and the other half has a traditional attic with no soffits. The only ventilation in the attic comes from two ...
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1answer
4k views

Does it do any good to use fiberglass insulation if you're not going to drywall?

My attached garage is not insulated. When I look up, I see the roof sheathing. I was thinking of adding insulation to the garage. The problem is there is no attic space, so I shouldn't drywall it ...
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3answers
8k views

How should I insulate a bedroom in the attic?

After doing lots of research and reading lots of different opinions I would like to know what is the best way to insulate and vent a 1 1/2 story house that has a bedroom upstairs in the roof/attic ...
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1answer
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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2answers
288 views

Check heating pipes for thermal leaks

I would like to check basic thermal leaks of the house heating system (and perhaps the house thermal insulation as well). As the professional services or equipment (thermocamera) are very expensive, I ...
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1answer
212 views

How do I replace insulation in the corner?

I'm re-insulating a room in my house, and have come to the corner. The studs are arranged like so: x| | | - - x = the space I'm talking about, | = studs of an interior wall, - = studs of an ...
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1answer
725 views

Could space above a drop ceiling and below sound absorbing insulation increase echo in room?

Our builder has asked whether we have any objection to his laying sound insulation on top of the suspended ceiling he's going to install, rather than attaching it to the actual ceiling above. He ...
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1answer
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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2answers
2k views

How can I floor my loft without compressing the insulation?

I want to board over my loft for storage, but before I do I ought to improve the insulation which is very old and thin. My UK house is 105yrs old so the rafters are not as high as the recommended ...
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3answers
5k views

How can I determine why my A/C runs all day?

I have a Bryant AC/Furnace unit. My house is 10 years old. A heat wave hit this weekend & temps got up to 95°F outside. I had my thermostat set to 75°, and it ran all day. The ...
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1answer
388 views

How can I insulate my attic in southern California?

I live in Southern California (San Bernardino county), and I'd like to add insulation in my attic. cathedral ceiling; 1/2 of entire roof has no attic space how do i insulate this space? the other 1/2 ...
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3answers
960 views

How do you calculate if it's worth it to insulate?

We live just north of NYC, and the house was built in 1906. We're putting on a new roof and trying to figure out if it's worth it to insulate too. It's a cathedral ceiling on the inside, and we do ...
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2answers
459 views

How is this type of weather stripping replaced?

This weather stripping is about 20 years old, and obviously it's no longer doing anything. It seems like it's stuck between those pieces of wood, but I can't tell if it's glued in, or if there are ...
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2answers
944 views

How to best insulate an exposed waterpipe during the cold season

i have an exposed (out of the ground) water pipe and during the night freezes over. What is the best way to insulate it so it does not freeze?
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3answers
10k views

Should I insulate a finished basement if there is only 3 degrees difference?

We are finishing our basement and I'm wondering if it is worth putting in insulation if there is only a 3 degrees temperature difference from my upper floors to my basement. This is during the winter ...