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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3k views

How do I retrofit a junction box in an insulated wall?

Typical cold climate construction: Drywall, 6mil vapour barrier, fiberglass batt insulation. How do I retrofit a junction box and maintain the vapour seal? To be clear, by 'retrofit', I mean the ...
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2answers
590 views

Can I sheetrock over styrofoam on a garage ceiling?

I am buying a home with a detached garage that the original owner insulated. The garage is probably 25 years old. At the time of construction, 1" expanded foam was nailed directly to the rafters to ...
2
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1answer
109 views

Will closing the ventilation windows in my garage cause problems for my water heater?

I have a room directly above my garage and it's usually 10+ degrees difference in temperature compared to the rest of the house. I'm planning on insulating the door and the garage ceiling with rigid ...
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1answer
424 views

How should I mount external hardware to a Greenboard/EPS exterior wall?

The external cladding of my house is rendered NRG Greenboard (an EPS product). What is the best way to mount simple external hardware (specifcally, a hose reel) to this material? The reel itself just ...
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1answer
245 views

How can I insulate my attic conversion, without pulling down the plasterboard?

I recently purchased a house, and it has an attic conversion. Once winter came along we found out that there is no insulation between the roof and the plasterboard. Does anyone know of a way I can ...
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2answers
2k 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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3answers
3k views

Can my drywall act as an air barrier?

I am preparing to improve a building in a cold climate zone. Since it does not seem to be properly insulated, I am reading a book about insulating and weatherizing. That teaches me that I should ...
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1answer
335 views

How should I insulate behind the last floor joist that runs parallel to the foundation wall?

As an aside, I can't for the life of me figure out what to call the last floor joist that runs parallel to the basement foundation. Does it have a name? In my house, there is a little cramped gap an ...
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2answers
2k views

How do I fix air leak in windows?

Our windows in the back of our house receive a lot of wind. When it's windy or very cold, the air is coming in through various crevices: window track and space between window. The windows are about ...
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1answer
89 views

What type and rating of insulation should be used in a basement bathroom?

I need to replace the insulation on the back and side of the bathtub. The walls face the exterior of the house (poured foundation). What type and rating should I use? I can't tell what the ...
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3answers
1k views

Will plaster on basement walls and ceiling provide insulation?

My basement's insides are completely unfinished. It has bare brick walls and bare concrete beams-vaults as the ceiling. I though of coating the walls and the ceiling with 2 inch thick plaster with the ...
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3answers
9k views

How should I use fiberglass batts to insulate between floor joists over a stone basement?

I have an old home built on a stone foundation. The stone foundation is solid, as well as the floor joists. I run a dehumidifier in the basement full time, to keep the air moisture low. There is ...
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2answers
8k views

Should I add batt insulation to concrete basement walls?

We're planning how to finish our basement, and haven't been able to figure out something related to insulation. The home's in Minnesota, and was built in 2008. XPS insulation (installed by the ...
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2answers
868 views

What are some cheap (and landlord friendly) ways to fix a drafty flat?

The worst affected seems to be my room. It is the end of the turret with a massive vent (now gaffa-tape sealed) I will be sitting by the wall and actually feel the freezing cold air against my neck ...
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1answer
435 views

Can I increase the efficiency of a refrigerator by replacing the door insulation?

I am in the process repainting the refrigerator doors, and cleaning up the rust on the inside of the doors. The question is, would I increase the efficiency of operation by replacing the original ...
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1answer
211 views

Can I insulate over 1/2 in. styrofoam?

We have a rec room (basement) from the 60's that we are redoing. Currently on the outside walls, they have 1 x 2 studding then 1/2 inch white styrofoam then vapour barrier. WE are wondering if we ...
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3answers
3k views

What options are available for insulating interior walls myself with minimal damage to the wall?

United State | California I'd like to insulate the interior walls in my house using a minimally invasive method. My understanding that is that "blown-in insulation" requires specialized equipment ...
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2answers
2k 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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0answers
767 views

Do I need to add a protective layer to insulation for wall heater?

I am going to install a 4000 watt wall heater to an add on. It is the kind of wall heater that is seated in the wall. i also plan to install insulation in between my wall studs. there will be ...
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1answer
102 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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2answers
983 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
928 views

Will sealing off rafter spaces and unusable spaces help my attic insulation plan?

I am trying to warm an exercise floor in an unfinished attic and save on heating at the same time. I want to evaluate whether covering the rafters in my attic with various materials will be worthwhile ...
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1answer
828 views

How can I improve the insulation in the lower attic space?

I live in a house with a finished attic. There's a substantial upper attic (big enough to walk around) and there are also knee walls between the upstairs rooms and the lower attic. There is ...
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1answer
984 views

How can I insulate an area without an attic above it?

My laundry room and a walk-in closet are freezing cold. They're on the ground floor in part of the house that is single-story. So, there is no attic above them. How do I insulate these areas when ...
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2answers
2k views

What's behind my plasterboard?

We've just moved house, and I've never had to deal with plasterboard before. I'm in the UK, and the house is about 10 years old. My understanding was that behind the plasterboard would be a gap ...
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2answers
5k views

How should I use heat tape?

I've been considering using heat tape this year, to protect my pipes from freezing. Are there any suggestions for the proper use or installation of heat tape, or pros/cons?
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1answer
567 views

How to insulate sloped top of concrete block foundation?

I am planning to insulate the inside of my basement. I have a concrete block foundation. I am planning on going XPS board route, applied directly to wall with foam/tape on all the seams to make it ...
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3answers
4k 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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3answers
3k 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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1answer
141 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
768 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
551 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
14k 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
838 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 ...
4
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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
983 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 ...
6
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1answer
823 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 ...
3
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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 ...
2
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2answers
8k 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. ...
3
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1answer
737 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 ...