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 can I insulate behind pipes that are close to a foundation wall?

Reading around, it seems like most people suggest to put up XPS insulation when finishing a basement. That's great and all, but how do you put 2" of rigid foam behind pipes that already exist in the ...
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1answer
81 views

Can I properly install Roxul mineral wool batts in a mostly-drywalled stud bay by pushing them up from below?

Using my nifty thermal camera, I discovered that my furnace closet's combustion air duct (visible in this question) is getting really hot when the attic heats up, and then (being sheet metal) it ...
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2answers
275 views

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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2answers
42 views

How to check the type of installed insulated glazing

In the Netherlands, insulated glass is rated by a standardized rating system, classifying it into 3 categories by the u-value: HR : U value between 2.0 and 1.7 HR+ : U value between 1.6 and 1.3 ...
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1answer
72 views

What type of insulation can I use to insulate around my furnace exhaust?

I've got a cold breeze blowing through my basement, originating from where the furnace exhaust turns vertical. What type of insulation can I stuff in around the exhaust, to stop the cold air? This ...
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2answers
79 views

Recommended method to insulate a raised (joisted) floor in the UK?

We're just about to get a new wood-burning stove fitted with an external air feed and have a load of squeaky floorboards which need fixing in the same room, so we're planning on taking the floor up. ...
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1answer
182 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
3k 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
3k 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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4answers
2k views

What to do with a cold corner?

I live in an apartment on the 4th floor. My bedroom has the misfortune of being in the very corner of the building - it has two outer walls. On top of that, the corner between these two walls is ...
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3answers
805 views

Vented vs unvented crawl space

I've asked this question before: Vented vs unvented crawl space However, now that I'm going to get air conditioning the question comes back again and again people seem to have different opinions. ...
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2answers
2k views

How do I determine what supplies to buy to insulate an attic?

I would like to add more insulation to an attic. What measurements and points do I need to look at to decide what materials to buy? How do I determine if I need airflow baffles? How do I determine ...
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1answer
87 views

Can I insulate between a brick chimney and drywall?

Can I insulate the space between a brick chimney and the drywall inside my home? I am getting heat transfer from the brick to the drywall in the summer from the sun heating the brick. My thermostat ...
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1answer
65 views

Is rigid foam on rim board in basement worth doing if walls aren't insulated?

We bought an older home that we use more as an office. The basement is totally uninsulated including the rim joists. Last winter, it got really cold down there to the point that the floors upstairs ...
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1answer
692 views

What can I use to adequately insulate round rigid metal ducts?

I'm installing properly sealed round metal ducts in my unconditioned attic for heating and cooling. I've probably got 100' total of 6" duct to cover. I'm trying to achieve an R-8 insulation value, ...
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2answers
161 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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1answer
84 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
381 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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2answers
616 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
324 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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1answer
287 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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1answer
211 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
383 views

How do I insulate my Laddomat 21 boiler charger?

I have a mixing device Laddomat 21 installed for my boiler + accumulator tank. I have all pipes around the boiler insulated with pre-formed moulded mineral wool insulation, but there is no insulation ...
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3answers
701 views

What is the best way to seal this old fireplace vent?

I am doing some minor renovations to my basement with the drop ceiling and found that one of the geniuses that owned the house before me, used fibreglass ceiling tiles to seal off an old vent for a ...
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1answer
343 views

How do I deciding whether to install an attic venting system?

I live in Colorado, and the weather is starting to warm up. In a couple months, the temperatures will rise pretty high. Thankfully, I have a well insulated house (there is over 20 inches of fiberglass ...
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1answer
166 views

How do I lower the temperature of an electric boiler in France/Europe?

My electric boiler is delivering VERY hot water: my hands are often burned when I forget to mix it with normal-tempered water. Do you think there is a way I can make the boiler heating the water ...
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2answers
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Is a vapor barrier necessary beneath blown in cellulose insulation in a garage ceiling in a cold climate?

Is it necessary to put any kind of vapor barrier beneath blown in cellulose insulation in an attached garage? The ceiling is sheetrocked, but that's it. It's a cold, dry climate (north half of ...
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1answer
39 views

What's the best way to insulate an outdoor sauna?

I am designing a 4'x4' sauna. Most information online is for indoor saunas. From what I've gleaned, the layers should be (for example): Outside ––> cedar exterior ––> tyvex ––> strand board --> 2x4 ...
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6answers
2k views

How do I keep my house cool especially my terrace during summer?

I live in Bangalore in an apartment on the top floor and during summer, my terrace (built of concrete) absorbs a lot of heat. When I come home and switch on the fan, it ends warming my room and it is ...
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2answers
73 views

Looking to improve acoustic and thermal performance before relaying wooden floor

We are about to lay new wood floor in the entire upstairs of an old Victorian house. This seems like the perfect opportunity to acoustically (and thermally) insulate the floor to separate it from ...
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195 views

How can I insulate and elevate an A/C line set on a flat rubber roof?

The Scenario An apartment building with a flat black rubber roof. The A/C condenser is on a platform on the roof with an air handler inside the unit. The line set runs across the roof for about 20 ...
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3answers
75 views

How can I insulate my basement on a budget?

I have a home built in 1925, a "Chicago Bungalow" style, in Louisville, KY. I have roughed in the basement, trying to take advantage of every square inch. I am planning on using it for short-term ...
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557 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
626 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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2answers
376 views

What can I use to fill a 6-10mm gap between ceiling and front door structure?

I live in a 1930s house with a small, open porch (as in no external door) in front of my main UPVC front door. Not long ago, the original lath and plaster ceiling in the hallway fell down quite ...
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2answers
196 views

How to create a conditioned attic?

My attic has reached the point of no return with storage. I must use it for that purpose. So now I have to find a way to insulate the attic's roof. For this DIY handyman dad, does anyone know of a ...
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2answers
1k views

Are there any types of tile with insulating properties?

Is it possible to buy insulating indoor wall tiles? I have just bought a house and am in the process of slowly renovating it. The bathroom is an extension that was added to the house approx 40 years ...
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3answers
152 views

Gutted a basement and found a window, what should I do?

I recently gutted my basement in an early 1900s home that was finished in the mid-80s, and discovered a window! This window is directly under my front door, hidden by a deck that I've never really ...
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145 views

How well does masonry blocks used in European home construction insulate compared to a well insulated American (wood) wall?

Are there any equivalents to the Building Science insulation reports done for the US/Canada done in Europe? I spent the last few weeks going over some properties that I will be rehabbing in France ...
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1answer
88 views

Can I create a false ceiling using XPS board instead of gypsum board?

I want to install a false ceiling on the top floor in the classrooms of a school. I have installed a grid structure and now, instead of using gypsum boards, I want to use XPS insulation boards of 1" ...
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140 views

Preventing a frozen pipe on an extreme weather night

Last week, we had a night that got down to -18F. In the middle of the night, the cold-water pipe going to the kitchen sink froze (but luckily did not burst). After some investigation, it turns out ...
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1answer
385 views

Additional Vapor Barrier with Faced Insulation?

When installing faced insulation into exterior walls, are there any benefits or detriments to adding an additional vapor barrier to either the non-faced side of the insulation?
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41 views

Quick and cheap insulation for skylight

I just moved into a condo and on the top floor there is a skylight window. The room gets pretty hot during the day, I have friends coming in town this weekend and I would like a cheap and quick fix to ...
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1answer
47 views

How to keep an attic over the garage cool?

The space over my garage is dominated by a large dormer, which I use as my office. On either side of this dormer, the remainder of the over-garage area is attic space. We have access panels into ...
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1answer
335 views

Should I install a vapor barrier on the bottom of my garage ceiling?

I have a house that has a garage below the main floor. The house is built into a hill, and so the entry way, the basement, and the garage are all on the same level, and the entry way has a stair case ...
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1answer
127 views

Stop heat loss through unused chimney duct

We had a 10 inch diameter metal chimney duct running from the basement to the roof. After replacing the furnace with a direct vent one it was no longer used. Cue more renovations and the section on ...
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373 views

What type of insulation has the highest R value per inch?

I am trying to find the best insulation for my apartment. The limitation is that space between the drywall and the ceiling is 1/2". I live on the top floor of my building.
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What can I do to reduce cold infiltration by a direct-vent gas fire place?

My home has a direct-vent gas fire place on the ground floor, and each winter the area around the fire place inside the house becomes very cold (granite finish). On colder days, the carpeted floor ...
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3answers
2k 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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694 views

Will installing an OSB floor in the attic create moisture problems?

I installed some new OSB flooring in my attic. The area it covers is about 160 sq. ft. The total area of the attic is about 750 sq. ft. There is just blown fiberglass up there, and there is no vapor ...