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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Will insulating pipes shorten the time it takes for hot water to reach the faucet?

Ok, so I took a few weekends and totally insulated all hot water pipes I could get access to from the water heater. Now, I still wait approx 90 seconds for hot water to reach the farthest faucet from ...
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2answers
3k views

Why did insulation and vapor barrier cause mold in my storage shed?

I recently installed insulation in my garden shed and covered it with a plastic vapor barrier. This was done in the summer when the weather was warm and sometime humid. Shortly after I'd finished ...
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1answer
126 views

Insulate and fill hole in wall that was for cables?

Great Stuff doesn't look ideal, since it's going to get a lot of sunlight on the outside, and Duct Seal doesn't say anything about whether it actually insulates. Also, the Duct Seal material safety ...
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2answers
2k views

What could be causing my bedroom to be so cold, and how can I make it warmer?

I live in a two story townhouse with a basement. This summer, they replaced the furnace and air conditioning unit. Last winter I put 3M film over the windows to help with drafts and it worked great, I ...
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1answer
994 views

Should I install vapor barrier in my basement bathroom?

I have a brick house built in the 1920s. I'm installing a bathroom basement based on an existing layout, but I'm trying to keep the "wet" side (mechanical room with hot water heater, etc.) physically ...
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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
9k views

What type of tape is used to seal vapor barrier seams?

If I was installing vapor barrier in Canada, I'd use Tuck® Contractors Sheathing Tape. However, after a trip to the local Home Depot (USA), I came up empty in my search for Tuck Tape. I did find ...
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2answers
1k views

What is used to seal around glass in fireplace doors?

The glass in my fireplace doors have felt-like strips layered in between the glass and the metal framing of the doors. I recently had to have a piece of glass replaced and they lost the strips. Now ...
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0answers
199 views

What should I do about the insulation in my basement?

So in my basement I have insulation that was put up by the builder. My first question is what is this type of insulation called? The second question I have pertains to finishing the basement. I ...
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6answers
23k views

How can I seal the large gap around my fireplace in a way that is safe and prevents air inflows?

I've got a spot by a fireplace that lets cold air in. Unfortunately its right where the metal of the fireplace meets the wooden framing/molding of the fireplace on the inside. This seems like ...
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2answers
304 views

Can I add rolls of unfaced insulation to increase the R value of my attic insulation?

I live in a two story home that is approximately 150 years old. The attic floor is constructed with large beams and old wood planks laid across the complete surface area, rendering the attic useful ...
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1answer
83 views

Can I insulate under my condo's subfloor?

My condo does not have a basement. I have a subfloor with three dummy registers. I don't know why they are there. My heating ducts are in the upper part of the side walls. In the winter the cold ...
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3answers
27k views

What can I do about a room over the garage with temperature problems?

I'm learning many things about our new home. This winter I learned that a room directly above a garage stays much colder than the rest of the house (up to 10+ degrees colder in our case). What options ...
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3answers
1k views

Do I need an air space between insulation and flooring in the attic?

As part of a local council grant, I am getting my attic floor insulation (2 inch thick fibreglass) replaced with 4 inch thick insulation. It will lie between the joists, on top of the plasterboard ...
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2answers
308 views

What should I do with insulation in basement ceiling?

I am fixing up my basement, and to make it seem bigger- we decided to remove the drop ceiling and are going to have the exposed ceiling and duct work sprayed black. There is some insulation around ...
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3answers
700 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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3answers
5k views

Should I use Tyvek or tar paper on basement walls?

We are going to be redoing our basement which was done in the 60's and very cold. We have been told to apply Tyvek or tar paper to the walls, stud, then vapour barrier and drywall. We plan on using ...
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1answer
479 views

Insulating attic ceiling and looking for synthetic t&g ceiling boards

We have a 3/4 upper floor room that is in desperate need of a complete overhaul. The current ceiling consists of 2x4 ceiling rafters with a foam vent and perhaps 2.5" of foam insulation, then the ...
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4answers
652 views

Can I paint over XPS insulation?

I've a top floor apartment in India which gets almost like an oven during the summers which is like for 9 months out of 12. I've decided to apply under the deck XPS 50mm (nailed to the ceiling). I ...
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3answers
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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1answer
410 views

What is good advice for a beginner layng insulation?

Background I have a manufactured home from the 70's with metal siding, wood studded walls and fiberglass insulation on the inside. I had a clogged gutter, which caused water to run behind the siding, ...
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0answers
188 views

Do I need a vapor barrier between the insulation and finish wall in a new garage?

Can I put plastic between the insulation and finish wall in a new garage? Or would we gain anything by doing this? We have some who told us to do this and others who say definitely do not. There is ...
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2answers
4k views

Are there any dangers associated with rigid foam insulation?

Is there any danger of bad fumes/gasses being released from polyisocyanurate or polystyrene rigid foam insulation? I'm planning on insulating my bedroom from the inside (ie: putting the insulation ...
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0answers
119 views

Can i replace the insulation in my stove/oven with any kind?

I need to replace the insulation in our oven/stove. Do i have to buy specific insulation?
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223 views

How to insulate my garage walls using sheathing

My garage is a pole building type with pressed wood walls and exterior siding. I want to put sheathing on the walls for some insulation. The girts that the exterior wall is attached to are 1.5" x 4" ...
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1answer
1k views

How can I reduce heat transfer around my window unit air conditioners?

I have three old window units in my house and they function as my A/C. I am concerned about the amount of heat seeping into the house and cool air leaking out around the A/C units themselves. They're ...
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2answers
486 views

Why is the upstairs a lot hotter in a 2 story duplex?

I've lived in my current duplex for about 5 years now and every summer, my upstairs portion of the duplex gets noticeably hotter than downstairs. I couldn't give an exact measurement but 10 degrees ...
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0answers
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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5answers
3k views

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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1answer
199 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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2answers
732 views

Should I insulate my roof on the inside or outside?

I am renovating my house and am completely redoing my flat roof: ceilings, insulation and roof covering (I am planning to use EPDM rubber). In case it is relevant, I am living in the Netherlands. My ...
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3answers
623 views

How to choose floor insulation?

My question is about insulating the ground floor. I have a crawlspace under the floor which is vented and therefore quite cold (average temp in the winter is 4 °C and in the summer 13 °C plus ...
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2answers
695 views

Should I have cavity wall insulation installed?

I have the option to get cavity wall insulation done for free in my home, but i'm not sure if its a good idea or not. I've heard people say it can cause issues with damp, its hard to get out if ...
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1answer
1k views

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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1answer
2k 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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2answers
154 views

How can I get the maximum light while avoiding heat from a window?

I have a west facing window. How can I get max light while avoid any heat coming from it?
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1answer
489 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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0answers
429 views

How can I insulate brick exterior walls in a 100 year old house with wood beams in brick pocket floor supports

My sister has a 100 year old or older home over a wet and damp crawl space on an island which has high tide and rain water flooding of streets an crawl spaces. A sump pump runs all the time. The home ...
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1answer
449 views

Should I insulate the exterior foundation wall above grade or insulate the interior basement wall?

An existing basement wall is not insulated on either side. Humidity inside is causing significant sweating on the cold wall in the winter months. Outside, the top 4 feet of wall are exposed above the ...
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1answer
889 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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2answers
613 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
246 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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1answer
875 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
317 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
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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3answers
931 views

How can I add insulation to my roof?

I have an old 1930's house, the upstairs of which is in the pitched roof space. I've just checked and it has no insulation what-so-ever up there, so it is very much the same temperature as a loft at ...
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1answer
166 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
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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1answer
364 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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2answers
790 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 ...