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Questions tagged [insulation]

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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Can I add insulation to exterior home walls without redoing all the drywall?

I recently bought a house and Ive found out the insulation is not good enough in the exterior walls. Is there a way that I can just cut a small hole and maybe blow in insulation into the walls ...
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Root cellar insulation

Building a root cellar in corner of full basement. No water issues. Humidity is relatively low in winter (SW Montana). Details: The root cellar will be located inside a full basement . The basement ...
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How do I insulate between bottom/top apartments?

My house is a two-apartment house, where I live on the first floor and rent the second. It's an early 1900s plaster & lathe, and currently has no insulation. I want to add rockwool in the ceiling ...
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Fiber glass In Attic. need knowledge [duplicate]

I have been seeing some dust of Fiberglass(?) floating in the air. Is breathing it, in unhealthy? I was unaware of the equipment in the attic, which I discover all the wrong wiring connections from ...
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Brick wall insulation

I moved into a 30 year old house this fall. The bedroom at the front of the house is colder then the others. Two sides of the room are brick exterior walls vs siding. I was in the attic running ...
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Does dark exterior paint hold and transfer more heat to an uninsulated house?

We are picking exterior paint colors for our stucco house. The interior walls are plaster and there isn’t insulation in the walls. I want to stay away from dark colors because I think it will make ...
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Should I add a vapor barrier in this situation?

I'm finishing my basement. I am wondering about the north wall which is a 2x6 stud wall (walkout basement). I removed the fiberglass insulation an put 2 layers of 3/4" rigid insulation (sealed edges ...
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Ok to add cellulose over blown fiberglass insulation?

I have an attic with blown in fiberglass insulation, probably original and 27 years old. The attic appears to have had some moisture issues in the past (bathroom vents being vented out of the soffit ...
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Are you supposed to put a vapor barrier on both sides of the common garage wall (wall between garage and house)?

In my garage, the wall between the house and the garage has visible studs and insulation in it. This insulation is 50+ years old and I am going to tear it out and put in new insulation. My question ...
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What is the recommended method of insulating PEX piping?

During the winter chill here in DC, one of my pex pipes that is not insulated and basically exposed to the elements cracked. I blame the contractors who didn't insulate and finish the job, literally ...
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Redoing insulation in the basement of the home I recently purchased

I recently purchased a home and have begun to do renovations on the basement. I am starting to look at insulation and so I have been researching what the best way would be to do that. The problem I am ...
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How should I insulate my partially finished, currently uninsulated basement?

I am in Alabama, climate zone 3. Half of my basement is finished, well at least it has a dropped ceiling, wood panel walls, an air supply and return, but no insulation. There is an uninsulated ...
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Is insulating basement ceiling or first-floor walls more effective?

In an old house with plaster walls there is a large room on the first floor with wood floor. The walls are not insulated. The basement has no ceiling, so you just directly see the subfloor of the ...
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Should loft insulation cover wall cavities?

When insulating a loft at ceiling level with mineral wool type material, should the insulation cover the exposed wall cavities for external walls?
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Insulation in the basement underneath of my fireplace

I have a gas fireplace that bumps out from the side of the house. It is always been drafty and super cold in the winter, today I went down and pulled down the one piece of batt insulation that was ...
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Insulation basement (Rigid Foam). What to do in the unfinished area

I'm planning to finish my basement. Most of it will be finished but there will be some areas that are unfinished for storage. I'm planning to use rigid foam insulation and seal it up. What should I ...
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Fireblocking a balloon framed house lead to rot in the walls?

Conditions: Balloon framed construction, house built in 1930, Southern Connecticut region Does installing a fire-stop or Fireblocking where the sill plate and rim joist meet, block airflow and ...
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Do you run a conduit under or over concrete wrap in the basement?

My basement concrete wall is covered with a concrete wrap and is anchored to the wall. The walls are unfinished. If you want to add an outlet down the wall to a workbench, do you run the conduit ...
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Ceiling insulation question

I live in a 2 story city row house in Philadelphia that is over 100 years old with a flat roof. The space between the second floor ceiling and roof grades down from the front to back - 36 inches or ...
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Is the gray insulance material asbestos? [closed]

This is a furnace room. Is the gray insulation material (on the wall and above the pipes) asbestos?
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Insulating conservatory skylights

How can I insulate skylights? My house has been extended and the extension has double glazed windows for roof, think of it as a very sturdy conservatory. I understand why the previous owners did it - ...
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Can I use alternative materials to insulate my roof?

We bought a mobile home to use for my office/studio workshop. It's 24 by 60, gutted out with no inside walls, and live in a desert area. The roof leaked and the insulation got wet and ruined. We ...
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Cut XPS and Spray Can Foam or Spray Foam Kit for Rim Joists?

I am looking into two methods of insulating my rim joist space in the basement on a house in Zone 5. I realize that spray foam kits are the cat's meow in air sealing and possibly ease of use - but ...
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Vapor barrier/retarder requirements in San Jose, CA?

I am living in this old house that has attic insulation on one half of the house. I plan to insulate the remaining half of the house to get it warmer during the few winter months. We don't have Air ...
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Air sealing advice between garage and conditioned space

I'm trying to air seal my conditioned, but unfinished laundry room which backs to the unconditioned garage. Unfortunately, there are several large spaces (one for the cold air return and another for ...
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Drilling into cinder block foundation

My house has a block foundation and water issues, I have a company coming soon to install a perimeter drainage system w/ sump pump and he said he's going to install a mill sheet vapor barrier about 4" ...
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Should I put insulation in a shower wall if it's NOT an exterior wall?

I know that I should put insulation in a shower wall if it's an exterior wall, but what about if it's just an interior wall? Is there still a benefit to doing this?
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Insulating a Detached Garage Ceiling

Currently the detached garage walls are insulated with batts of insulation, however the ceiling is not, so here in Illinois, the garage is pretty much unusable most days in the winter. I use this ...
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Soundproofing garden

New houses have been built at the back of my house and they are very noisy. I want to build an outside wall to get some sort of protection. I currently have a standard fence panel and a Hawthorn ...
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Can improved window insulation prevent condensation on the interior of a window

We have a whole house humidifier which is great but one of our windows condenses much more than the others and doesn't dry out because it doesn't get much sun during the day like our other windows. I ...
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Partial insulation of suspended timber floor possible?

We live in a Victorian terraced house and will be putting tiling down in the hallway. I’d like to know whether at the same time we should also do something to improve the insulation of the floor. ...
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Best sound-proofing techniques and recommended sound-absorbing materials?

This is fundamentaly a question about soundproofing and sound absorbtion. When working this project I've realised I don't understand the concepts as much as I though I did. I basically set up a shelf ...
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Can tile or click-lock wood be installed directly on rigid insulation foam

We would like to insulate a concrete condo floor and for height purposes (already low ceilings as well as not modifying fire doors) we cannot add much material to the concrete pad. Typically in this ...
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Why is the interior wall cold to touch during the winter?

When it gets cold out, about - 10°C, the interior walls are cold to the touch. Especially ones in the corners of the house. What causes this? How can it be fixed?
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Low voltage cabling - insulation

I have a closet that is colder than it should be - it is 2 degrees colder than the bedroom it's connected to. The closet is 4'x4', and has two exterior walls. The bedroom is 10'x10', with one ...
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Will a window insulation kit help with heat loss in the winter?

I have shutters over my windows, but I can never have them open in the winter because, when I do, my room gets very cold. I do not believe that my windows are drafty as I cannot see light around the ...
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Risk of insulation triggering mold growth?

The unfinished basement gets water which is pumped out with a sump pump. (Water from heavy rains percolates into the basement.) Company A gave me an estimate to insulate the attic. So did Company B, ...
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Insulation challenge - exposed wood beams with 6" tongue/groove slats on top form ceiling with attic above

1950s Los Angeles ranch style house with 32F lows in winter and 95-115F highs in summer. Ceiling above family room has exposed 6x6 wood beams with 1x6 pine tongue and groove slats resting on top. ...
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My basement wall is adjacent to a filled foundation. Is there any point in insulating?

I was planning on putting foam board insulation on my basement walls before finishing. Then I realized that on the other side of the wall isn’t earth, but a poured foundation for my covered porch. ...
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Restoring steel casement windows

I’m dealing with some 1930’s era steel casement windows, Tudor revival style, that are in reasonably good shape for the most part. They need some maintenance and would like some suggestions for how ...
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What kind of glass should I use for insulating a garage door window? [closed]

While insulating my garage door, I'm considering replacing the existing plain glass with something better. I'm considering replacing each pane, or simply attaching a second layer on the inside of the ...
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What's the best way to insulate an attic with 2x4 joists?

My 1938 home currently has zero insulation (aside from a few fiberglass batts haphazardly tossed about). The ceiling joists are 2x4 (spaced 16 inch OC), rather than the more modern standard of 2x6 or ...
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Insulating shower stud corner

I have a corner in a shower location that butts up against one exterior wall of the house, and as you can see there it is enclosed yet there is no insulation in there. What is the best way to insulate ...
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If it is not going to actively heated or cooled, is there any value in insulating a garage?

In Southern California, during new construction with a finished garage, the cost of adding insulation at this point should be low. But if the space will not have any active cooling or heating ...
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Dumb insulation question

I need to install an attic floor in my workshop - currently the rafters are exposed. I plan to use 3/4 plywood, then run faced insulation, then install a ceiling at a later date as time permits. As ...
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Can I flatten nails from house siding?

I'm doing some work on the inside of an exterior wall. It's covered in nails from the siding on the outside. I know you're not supposed to flatten these kinds of nails when used in roofing. Is it ...
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Vapor barrier behind electrical panel?

My electrical panel is mounted on bare studs of an exterior wall in my attached garage (living space above). The garage is not insulated and it does not need to be (except for the ceiling which will ...
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1answer
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Insulating inside on an exterior brick wall

I have a city house that is over 100 years old and the bedroom has two exterior walls made of brick. Inside the walls are plastered over. Normally, I would just add 2” framing and use polyiso foam. ...
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Insulation and roof venting

I am in the process of finishing my bonus room (attic space above the garage). There are soffit vents and a ridge vent. If I put insulation in between the rafters before I drywall the ceiling, will ...
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Which is the better first step: rebuilding a basement closet, or insulating the basement walls?

Recently closed on a split-level. The majority of it is well done, but neither my wife or I were content with the basement. It was partially finished, with a closed off utility room, some hideous ...