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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Fiberglass appearing in home dust

Thin and very straight fibers have been appearing in household dust, primarily in the room which I occupy. I suspect these fibers to be fiberglass. These fibers shine/glint back if illuminated with a ...
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Will plywood between foam board insulation be prone to moisture condensation?

I'm currently doing a full house renovation, taking off all the internal drywall and moving a few walls to reshape the layout with a new kitchen and bathroom. I'd also like to update the insulation ...
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Is an aluminium radiant barrier allowed to cover insulation paper facing instead of drywall?

First some context: Geographical location: City of Sacramento, CA, USA Building: Residential detached garage. Goal: To keep it cool in the summer and warm in the winter. Approach: kraft paper faced ...
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Best way to insulate knee wall

I have knee walls that have the insulation that is falling down. As you can see in the images below, There is very little access behind the knee wall as there is duct work and cross braces in place ...
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Is it safe to be in insulated attic

Is it safe for me to be in an attic with this type of insulation without a mask? I have found myself coughing whilst laying floor boards and I’m not sure whether that is general dust or something to ...
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What kind of window/glass is this?

I'm wondering what kind of glass this window is made of. Is this a "strong" window like laminate? Finally, is it safe to apply a film such as tint or "security film"?
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Insulation R value vs. foil facing

Insulation R value only relates to conducted heat. Foil-facing reflects heat, so it reduces heat transfer between inside and outside via another mechanism (stops radiant heat from becoming conductive ...
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Could R-11 Sound Batt have a large impact on reducing sound

QUESTION: will Owens Corning R-11 EcoTouch PINK Unfaced Fiberglass Sound Attenuation Insulation Batt help significantly with the sound transmission? I live in town homes, so they are 2 story units ...
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Dryer duct cleaning: brush picks up insulation

Our dryer is on the 2nd floor, above a garage. It vents into the wall and downward, and comes out about twelve feet above ground at an exterior wall several feet away to the right. I think the duct ...
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What to cover underside of shed subfloor

I'm building a garden office (shed) and will build a floor similar to that shown below (minus the flat beams between the joists and the concrete supports). I will insulate the floor using PIR (e.g. ...
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Will fiberglass insulation grow mold? (Florida)

Followup to this question one of the comments says that fiberglass can trap moisture and lead to mold/mildew. I did some research myself and found other sources saying the same. This worries me -- ...
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Has anyone used slow rise foam insulation?

Has anyone used slow rise foam insulation? Here is a link: https://sprayfoamkit.com/products/slow-rise-spray-foam/ My house isn’t insulated (older houses in Japan rarely are) and I’d prefer not to ...
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Will a door rubbing on the carpet cause excessive wear?

We recently had carpet installed in our master bedroom. We love it! My husband trimmed the door, it opens & closes well for me. The door is touching or rubbing the carpet when opening & ...
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Should I COMPRESS fiberglass OR use foam insulation?

I have a room made of hollowed concrete blocks that I framed by mounting 2x4s, wide side against the wall. This gives me a 1.5in depth cavity to fill with insulation. Should I use an r19 fiberglass ...
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Is it okay to put rigid sheet foam insulation directly over studs before installing sheetrock (fiberglass insulation would be in the walls)?

We want to improve the insulation in a bedroom. Will it cause a problem (condensation, etc) if we put rigid sheet foam insulation that completely covers all the studs before installing the sheetrock? ...
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Should I use rafter baffles between every rafter . I have 2 roof vents now on a 20'x22' roof with 2x8 trusses. I was planning on using R19

I have a 20'x22' vaulted roof 24 inch on center with 2 roof vents. I was planning on using 23"x 6" R19 single face insulation between the 2x8 rafters. Do I need to use rafter baffles between each ...
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Basement ceiling

I'm finishing my 50 year old basement and need advice regarding the 6'x4' ceiling area (which is actually a cement slab from the front porch). It drops down 2" lower than the rest of the ceiling. The ...
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Insulating under floor boards with foil insulation

I am looking to insulate underneath the floorboards in a ground floor suspended timber floor with no access from below. The joists are 4" (10cm) deep. I have some concerns regarding airflow under the ...
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Make a sliding barn door airtight?

I'm brainstorming for building a cabin this summer and am wondering if anyone has had luck making a sliding barn door airtight (or at least, pretty airtight). One cabin design I've been pondering is ...
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Heat shielding paper under radiator cover?

What am I looking at here with this paper-ish material on the underside of all my radiator covers? They are pretty old covers, but I don't believe they are as old as the house (1923). Is this... dare ...
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Should I install acoustic insulation in ceiling in basement with switchback staircase and no door?

I'm finishing my basement. Is it worth it to install basic insulation or sound barrier insulation like Rockwool since there won't be a door at the bottom of the staircase? Above the basement living ...
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How to insulate around an electrical panel?

I’m insulating and putting sheet rock on my garage walls. This is the outside wall and the back side of the electrical meter panel. The large wire bundle going out of it runs through my attic to my ...
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What is the insulation in this hot water jacket?

Taking apart an old water heater and found this jacket - ripped to shreds, probably by the cat. Is it likely this contains asbestos or is it fibreglass? Here is a video Thanks.
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Renovating bathroom, do I need to add a moisture barrier over insulation

I'm renovating my bathroom, and I have to rip out the entire bathtub and surround, so I decided to add insulation to both the external wall and the internal long edge of the bathtub surround - see ...
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Insulating Basement

Our unfinished basement has hollow cinderblock walls and I am wanting to insulate it and drywall the basement. Our house sits on a slope so the font of the house, including the basement, is ground ...
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Can I lay an attic floor over electrical wires?

I've been told that the electrical wires in the roof can heat up and potentially start fires if you cover them up. How can I get around this to lay the floor for an attic? The type of floor is just ...
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Stop pipe from banging without removing floorboards

We have a pipe that bangs for a while right when we turn the heating on. I managed to isolate where the pipe is (under the floorboards on one room), the problem is that I can't lift the floorboards ...
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Should insulation batts in my attic be lifted off the ceiling, leaving a gap?

I have what appears to be R-30 unfaced fiberglass insulation batts between my ceiling joists. The installation looks like I would expect, except that the batts appear to have been pulled away from ...
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How to knock a hole through wall in crawl space

I need to gett access to the crawl space under the floors in every room in my house so that I can fit underfloor insulation. I'd like to fit insulation board as it seems to be the easiest to work ...
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Outside Sauna Build Moisture control any suggestions?

I am currently building an Octagon sauna that will double as a mobile bug out shelter that will be mounted on a trailer. I'm putting the octagon on edge if you can imagine so that when viewed from ...
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White mold in the attic?

I've got an 1890s house in London. We started getting some penetrative damp through some of the upstairs walls so I've had a look in the attic to check if there's anything going on up there. It looks ...
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Insulating against brick in rim joist bay

I was hoping to air seal and insulate the rim joist in my basement. This is a balloon-framed house in zone 5, so the bays are open to the floor above. At some point brick and mortar were put in the ...
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Is it okay to insulate some but not all steam pipes coming from boiler?

I have a Slant/Fin boiler with un-insulated pipes in the basement. The previous owners of the house finished part of the basement and covered some of the pipes behind drywall in the ceiling. Is it ...
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Crawl Space Insulation in Montreal

I have the ground floor apartment in a 100 year old triplex on the plateau in Montreal. It's an 800 sq foot apartment with baseboard electric heaters and I'm currently using over 110kwH per day to ...
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Exterior Wall - Stacking Fiberglass insulation and Mineral Wool insulation

I am in the process of finishing my unfinished basement and had a question about stacking insulation. When framing the basement we realized we have alot of areas which have about 6~ inches of extra ...
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Doors to uninsulated walk-in spaces

I have two 32" doors in my house that lead to uninsulated storage rooms. I'm concerned about my utility bills, and I'm wondering if these doors are appropriately insulated. What kind of door should ...
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Is there a measuring method for determining of the real thermal conductivity of a building component?

We would like to determine which elements of building are to be renewed or changed. Among other things, we want know which elements are subject to a specific heat transfer. Does exist a measuring ...
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Could this be asbestos?

I'm gonna get the material tested - already bought the kit. But I'm wonder what people think - I thought it might be old mineral wool since I've seen stuff that looks similar to it. I'd read that ...
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Mid project finishing basement: should I rip out new framing?

I am learning that the wood framing that has just been installed (glued) in my basement really should have come after putting in continuous foam board insulation against the wall, separating the wood ...
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Adding new electrical outlet; ceiling insulation is sandwiched between drywall and plywood (attic)

I'm looking for a good technique to add an outlet to a wall that currently has no electrical. My initial thought until my discovery was to: 1) Identify the stud I want to anchor the outlet to 2) ...
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Another Question on How to Cover Up Exposed Insulation in A Basement Ceiling

I have read through many questions with a similar problem, but different circumstances than I have regarding this issue. The home is in Ohio so cold winters and hot summers built in 1997. I have a ...
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What to put down under new carpet or “luxury vinyl tile” to prevent cold floors?

We have a hardwood living-dining room floor that was improperly installed (before we arrived), and squeaks and creaks something awful. We plan to rip out the old flooring and put in LVT (luxury vinyl ...
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Gap where two different roof lines meet - best way to close up?

In my attic today I noted that where two different roof lines meet and overlap there is a large visible gap where light was coming in. It looks like they shingled the lower roof and then built the ...
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Fibreglass batt vs rigid foam insulation replacement in attic

Cleaning out attic in older 1954 rancher, original batt insulation badly damaged due to moisture (no leaks, but previous owners replaced roof in the winter) and rodents. Attic is vented via soffit ...
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How to fix chimney hole in roof?

I've starting insulating the roof and that got me looking at the "old" hole where a (useless) chimney used to be. That chimney got removed for a solar panel setup. As I'm insulating, this needs to be ...
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Does this loose insulation look like it might contain asbestos?

Was remodeling my bathroom, and after ripping open the ceiling a bunch of this loose insulation fell down out of my attic. Does this loose insulation from my attic look like it might contain asbestos?
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How to remove and reinstall wood panel walls?

I am looking at upgrading the insulation of a house from the 1950s that has vertical wood panel walls throughout. I think regular walls with drywall and paint are difficult to upgrade, as the walls ...
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Do I need to insulate my basement?

I am currently finishing my basement and wondering if I need to insulate my basement. I have already framed all the walls. I have a below grade basement and the temp is pretty consistent. Local code ...
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How to cover area under vanity with PEX exposed?

I just installed IKEA vanity and it requires re-run new PEX. Since behind the wall is concrete at corner wall, only way is to run PEX outside the 2x4 like picture below. But now it opens a hole like ...
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should concrete block wall be sealed on top?

I have a 2 story + basement townhome with 8" concrete blocks walls between my neighbors. At the top of each shared wall is a sheet metal cap. Some of the cavities have concrete in them but many are ...

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