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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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29 views

where to run pex in cabin

pressure tank in unheated cabin Best way to keep a PEX run in an attic (above a foyer) from freezing? I have the full well and pressure tank system finally working :) Need a run from the wiring ...
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54 views

How to insulate garage walls from the outside?

I have a partially finished double garage that has no insulation in the exterior walls. Half the garage (10'x20') is finished and is now my office, and half (also 10'x20') is now a workshop. The ...
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70 views

Can I install insulation behind a shower stall that is already in place?

I am in the process of renovating my kitchen. I removed everything down to the studs. One of my bathrooms backs up to my kitchen. Once I opened up the wall behind my bathroom shower stall (a ...
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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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77 views

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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77 views

How to fix an ineffective Extraction Fan setup in bathroom

I have an existing IXL (Heat, light and Fan) setup in a small bathroom (12.14 meters cubed). The air exchange rating of the fan meets the spec required for the room, it works and doesn't look that ...
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70 views

Would insulating a door between my closet and attic help keep the closet warmer?

In our new home, in the back of our closet the previous home owner had put that flimsy thin wood paneling as a wall in between the back of the closet and where the triangular part of the roof is about ...
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54 views

Should I install radiant-barrier insulation in a walk-up attic roof in Pennsylvania?

I have a walk-up unfinished attic in an old ranch house in Pennsylvania, where we see summer temperatures over 100F and winter temperatures well below freezing. Because there is planking over the ...
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111 views

Favorite adhesive for gluing foil faced poly-iso against concrete?

In the basement, gluing FOIL FACED Poly Iso to the foundation walls (Poured concrete). I was planning for XPS and was going to use proper foamboard adhesive. However, I am now going to be installing ...
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63 views

1902 house. Really cold winters. Insulation question

Ive got a 1902 house in montreal where it gets down to -30C during winter. Usually its about -15C. Its also very humid here. I just bought this place and noticed there is no insulation in the walls ...
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78 views

The new AC doesn't cool the house down like old unit, what can be the problem?

I had to replace my old HVAC because it was old and had a freon leak. The new unit doesn't cool down the house like the old system. The ac runs all day and it takes hours to get down to 72 degrees and ...
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165 views

How can I keep my computers cool in a 100 degree house?

I live in a tiny house of sorts and my AC doesn't run while I'm not there. I have two desktop servers that I use for my work which are currently stored elsewhere, but I'd really like to move them to ...
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34 views

Is there an industry standard for insulating a home during a remodel?

I just went through a horrendous remodel and moved into my home 4 days ago. I was surprised to learn that I can hear every noise between the first and second floors and inquired with my builder, only ...
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69 views

How to correctly add flooring to insulated attic

My attic is well-insulated with fiberglass insulation strips laid between the joists, silver thermal wrap stretched across the joists, and 18-20 inches of blown insulation on top. But as I ...
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1answer
56 views

Reducing noise from hardwood floors

We have a ranch (single-story) house with hardwood floors on most of the ground level. The basement below this level is finished, and is where I work out of at home. We have kids that like to run ...
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38 views

Cheap material for stiff, thick, lightweight, insulating walls?

I want to construct a large water tank. The walls need to be fairly thick (several centimetres) very stiff (they will be decoratively plastered inside and out and the plaster should not crack) ...
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417 views

Should I cut air space in my basement foam board insulation?

I intend to finish a part of my basement following this guideline from Fine Homebuilding and Building Science. In this configuration, the foam board completely contacts the concrete. My conern is that ...
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29 views

When finishing a basement, how do I transition from walls to doors/windows?

I am planning to finish my basement, which is currently naked poured concrete foundation throughout. I have a new door and new windows (only one shown in the Figure below because they are identical). ...
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204 views

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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27 views

How to insulate / finish a row house basement?

I am planning to insulate the basement of my row house. Given that I'm in Region 5, I will need proper insulation on the exterior-facing basement walls. But what about the walls facing the neighbors? ...
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R5 or R7.5 XPS before R11/R13 Fibgerglass for basement in Zone 5?

Insulating basement walls that are most below grade. Zone 5, and using a mix of rigid foam board and then framing 2x4 walls and insulating between the studs with R11 or R13 (whatever is on sale and ...
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47 views

Can I use free denim insulation that got wet outdoors?

I found some denim insulation on craigslist for free. It's really inviting to me as I'm on a tight budget and would really appreciate not having to buy my own insulation for near $500. I asked the ...
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35 views

Air conditioner

I removed two old wall air conditioners from our house. Unfortunately they do not make these wall units the small anymore and having a Hard time finding a small air conditioner? I was wondering does ...
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3answers
70 views

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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180 views

How do I deaden the sound of water dripping on metal?

I live in a two story apartment complex (upstairs neighbors are REAL nice). My bedroom has an AC Box/Swamp Cooler mounted into the wall. Directly above it is a similar unit for my neighbors. The ...
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66 views

Noise insulation of apartment right above noisy pub

How good can you isolate an apartment that's right above a very noisy rocker's pub? Could we install a thicker floor, or would the noise go through the walls anyway? What material would work best ...
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41 views

Insulate back of high and low voltage gang boxes in attic

We just finished building a home, and I prewired an equipment closet upstairs for handling all of my networking, home theater and whole home audio equipment. It looks like this: All the single and ...
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54 views

Is tape an effective way to hold on a foam elbow?

So, one of the things I want to do around these parts is insulate (lag) the hot water piping in this house's basement to the best of my ability (especially since part of it is in a crawlspace that's ...
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369 views

Which tape to seal seams between XPS panels?

I am planning to insulate my basement walls with XPS. I'll be gluing the panels to the wall and taping the seams. However, I'm finding conflicting information on which tape to use. The most common ...
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107 views

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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93 views

is this Asbestos? or anything dangerous?

In my garage there are some water pipes I believe that have a wrap around them and in some places its expanded and opened. Now I am worried if its asbestos. Its yellow and looks puffy. I near a water ...
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45 views

Do I need to replace attic insulation directly against new framing for a bath fan?

I have to temporarily remove insulation to install a new bath fan. The installation will require installing some 2X4 framing to hold the new fan in place. Is it enough to simply fold the insulation ...
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26 views

Blowed or batted over sprayfoam

I have 3 in of spray foam on ceiling ( not a hot roof ) and 2 in on the walls of my garage can I add batted insulation to the walls before I Sheetrock them or can I blow or put batted on top of my ...
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24 views

Is a combination of sheet EPS and closed cell foam between rafters feasible as a combination?

I am in Central Texas. It gets hot, anywhere from 14-45 days over 100 degrees Fahrenheit in this area. And, it gets cold. Last February 4th it actually snowed enough for me to cross country ski on ...
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2answers
44 views

Basement moisture on foundation issues

After taking all sheet-rock down I noticed that all walls (cement block) siting under ground are moist. Some of them even ate through footers. After farther look at the house I found out that their is ...
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3answers
3k views

What happens to foam insulation board after you pour concrete slab?

I plan on making a garage out of a large carport, and I've watched and I understood how to properly insulate a new concrete slab. 4 inches of gravel, vapor barrier, 2 inch foam board, 2 inches of sand ...
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51 views

Covering exposed insulation paper face

Other than gypsum, what else can be put over exposed insulation? Code wont allow for exposed paper. If not tyvek than what specific product can be used? The company that installed my insulation, which ...
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2answers
567 views

Any reason not to use Tyvek to cover exposed insulation?

I have exposed insulation in my garage and the water heater room that is fiberglass and I don't want my kids touching the stuff and playing with it. I am planning on covering it with Tyvek. Is there ...
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49 views

Condo Sound Insulation, Warranty

Similar to this, but not a duplicate: How can I determine the STC (Sound Transmission Class) rating for my condo walls and ceiling? The goal: Verify if I have a claim towards the developer who says ...
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67 views

Want to update insulation in knee walls. Pictures of the inside. I think it might be worth taking the old out and redoing it all, thoughts?

I purchased a house in the Metro Detroit area. 1943 built. Cape cod bungalow, pretty sure. Last winter, I had pretty bad ice dams and would like to re-insulate the knee walls before it gets too cold. ...
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1k 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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986 views

What does water leak through my chimney and wood stove pipe?

I bought a house n July 2017. The previous owners converted their fireplace into a wood stove years ago, a Garrison Stove in 1987 to be exact. My home inspector did not inspect the wood stove, but ...
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3k views

What is the R-Value of plastic over a window?

So we're about to have a cold snap (20 degrees, cold for us here in Central Texas). I have old windows on the house in need of replacement, but for now, I did a hack for the next week/month: I placed ...
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1answer
76 views

Sealing behind brick veneer

We've just removed the Gyprock (drywall) from our walls to install acoustic/thermal insulation and new acoustic plaster. In doing so, we've found that our 1969 home has nothing at all against the ...
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2answers
2k 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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8answers
75k views

Are curtains effective for keeping the room warm?

I live in a rented apartment and I am trying to find solutions to keep the heat in. The apartment has several big windows (the 'living room' has one wall that is 80% windows) and I have to run the ...
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157 views

Why don't conduit fill rules apply to cables encased in closed-cell foam?

I have a question that is more theoretical in nature. I know that when you have 14/2 cable and put it in a 1/2 conduit you are above fill (or just at max fill). The NEC cites that this is in part due ...
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A more thermally efficient house - can I block up vents in my brickwork?

I live in the UK in a typical '1930's semi' house. It is built with two layers of good old bricks and a cavity wall inbetween them. In my hallway, there is currently no carpet or hardwood flooring - ...
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4answers
775 views

How should I air-seal this gap by the floor along an exterior wall?

There's a gap between some of my floorboards and the baseboard: The gap isn't just cosmetic. I used a wooden skewer to probe the hole and was able to insert it around 6 inches in: This is an ...
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3answers
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Running romex in 20" attic space using pipe hangers

My drywall ceiling is attached to 2x6 joists 16" OC. Then, a 10" air gap above these joists are the 2x6 rafters 32" OC, for my flat roof just above. Even though the home is 1955, I have knob & ...