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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2answers
72 views

Is insulating suspended floor void with spray foam effective in reducing noise?

I am having my cinder block party wall insulated with stick-on panels. The property is a two story terraced house, and it has been recommended to insulate the void from floorboard to ceiling between ...
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Building an exterior wall within an exterior wall for insulation

I just purchased a 1925 beautiful home that is stucco on the outside and old plaster on the inside. I have some carpentry experience and am realizing the incredible loss f heat to the exterior walls. ...
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270 views

Basement insulation in front of vapor barrier

I am getting ready to finish my basement. We have lived in the house for 7 years, never any moisture or water issues in the basement. It currently has pink insulation from ceiling to 12" above floor ...
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217 views

Replace insulation in a Trane HVAC? (TWE030C140B0)

I found a little mold on the foil covering the insulation in my TWE030C140B0 air handler/ AC/Heater. I am 95% sure I have the moisture problem resolved and now I need to replace the insulation. Does ...
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67 views

Should I use reflective insulation over other kinds of attic insulation?

I just moved into a house made in 1969, it gets really hot during the sunny days and cold during the winter. I'm living close to the rocky mountains just so you have an idea how cold and hot it gets. ...
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630 views

Plywood over rigid foam over concrete: will I have moisture issues?

Short version: If I install 3" of rigid foam over a poured concrete foundation wall that has been sealed with Xypex, will I have any moisture issues if I install plywood directly over the rigid? ...
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2answers
1k views

How can install rafter baffle venting without removing drywall?

I have a finished attic, that needs to be updated. The pitched sides of the roof are sheetrocked & insulated, the ceiling is a suspended ceiling (will be sheetrocked) and the low knee walls are ...
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7answers
169k views

was in attic for an hour without mask. could this cause issue?

my bathroom fan was dropping water so i went up to the attic and applied fiberglass insulation to the bare metal vent pipt from the fan out to the roof. i was up in the attic for an hour wearing ...
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24 views

How important is the weather stripping on the inside of a Velux skylight?

I just had the inside of the wooden frames around my Velux skylights painted. The painter did a good job, but I think when he was removing the masking tape from the skylight's frame, he pulled off a ...
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1answer
751 views

Insulating a 3 season room with no crawlspace access

I have a small room off of my kitchen that appears to have previously been a back porch with cement blocks as its foundation. I already re-insulated the walls and ceiling, but there's still obvious ...
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81 views

Insulating basement concrete walls - anything missing?

Live in Zone 5b, going to shoot for 2" of XPS DOW foam board. Planning on gluing it to the concrete wall with foam board glue and bracing it while it cures. It will run to either the top edge of ...
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63 views

Should I worry about this pipe insulation? (fiberglass vs asbestos)

I have found those pipes in my basement. I hope its fiberglass, but not sure if its asbestos, because it got placed in the 60's or 70's (in my country the use of asbestos got banned in 2005). These ...
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Foam insulation around edge of bath. What is its purpose?

While doing some bathroom renovation, I noted foam insulation around the edge of the recessed bath when examining underneath it. The foam would extrude in places above and below the edge of the bath ...
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58 views

Finishing garage for year-round woodworking workshop

In Toronto, ON and I'm finishing my attached double garage (20x20) in hopes of setting up a woodworking shop. It's not currently heated or cooled but I plan on using it year-round so heating is ...
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140 views

Storing comsumable dry goods in your car in the summer? [closed]

I live in South Florida where the summer sun has no mercy. I drive a new van and I've taken steps to keep the inside cooler during the day. I live in the van for weeks at a time and need to store ...
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1answer
37 views

Improve existing roof insulation from the inside

We have a pitched roof (1971 house, The Netherlands) which consists of (outside to inside): Tiles 2cm PUR insulation 2cm wood We asked a few companies for quotations to improve the insulation (...
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22 views

insulating a sauna

I bought an indoor cedar infrared sauna but have little space inside for it so have it on my covered deck. I do realize it should not be outside over the winter but it is difficult to move it on my ...
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460 views

Polystyrene or other foam instead of mineral wool in low pitch loft

Have a 1970's 3-bed detached house with quite a low pitch roof - thus making loft space and accessibility less than easy. We are UK based. We've got bare minimum insulation at present (seems to be ...
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79 views

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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Room easy to warm with heater. But difficult to cool with A/C. Is this not insulation related?

I live in an apt building in the 60's. I always notice that the room is always warmer than the outside in the winter time(even with no heating). This stays true in the summer time where it would be 65 ...
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4answers
3k views

Will adding a cool air return in the basement help with summer AC power usage?

Pretty much the title. I have a full basement. Part of it is unfinished and has the water heater, furnace, and washer / dryer. The other part (roughly 1/2 of the total space) is partially finished. It ...
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1answer
38 views

Attic Insulation Questions

We live in an early 1970s ranch style house. Single story. Attic formed by the 2x4 trusses on 24 inch centers. The insulation is R13 batt layed on top of the ceiling dry wall but this has been removed ...
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1answer
36 views

1x8 roof sheathing VS plywood/osb

My 1955 home has a flat roof with 1x8 sheathing. It's time to replace the roof, and I am considering replacing blown-in attic insulation with batts, at the same time. The attic is only 20" between ...
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35 views

Concrete slab insulation is in the way - cut it back for flooring?

I have a converted garage built on a concrete slab. The slab is insulated with styrofoam panels which extend into the room about three inches, so the flooring does not go all the way to the interior ...
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159 views

insulate knee wall with faced or unface

Looking for more info on the insulation process of a knee wall. I was thinking of insulating the diagonals of the roof line. not what I'm unsure of is, was is the correct type of insulation faced or ...
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79 views

attic floor insulation vs. attic roof insulation

My attic is finished; 3 rooms, wood floors, plaster ceilings. I've gotten conflicting advice: some say insulate the floor, others the roof. The attic will not be used as living space. There are no ...
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311 views

Old cellulose insulation holding heat during summer

We have a house in Seattle that is 60 years old with 6-8" of blown in cellulose insulation in the attic with an inch of rock wool under that. There is basic ventilation in the attic. The trouble we ...
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45 views

Fiberglass batts: how to cover the exposed paper?

I need to install fiberglass batts under my (raised) house. I have read that the paper should generally face the warm side, so it depends on where one lives. I live in South Louisiana, so I plan to ...
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104 views

Will 3.5" polyiso keep my electrical cables from melting?

I am converting a room into a sauna that will frequently be very hot (100+C). It has some wiring -- a few outlets and a light, from its previous use. The insulation for electrical cables is rated up ...
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447 views

Attach XPS to back of stud framing?

In the basement that I'm finishing I have an irregular, rough stone foundation wall, pretty dry. I'll use 1" XPS foam insulation, then drywall. Can I build the framing on the floor, attach the XPS to ...
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24 views

fiberglass: faced or not?

My house (in New Orleans, where it is hot and humid most of the year) is raised more than 5 feet off the ground and there is old fiberglass insulation installed between the beams under the house, ...
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2answers
1k views

How to make attic easier to traverse?

My attic is a maze of wires, air ducts and PVC water pipes. I went just one room over from the attic entrance and it took me a solid 30 minutes just to go there and back. Would it be unreasonable to ...
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65 views

Asbestos insulation?

I recently found this insulation up in my attic. Can anyone tell me if this could possibly contain asbestos?
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377 views

How would I install hydronic floor heat on top of a rigid foam insulated basement floor?

I intend to finish a part of my basement following this guideline from Fine Homebuilding and Building Science. There are two options I could come up with for installing hydronic radiant heat ...
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147 views

Garage remodel: can I leave garage door in and put an insulated wall in front?

doing a garage remodel and wondering how best to keep the garage door on facade and still be able to have A/C in the garage? I live in hot and humid south Texas. Is this a ridiculous solution to ...
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56 views

Shower head on exterior wall - Insulation R-30 Rock Wool

We are currently building our home in the Utah area that is within 30 min of Salt Lake City. Our homebuilder recently decided to place the shower head in our shower facing the door - needless to say ...
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1k views

How to seal the exposed top of glass block windows

My basement has some glass block windows, that seem to be improperly (or not-optimally) installed. See picture.... As I understand it, there should has been a perimeter channel attached to framing, ...
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2answers
6k 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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3answers
23k views

How to seal between sill plate and foundation wall with wide gap?

Here is a picture of the top of my uninsulated basement wall. The foundation is poured and from early 1970s. For orientation to the photo: the white in the lower left corner is the vertical face of ...
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1answer
946 views

Sealing a tilt type garage door

I've got a tilt type garage door with gaps on the side. I've sealed the top and bottom, but I'm not sure what to do with the sides. I've googled a bit and it turns out that it's recommended to just ...
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32 views

Insulation foam inside PVC sleeve for silcock

I just installed an outdoor silcock outside my basement. To avoid direct contact with the brick in the hole I drilled in a foot thick brick wall, I put a 1-1/4" PVC pipe and then the silcock inside it ...
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Is this cloth jacket surrounding my electrical asbestos?

Checked to see what was going on behind the electrical socket, and discovered this fibrous wire insulation. Also, I think who ever installed this 3 prong outlet in the first place did so illegally ...
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1answer
53 views

Running new electrical with drywall removed, but insulation installed

I had to pull a 4' high and long section of drywall out of my garage due to a ton of damage in various places. While that's off, I'm planning to lower the electrical boxes along that wall about 3 ...
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1answer
33 views

Can I install Insulation board in the interior wall with House wrap on the exterior

I am insulating a shed as a wine cooler. I have house wrap on the outside. I will install unfaced batt insulation between studs. Can I then install foam insulation board under the drywall? I am ...
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1answer
132 views

Can spray foam be used between Rim joist and exterior sheathing?

I have a 40 yr old single story modular home set on a block foundation. I used a thermal temperature gun to verify a temperature difference. the insulated wall is approximately 1 to 2 degrees cooler ...
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5answers
2k views

Box in knob and tube wiring between ceiling and cellulose?

I know that code says no cellulose insulation with knob and tube wiring because of possible heat build up. I also know that evidence of it causing fires because of this is scarce and a few states ...
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4answers
261 views

Should I install house wrap under board-and-batten siding on a heated shed?

I just bought a new home and I would like to board and batten a very ugly shed that is on the property. It's a large shed with a concrete floor that I plan to use as a work shop. It will have a wood ...
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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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53 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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2answers
69 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 ...