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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79 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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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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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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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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63 views

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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1answer
33 views

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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35 views

How can i insulate exterior brick walls

How can I insulate a house that is brick outside with nothing between the brick and the inside wall without enough space to put insulation between the two walls.
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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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Condensation on air con causing leak, best way to insulate

In the roof there is a large metallic air con box, the drip is coming from one of the corners, see photos. An engineer has said we need an external drip tray, and/or additional insulation. WHats the ...
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182 views

EPS insulation inside exterior walls

I have access to a large amount of EPS in the form of used multi-cubic-foot blocks (I believe they used to be boat dock floats). Because of the high R value of EPS, I am thinking about slicing them ...
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326 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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Adding fiberglass batts on top of cellulose; should I remove some cellulose?

I am adding unfaced fiberglass batts atop existing cellulose insulation in my attic. Currently, the cellulose is about 7 inches thick between/atop my 2x6 joists. I am wondering if it is worth ...
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How to deal with the mess when working with Tuff-R

Recently we bought a piece of Tuff-R -- I guess you would call it a styrofoam insulation board -- and cut it to fit a small window exactly. It is a temporary measure, to get through the winter. The ...
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132 views

How to build sunken shed foundation with insulation

I'm planning to build a garden office shed about 2.5m wide by 3m long. Regulations in the UK mean I cannot exceed 2.5m high since it will be close to the boundary of my property. The picture below ...
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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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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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79 views

Is it safe to stuff some insulation above my electric stove?

I have a coil-style electric stove with a "hood" above it. The hood has a nice light fixture built in. It also has an exhaust fan which I frankly never use. The problem is that there is a gap where ...
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198 views

Can I install a service panel on an exterior wall?

Is it within code to mount the breaker box on an exterior wall (not exterior but on a cold wall within the apartment)? The building inspector says insulation needs to put behind the box but there is ...
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78 views

Can I replace 4" fiberglass batts with thicker ones in my attic?

We live in an early 1970s ranch style house. Single story. Attic formed by 2x4 trusses on 24 inch centers. The insulation is R13 batt laid on top of the ceiling drywall but this has been removed in ...
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Can I sweep blown insulation to one side and replace with fiberglass batts?

I noticed my attic blown in insulation is rather thin on one side. Rather than buying enough to cover the whole area, I was thinking of just pushing or brooming the blown in insulation toward the ...
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2answers
71 views

What steps should I take to prepare for using a thermal camera?

I plan on renting a thermal camera to detect heat loss (e.g., missing insulation, leaks in HVAC) and water damage. Outside temperatures are getting down to freezing at night but are mid-40s during the ...
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119 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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1answer
95 views

Big box Pella vs. Pella Pella

The Pella salesman claims that his replacement windows are better than the Pella replacement windows that are sold at the big box stores. Is that true? I've done my best to ask the windows people at ...
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47 views

Best way to add low voltage outlet to wall that has blown in insulation on the other side?

I want to add a wireless AP and plop it on top of the cabinets in my kitchen; thing is the wall I want to add the low voltage outlet to had blown in insulation on the other side. (The ceiling is ...
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Need guidance in selecting a storm door

In relation to my previous question, Does a storm door help prevent heat loss?, where I learned that a storm door helps prevent energy loss, because of the air pocket between the two doors, now I am ...
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How effective are outdoor foam faucet covers to prevent freezing?

Everyone seems to suggest using those styrofoam faucet covers to help prevent the pipes associated with the fixture from freezing. They're cheap so I have them anyway (plus I'm not in a hard freeze ...
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3answers
98 views

Insulating basement rim joist cavities

I'm trying to figure out the best way to insulate the ceiling corners in my basement. The wood is flat against the foundation of my house, and I can feel cold air coming off of it. There are joists ...
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3answers
91 views

Windows the big heat loss?

I am planning an addition and trying to compute the insulation design, and it seems like windows are where all the heat is lost. For example, thermal triple paned glass only has an R-value of about 2....
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7answers
9k views

Air sealing a whole house fan

I have a whole house fan installed in my house from the previous owners. I love the fan, as it lets me cool down the house quickly in the evening -- or after I fill the house with smoke from ...
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1answer
53 views

Condensation on Skylight

So this is my first winter in my new house and I noticed the skylight on the second floor has a lot of condensation on the inside now that the weather is getting colder. It's an old single pane and ...
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1answer
245 views

Insulating under a bay window

I have a 1929 craftsman house. The dining room has a bay window, original to the house, cantilevered outside the foundation. The floor joists were covered outside on the bottom with tongue & ...
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21 views

Should I fill the void created by a magnetic strip used to insulate the door on the outside?

I installed this manetic strip for my mother in law, her door is in pretty bad shape but this works fine. She says there is sometimes water condensation on the metal part of it, do I need to do ...
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72 views

Is insulating the back of a PTAC unit for winter a good idea?

The winter heat in my apartment is supplied by old PTAC (Packaged Terminal Air Conditioner) units, using resistance heat (it's too cold for the heat pump to work). A lot of cold outside air leaks ...
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45 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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424 views

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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89 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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2answers
201 views

Gray “Dust” On Pink Insulation in Attic

I was looking in my attic today for the first time; it's been on my list to check up there to make sure nothing looks off (i.e. no water damage, the roof isn't falling apart, etc). One thing I ...
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1answer
104 views

Will insulating my attic make a noticeable difference?

I'm renting a house that was never originally intended to be occupied full-time. The house is of a cinder block type construction with no insulation in or on the blocks. The attic has some insulation, ...
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193 views

How are Clopay Intellicore garage door R-values so high?

Clopay's garage doors with their proprietary "Intellicore" polyurethane foam insulation claim R-values as high as 20.4 in a 2" thick door, or R-10.2 per inch. State-of-the-art spray polyurethane ...
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300 views

What to do about gap in bottom of plasterboard wall when fitting floating floor (UK)

I have removed the skirting boards in my new build house, as I am going to fit engineered wood floor via the floating method. The issue I have is that after removing the skirting, I was presented ...
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8k views

What type of insulation should I use if my in-wall oven is heating the surrounding cabinets?

We have an in-wall oven that is not properly insulated. It heats up the surrounding cabinet. The oven itself has internal insulation in good condition, but it is not strong enough to keep heat ...
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173 views

Can I bury insulated flex duct in blown insulation in the attic?

I've heard mixed information on this. I am replacing all my old ducting with new r6 flex duct. Continuous runs with no leaks. Some recommend suspending it above the blown cellulose insulation, but I'...
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468 views

How can I fasten pink polystyrene wall insulation into a structure?

I got a big polystyrene board from Home Depot (you know, the kind with Pink Panther on it). I want to glue it together with Liquid Nails to make a house for feral cats in my neighborhood. However, ...
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33 views

Advice on building a livable cabin floor on a concrete slab [duplicate]

I'm planning to build a 10 x 12 livable cabin based on a shed design. The cabin will rest on an existing concrete slab. Many shed designs recommend building the floor with equally spaced joists. ...
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70 views

Can XPS foam support the weight of a bath?

For a design project, we're looking to use XPS foam boards that are 5cm thick (15 cm wide strips) to support the underside of a bath without legs or wall fixtures, but a supportive frame at each end. ...
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33 views

Long clout nails though rigid insulation boards

We are building a cabin with a solid wooden roof (18mm) on which shingles are nailed. An advised method of insulation is to put rigid insulation board on top, then nail the shingles using long clout ...
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102 views

Inaccessible outdoor PEX piping lost its insulation - what to do?

We have an outdoor counter and sink, and a family of squirrels decided that it was a good place to live. Unfortunately they ripped off a good portion of the PEX piping insulation. (Pretty sure it's ...
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98 views

Insulating an attic ceiling

I am planning to insulate my walk-in attic to turn it into a storage room(closet for the wife), but I am having some issue understanding the process. The ceiling of this attic is at 45 degree. It has ...
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2answers
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How do I fix air leak in windows?

Our windows in the back of our house receive a lot of wind. When it's windy or very cold, the air is coming in through various crevices: window track and space between window. The windows are about ...

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