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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30 views

Type of insulation for flexible aluminum duct?

I’m replacing an undersized bathroom exhaust fan with a larger one that has a higher CFM. When switching the fan out, I want to add insulation to the flexible aluminum duct that goes from the fan to ...
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How to insulate a crawl space without an access point

I have a cottage that has recently been completely renovated but later learnt that the floor was not insulated because there isn't an access panel. The cottage doesn't have a crawl space the area ...
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Will replacing windows significantly reduce solar heat gain in summer?

A friend of mine is remodeling his 1980s house and was asking advice about keeping it cooler in the summer. The house currently has the original double pane windows, many of which have "popped&...
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40 views

How can I cut slots in the ground to install insulation panels?

To build a geothermal greenhouse, I need to insulate a thermal mass -- basically the ground directly the greenhouse. The insulation will be for the underground "walls" only, no floor, and 5 ...
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107 views

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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148 views

Insulating a Wall Against Unconditioned Attic Space

I'm looking for help in insulating my 1950s San Diego house. A second story was added in the 70s and a gas furnace + A/C was added about 10 years ago in the unconditioned space above the downstairs ...
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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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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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48 views

Insulating and framing a basement after drain system and plastic vapor barrier installed

We had a moisture problem in our basement located in Minnesota. Recently some foundation water came up and ruined our carpet, when we tore out the drywall there was moisture build up and some mold on ...
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121 views

Air-sealing the eaves

I am trying to insulate and seal the eaves of a vented roof over a log house in order to protect the thermal insulation (flax batts in my case) from the outside air and liquid moisture (not vapor). ...
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89 views

Can insulation touch the roof sheathing in a sloped garage roof without soffit vents?

I am beginning to install fiberglass insulation in my garage and want know if I have done the ceiling wrong. The issue is that the insulation touches the roof sheathing in the sloped area below that I ...
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323 views

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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Foam covering around foundation--what is it and can it be removed?

I recently moved to a new house. Portions of the foundation have some foam-like panels on top of it, in between the ground and the start of the siding. It's worn down, with holes in some spots, and ...
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How can I insulate the inside of a fire escape door?

At our office, we have a server room located on the southeast-ish side of our building, exiting onto a parking lot/loading dock area (a completely paved area with zero shade). The door is an emergency ...
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Keep and patch, or replace white rigid foam during basement remodel?

I'm removing old wood paneling and drywall which is glued to (what appears to be regular Styrofoam) foam board, which is glued to a cinder block basement wall. The goal is to add more insulation (2x4 ...
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Insulating Cathedral Ceiling

I have a 1989 house with a cathedral ceiling built 2x10 rafters 24" oc. I am about to redo the roof, which would give me a chance to pull up the decking and improve the insulation. I am guessing the ...
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Is this an acceptable way to fix garage roof condensation?

I'm in the UK. My garage has a corrugated metal roof with no insulation. In the winter, when it rains the underside of the roof drips. Not massively, but just enough to be annoying. The roof ...
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31 views

Insulation inside AC unit has mold and falling apart

I noticed the exterior on my AC units has small black circles and I assume it is mold. A few days ago the drain was plugged and the condensation all backed up inside the unit. I had the drain fixed ...
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Options for Insulating around window with drywall recess

Hello wise and wonderful HI Community! I need some help. I bought a house last year and noticed horrible drafts coming from the tracks between the upper and lower window panes. I dug in today ...
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If I run CAT5/6 cables parallel to electrical cables, is it possible to shield the cables with copper tubes to stop interference? [duplicate]

I'm remodeling my home and I wanted to hardwire some extensions of my ethernet near my 220v outlet, by near at least a foot away from it. I was wondering, would I be able block the interference if I ...
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220 views

3 season room vent and insulation questions

I am building a unheated 3 season room in northern Wisconsin. I have insulated the floor with rigid foam blueboard. I plan on insulating the ceiling and walls as well. I have a 4/12 pitch gable roof ...
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30 views

Adding Extra Insulation to Rim Joist

I'm just beginning a basement finishing project, so I expect this is my first of many posts. Right now I'm wondering about whether it would be worthwhile to add insulation to my rim joists. I live in ...
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309 views

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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46 views

Is it normal for fiberglass to face down in basement?

Image attached below. Entire basement has the fiberglass pointed downward and the paper touching the ceiling above. Why wouldn’t it be the opposite way so the fiberglass isn’t just hanging down?
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Which side up on installation of Fesco Foam Insulation?

I’ve got a stack of Manville Fesco Foam insulation boards salvaged from a commercial installation that I’m repurposing for the inside of my garage roof. I’m planning on machining them to fit around ...
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28 views

Exterior air conditioning pipe insulation

I live in the Southern California desert and am doing some renovations to my house. Our AC line runs on the roof from the center of the house 25' to the west side and down the wall to where the ...
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62 views

Insulating basement that's already framed with electrical run

First, let me own my novice DIY status and say I screwed up. I bought a new house last year in the Indianapolis area and immediately went to work finishing the basement. The builder attached batts of ...
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154 views

Does plywood over rigid foam meet the fire barrier requirements?

I've seen a lot of discussion about using plywood instead of drywall over rigid foam insulation when finishing basement walls (here and here). As I look to insulate my basement, I have several reasons ...
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48 views

Is moving a desk upstairs/downstairs for comfort twice a year a sign of poor insulation?

In a side-split on three levels, four including the basement, the heating and cooling unit is almost new (2 years), and the heating/cooling unit was only available at 35% more cubic feet capacity than ...
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How do I design an ice house?

Where can I find how to design a cold room storage building? I have a 12x12 shed that I use as cold storage for tree seedlings for about a month each spring. The present construction is 2x4 walls ...
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160 views

Would mylar provide adequate insulation for an infrared sauna located outdoors?

I'm planning to purchase a portable indoor infrared sauna to be located outdoors under my deck. Although ambient temperatures in the SF Bay Area are fairly mild, I am concerned that it might take ...
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1answer
105 views

What’s this diagonal metal strapping between my studs?

So I’m trying to install a pet door and came across this between my studs. This is the second pet door I install and have never seen this. I’m in the dinning room and the wall is obviously an outside ...
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3k views

Is this asbestos insulation?

I was removing some panels in the garage of the house that I rent, and found one wall filled with insulation, at first I thought of mineral wool but as it all fell in crumbles I'm afraid it might be ...
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111 views

Worth going from R49 to R60 in attic?

We have about 3" of old insulation in our attic. We want to bring it up to R49 but I have read that some suggest taking it to R60 to get more energy efficiency. This may not be a question that can be ...
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Can I install cellulose insulation without a blower machine?

I've purchased a few bags of loose fill cellulose insulation from the local hardware store (GreenFiber brand). How will the insulation work if I don't put it through the machine to fluff it and force ...
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Will blown-in insulation work directly on the back of 12" square ceilings tiles?

We're renovating an extremely old house that we use as a camp that had numerous issues. ( Originally built circa WW2, but has had some work done since then. We use it occasionally in the warmer months ...
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Mini loft conversion help (UK)

I have a very small loft (4sqm) that is part of an extension that sits above a utility room between my home and garage. I would like to turn the loft space into a small server closet due to a lack of ...
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42 views

Basement (re)finishing insulation question

I started a job and my wife is looking to string me up if I don't start finishing it soon. We bought our 50 y/o rancher in PA with a "finished" basement, aka, drop ceiling, paneling on 3 walls (4th ...
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373 views

Insulating a cathedral roof with rigid foam

I am in the process of remodeling the 2nd floor of our cape and I am trying to figure our how to insulate it. Here is what the 2nd floor looks like, roughly. Here is another drawing that shows the ...
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68 views

Rigid board installed after framing in Interior Basement Walls - Should I be concerned about trapped moisture?

I am helping my brother-in-law finish his basement. I noticed the framing was done first then the insulation was added after. It looks like rigid foam board was pressed up against the concrete wall ...
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46 views

Will reflective aluminum on windows reduce solar heat transmission?

My room get overheated by the evening sun. I have some blinds but its not really helping. I was wondering if putting some reflective insulation would help. Not removing the blinds but between the ...
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236 views

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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Can rigid insulation be added to attic space over a plastic vapor barrier in a 100 yr old home

This is a century home and we are trying to restore as much as possible.The attic has a plastic vapor stapled to the rafters and some spots it jus hangs exposing the wood. would it be wise to staple ...
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36 views

Insulating/encapsulating crawlspace with HVAC ducting questions

In the PNW/Zone 4 climate. The house I am purchasing built in 1942 with an addition added had an inspection performed and it was noted that some of the fiberglass insulation installed under the ...
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83 views

Why not use tile instead of mineral wool for sound proofing?

I read that the heavier the material the better it blocks sound. Then why do people stuff their walls with soft insulation like mineral wool. Why not just put clay/ceramic tiles or wooden boards ...
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52 views

Which insulation technique should I use to insulate my subfloor?

I'm converting a carport into heated space and decided to install a subfloor to raise the room to the same level as the rest of the house. I have roughly 1"-3" of clearance below my floor joists, so ...
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4k views

How do I install a vapor barrier and insulation in an existing floor?

I have a large room in my house that is built over a crawl space. The floor of this room does not have any insulation installed in it. I live in upstate New York so it is my understanding that I ...
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53 views

Testing for insulation for asbestos?

Should we be worried about asbestos with this loose-fill insulation? New England house from the 1860s. No idea when the insulation was added but the attic space is extremely difficult to access.
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Are Steel SIPs Structural?

I am from the Caribbean and we have a lot of termites so OSB SIPs are not an option, my question is this, are steel SIPs Structural like OSB SIPs? SIP = Structural Insulated panels. EPS = Expanded ...
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Which is more preferred, PU SIP core panels or EPS SIP core panels?

I am looking at something that can last a long time, has good structural component and provide good insulation. Which would be the preferred option in this case? I am from the Caribbean. Thanks!

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