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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How can I vent my roof 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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2answers
23 views

How can I fill a gap beneath windows?

Outside my house, there is a gap visible below some of my windows. I have attached pictures to make it clear, since I don't know the terminology. The gap is about the width of my thumb. I can see the ...
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6answers
6k views

How do I remove blown in attic insulation?

I want to replace the drywall ceiling in my house. It's old and has been painted over a million times. Home was built in the 50s. How do I replace the ceiling without replacing the insulation? Or if I ...
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3answers
4k views

Why did insulation and vapor barrier cause mold in my storage shed?

I recently installed insulation in my garden shed and covered it with a plastic vapor barrier. This was done in the summer when the weather was warm and sometime humid. Shortly after I'd finished ...
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1answer
32 views

Can I use 1“ XPS and fiberglass batts instead of 2” XPS insulation in my basement?

I have read multiple sources on the internet suggesting use of 2" XPS foam boards to insulate basement foundation and then building a 2x4 wall in front of it. 2" foam board is very expensive when ...
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0answers
13 views

How best to add insulation under a rubber roof with an air gap?

I'm trying to find out if I can insulate my ceiling. Half the house has attic, half does not. Everywhere (from top down) I have rubber roof, 1" foam, wood planks, 2x8. Then, in the attic, that is ...
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0answers
39 views

What insulation should I use in my attached garage?

I'm currently tearing out the sheetrock and everything in my attached garage to do general repairs to other things. I quickly found that there wasn't a single bit of insulation (which explains a lot ...
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2answers
50 views

Gap between 6“ dia wall thimble & 6” hvac pipe

I bought a 6" dia aluminum wall thimble to vent my 6" dia hvac steel exhaust pipe through to the outside. However, the diameter of the 6" thimble is actually 6 3/4". How do I effectively insulate the ...
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1answer
143 views

Should I install insulation between the rim joist and the top of foam insulation?

I am in the beginning phases of finishing my basement, newer house with poured cement foundation and engineered I-beam floor joists. No moisture issues in the basement. Rim joist currently has a batt ...
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1answer
226 views

Why do basement walls need less insulation than crawlspace walls?

I used this DoE calculator: http://web.ornl.gov/sci/roofs+walls/insulation/ins_16.html For Washington, DC, it recommended R25 for crawlspace walls and R11 for basement walls. Why would they be ...
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37 views

How can I insulate a room without tearing down walls?

The kitchen in my Philadelphia rowhome seems to have been....a last minute idea. From last winter, I'm almost certain there is no insulation involved in the room. Is there a way for me to do something ...
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1answer
30 views

Insulating a thin-walled dormer

When I had my roof redone, we discovered that the nails they were using to put up the plywood base for the new roofing went through the sides of my dormers. Apparently those surfaces are a single ...
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0answers
16 views

basement wall insulation

just bought a house the basement is below grade and the walls are all most finished needing one more sheet of drywall all the way around. im worried about the way they finished the insulation they put ...
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1answer
70 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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4answers
3k views

How can I insulate my fireplace when it's not in use?

I have a wood burning fireplace insert, that is not currently being used. Now that it's cold in my area (27F), I've noticed that there is quite a draft coming from the fireplace. How can I ...
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2answers
114 views

How useful is double-glazed glass for sound and heat insulation in a semi-tropical climate?

I'm located in Bombay/Mumbai, and I've been trying to figure out what windows I should install for soundproofing and heat insulation. I was talking to someone who does consultation for uPVC windows. ...
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2answers
114 views

Can insulation batts run on top of wall studs?

Our house has vaulted ceilings, and the attic space contains three walls that are shared with living space (bedroom and living room). The attic sides of these walls have batts of insulation on them, ...
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31 views

Should I add an air return in my basement and seal old vents?

My question is basically a variation of two prior questions: "How do I close and seal an old external vent" and "Should I add an air return in a finished basement." My house has a bottom level that ...
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0answers
43 views

How should I seal and insulate a crawlspace to mitigate radon and allow for storage in the space?

Background: I recently bought a house built in 1996. It has a 1480sq ft (approx) living area, which is the same as the crawl space size. The location is in the Kansas City metro area. The yard is ...
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0answers
32 views

How do I attach windows to a block wall covered with rigid foam insulation?

I'm wrapping a block wall house with rigid foam insulation. I plan on liquid nailing it directly to the exterior block wall of the house. I plan on attaching furring strips with tapcons on top of the ...
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0answers
27 views

What are my options for my chimney? (Ventless fireplace, insulation)

When we moved into our house it had an original chimney (now about 40 years old) but the original owners had converted the once-wood-burning brick fireplace into a ventless gas insert. I immediately ...
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2answers
205 views

What type of insulation is needed for exterior walls on a brick house?

I have a government grant (2,440$) to insulate all of my exterior walls. The issue is, I cannot access them from the outside because I have a brick house. My first guess was that I will need to take ...
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2answers
142 views

Should I put vapor barrier only on exterior wall of a bathroom?

I've been searching around the site and haven't found an answer for my question on where to place a vapor barrier so I'm hoping to get a little more clarity here. Basically I'm in the home stretch of ...
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1answer
127 views

Can I block a skylight during summer without condensation?

I have a small fixed skylight and figure that during winter it's no problem to block the tunnel at ceiling level as suggested by an answer to a similar diy.stackechange question. (The only difference ...
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1answer
34 views

insulation below fireplace

I was removing wood paneling in the basement to fix some seepage cracks and I noticed a huge space that was un-insulated. This spot had some pipes running through it and it runs right underneath the ...
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2answers
95 views

How do I insulate a strip foundation from below?

While building a strip foundation (a concrete wall starting several feet below ground) I have to insulate it from moisture because otherwise moisture will get into the foundation and into the ...
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1answer
44 views

Insulating and reducing boominess of plywood subfloor

I have a plywood subfloor in a ground floor extension that is laid directly on the joists. The current floor is half solid wood tongue-and-groove laid on top of green fibre underlay and half fake ...
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3answers
43 views

How should I insulate the ceiling between floors in a ski cabin?

I have a small ski cabin in upstate New York (cold climate) that we only visit on weekends. It is heated by a wood stove. During winter we had many problems with bursting water pipes so they are now ...
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1answer
39 views

Insulated radiator foil

I'm concerned that the insulation/ cardboard foil that's behind my recessed radiator is asbestos. My house was built in 1960. Does anyone know if they made that stuff with asbestos? Before purchasing ...
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5answers
147 views

How can I insulate my basement on a budget?

I have a home built in 1925, a "Chicago Bungalow" style, in Louisville, KY. I have roughed in the basement, trying to take advantage of every square inch. I am planning on using it for short-term ...
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1answer
51 views

Adding ventilation and insulation with limited soffits

I’m hoping to add some insulation and ventilation to our attic. It’s a 1954 with a 1991 addition. The second floor is warmer in the summer, the original part much warmer than the addition. Current ...
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3answers
367 views

Can I add rolls of unfaced insulation to increase the R value of my attic insulation?

I live in a two story home that is approximately 150 years old. The attic floor is constructed with large beams and old wood planks laid across the complete surface area, rendering the attic useful ...
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4answers
2k views

How can I measure the r-value of a wall?

What is a reproducible test to measure the r-value of an exterior wall? Or even a specific spot on a specific wall? It needn't produce an absolutely certain result, but a good estimate with known ...
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1answer
1k views

How can I soundproof my bedroom walls as cost effectively as possible?

My bedroom is next to the kitchen on one wall, a hallway on one wall, the outdoors on one wall and the PC room on the other. The wall that bothers us the most is the kitchen wall. We would like to ...
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2answers
632 views

Is it safe to run the oven without insulation around it?

My oven had mice in it and made a nest. So I took all the insulation out of it too look for the mouse. This was because it smelled like a dead animal every time I turned on the oven so I cleaned it ...
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2answers
124 views

Is it difficult to work around cellulose installation?

I am a new house owner since July of 2014. I bought a 50 year old house with good bones and a great opportunity to flip it. My attic has a pathetic R5 insulation at the moment. Being a young home ...
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5answers
8k views

Should I encapsulate my crawl space?

Our home was built with a dirt crawl space that is about 2' from ground to bottom of floor joist. The floors are insulated with fiberglass held up (where it hasn't fallen down) with wire rods. The ...
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3answers
11k views

Is super insulating exterior walls with rigid foam board insulation possible?

2" rigid foam-board insulation can have an R-value of up to R-10, layering 4 boards would create a R-40 value, right? However that creates an 8" foam wall above the actual wall. What would be a ...
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4answers
750 views

What is the best way to seal this old fireplace vent?

I am doing some minor renovations to my basement with the drop ceiling and found that one of the geniuses that owned the house before me, used fibreglass ceiling tiles to seal off an old vent for a ...
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1answer
35 views

Where to attach a storm window?

We have two very leaky, single pane windows that we need to insulate. Because interior shrinkwrap storms are impractical for several reasons, we're looking at exterior storms instead. Home Depot has ...
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2answers
90 views

Looking to improve acoustic and thermal performance before relaying wooden floor

We are about to lay new wood floor in the entire upstairs of an old Victorian house. This seems like the perfect opportunity to acoustically (and thermally) insulate the floor to separate it from ...
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2answers
6k views

My neighbor keeps complaining about my music. How to soundproof my apartment?

I live in an old apartment building and the walls are thin. This is a problem because I love to listen to music -- sometimes at odd hours of the night. Yes, I can be an asshole in this way. But my ...
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1answer
110 views

Will adding blown-in insulation to my floor cause a moisture problem?

I have a bedroom above my garage. The builder insulated the floor with R13 kraft faced insulation, leaving an un-insulated space in the floor. I was thinking of blowing insulation in the empty space ...
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2answers
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Do we need to replace wet insulation resulting from a a/c drain

Licensed air conditioning company replaced a part in our air conditioning unit in our attic and while doing so left a drain hose open and leaking water that we did not know about until it dripped ...
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1answer
60 views

Can an IR thermometer be used to check wall insulation?

IR point thermometers have come down a lot in price. IR imaging cameras haven't. Is there a reasonable approach to using the point thermometer to determine how well or poorly insulated my walls ...
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1answer
73 views

Do I need vapor barrier to insulate a cinder block garage?

Similar to How to properly insulate a garage? and Do I need a vapor barrier between the insulation and finish wall in a new garage? both of which do not have answers pertitent to my one particular ...
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0answers
33 views

How should I insulate a 12x24 metal shed?

I am having a 12X24 metal shed delivered today. Wood floor of course with studs to the ceiling. Am adding an air conditioner to use when in this work shop for furniture making. Was wondering how to ...
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1answer
64 views

How can I add insulation above my finished ceiling?

What is the cheapest option for adding insulation above a finished ceiling? There has never been any in the spot that I need it. Should I take the roof off or have it sprayed in? The space is 20 feet ...
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1answer
45 views

Properly insulating crawl space

Currently my crawl space has no insulation. The previous owner put gravel on the ground. I was told by my home inspector that I would save some money on energy costs. However, I'm not sure what's ...
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27 views

Fiberglass insulation in basement

How effective is fiberglass insulation for interior wall separating basement living area from furnace room?