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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What height of insulation should I use between joists in an MDF floor?

Background I am starting my first serious DIY project - converting our garage into a playroom for the kids. The garage floor is concrete. My plan is to run timber (Sawn Kiln Dried Timber (L)3000 x ...
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747 views

How to plan for the future when installing a new roof?

We're hiring a contractor to take off the existing roof, repair/replace any rotted sheathing and rafters, and install a new roof. We've also asked that they add a new plumbing vent stack for a new ...
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243 views

Should I think about insulating a cheap conservatory? if so how do I do it?

I made an offer on a house today that had a cheap upvc conservitory on the back on the house. The conservatory had a cheap plastic sloping roof on that leaked a little, the walls are very thin, and ...
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How to properly insulate a garage?

I'm considering insulating (and drywalling) my garage, which already has insulated garage doors. My main goal is to keep it from getting much below freezing during the winter. This garage is located ...
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AC issues / Insulation of vaulted ceiling

Issue: If it's hot outside, ~90F, house temperature can't get below 79F. Background: 6 year old house, vaulted ceiling with 1 ceiling fan in family room where thermostat is (also 3 large windows, ...
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426 views

Basement Insulation

I am currently insulating my basement. I left the studs far enough away from the concrete wall so I can put r20 in without it compressing. My main question is there is enough space between the studs ...
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515 views

Installation of Polystyrene External Wall Insulation - over old render?

I am considering installing a Polystyrene-block based External Wall Insulation system. Currently the house is blockwork with a rough render. One contractor has told be that the existing render on ...
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1k views

Easiest/Cheapest way to improve insulation of a room

I have a home office, which has 2.5 walls that border the outside of the house, and a floor that is over the garage. It's a nasty combination. It gets quite hot during the part of the day where the ...
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512 views

When should I open a skylight vent?

I have a one-floor (plus basement) house with a large skylight in the living room. It has an openable vent. When is it proper to open the vent? Should I open it in midsummer with the AC on, on ...
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433 views

How to cover gap below garage back door

I have a 3/4" gap between my garage back door (see image. blueish color is outside evening light). Looking for a good way to cover this gap with two goals in mind: Stop rodents from coming in Help ...
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188 views

What to do with this exterior insulation?

We have these sheets of pink insulation with a light coat of concrete-paint-like stuff (?) wrapped all the way around the base of the house, and as can be seen, it is degrading in both appearance and ...
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374 views

insulating exterior walls

I have an old house with no insulation. The walls are 2x4 with plaster and lath. The outside is aluminum siding, in good shape. I would like to blow cellulose insulation inside the wall cavities from ...
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Installing bathroom exhaust fan: what to do with vapour barrier and insulation?

I'm adding a bathroom exhaust fan, which is being mounted in the ceiling of the bathroom (in the attic) and venting out through a vent in the wall. right now, there is a vapour barrier (paper) ...
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how to achieve a reduction of noise of -60 dB in as little thickness as possible of insulation material?

I am looking into materials to acoustically insulate a room, and I need to do it in as little thickness of the material as possible. I found something called Balterio which is a 3 mm thick stuff sold ...
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793 views

Reducing Attic Fire Risk

When I had my house built, it got cold and so we called the local power co-op energy savings expert to give us advice. One of the things he said was that we had the wrong kind of insulation in the ...
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415 views

How do I deciding whether to install an attic venting system?

I live in Colorado, and the weather is starting to warm up. In a couple months, the temperatures will rise pretty high. Thankfully, I have a well insulated house (there is over 20 inches of fiberglass ...
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My kitchen has no real walls. Is this going to be a problem?

I recently redid my kitchen, which included removing the back splash and putting in new tile, but when I went to remove the old tile, I found that the tile is only attached to drywall. Knowing this ...
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How do I avoid condensation issues with an insulated garage roof?

Yesterday it was raining (slight overexaggeration of course) :-) inside my garage... Hood of the car was covered with nasty orange water spots. It's an attached garage. There's no garage "ceiling" ...
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Adding Insulation to Exterior Walls

I am looking at purchasing an older home that is brick on concrete blocks on plaster (from the outside in). I recently heard from someone else in the neighborhood that those homes were not ...
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361 views

Insulation in the attic

I have moisture and a moldy smell in my attic. I had someone come out and open up the eaves and soffets more. It did seem to help but I still have some smell and some moisture. I have insulation on ...
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Insulating ducts in a crawlspace

Consider a source duct from the furnace/AC. The ducts run in a vented crawlspace. The floors atop the crawlspace are a mix of hardwood and kitchen vinyl. The symptoms are: the longer run vents ...
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How do I determine what supplies to buy to insulate an attic?

I would like to add more insulation to an attic. What measurements and points do I need to look at to decide what materials to buy? How do I determine if I need airflow baffles? How do I determine ...
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How bad is it to have wet insulation?

With this recent blizzard we recently saw our ceiling lighting fixture leaking water (slow, about 1 drop every 5 minutes) I got up in the attic and saw that some snow had been apparently blown into ...
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How do you insulate your pipes to protect against freezing?

So, my pipes froze in my house today, and it made me realize that I should better insulate them for the rare days that it gets in the teens here... What should I do to insulate them?
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269 views

Glue crawl space rigid insulation

I've dug a trench around the perimeter of my crawl space. Then I planned the next steps. I took a week off but I'd like to finish this project next weekend. I am going to glue 2" R-10 FOAMULAR 250 ...
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Should I use foam spray insulation in my crawl space?

My crawl space has no insulation. The dirt is wet near one of the walls. There have been termites in the past. I'm thinking of insulating the ceiling (between the joists) and the walls with foam ...
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Determining if there is insulation behind a wall

Learning today that some of our walls are a whole 20 degrees colder than others (all facing east) I'm convinced we may not have proper insulation (it's a new house, but we've head numerous problems ...
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432 views

Extra insulation for panes of aging windows

The original windows on my 30-year-old house are insulated pretty well around the frames, but the panes themselves transmit a lot of cold air, especially when things drop down into the single digits, ...
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Is this insulation supposed to be there?

I was adding some insulation foam into our fireplace as a way of stopping drafts from the chimney. It's obvious that it's installed so we won't ever have it there when a fire is lit (we have not yet ...
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Is insulating an unfinished basement worth it? If so, how should I go about it?

I have an unfinished, well waterproofed basement with cinderblock walls and a concrete floor. All but the top 6 inches / 15 cm or so is underground. Would it be worth insulating the walls down there? ...
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690 views

How do I fix incorrect attic insulation?

I have loose fill attic insulation. It seems to have been moved around and become compact. Is it just as easy as getting in there with a broom and 'fluffing' it up and moving it around, or do I need ...
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How can I seal around a light fixture/light switch outlet?

I Have a house built in 1972. I'm currently 80% finished in installing a ceiling fan into my master bedroom. I had an energy audit about a month ago, which revealed that I had "pretty good sealing" ...
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What happens when a vapor barrier is too close to the cold side?

The vapour barrier must be installed on the warm side of the wall, that is on this interior side of the house. It is permissible to have it sandwiched in the middle between two layers of insulation, ...
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How do I prevent window drafts?

I live in Florida. I have noticed that in the Winter it seems that the cold air leaks through the windows and into the rooms. This, of course, raises my energy bill for heating (yes we have to turn on ...
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Is a vapor barrier necessary beneath blown in cellulose insulation in a garage ceiling in a cold climate?

Is it necessary to put any kind of vapor barrier beneath blown in cellulose insulation in an attached garage? The ceiling is sheetrocked, but that's it. It's a cold, dry climate (north half of ...
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480 views

Additional Vapor Barrier with Faced Insulation?

When installing faced insulation into exterior walls, are there any benefits or detriments to adding an additional vapor barrier to either the non-faced side of the insulation?