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 type and rating of insulation should be used in a basement bathroom?

I need to replace the insulation on the back and side of the bathtub. The walls face the exterior of the house (poured foundation). What type and rating should I use? I can't tell what the ...
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165 views

Can I insulate over 1/2 in. styrofoam?

We have a rec room (basement) from the 60's that we are redoing. Currently on the outside walls, they have 1 x 2 studding then 1/2 inch white styrofoam then vapour barrier. WE are wondering if we ...
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120 views

Why am I getting condensation on vapour barrier?

I installed some vapour barriers on the windows recently due to it getting a bit cold, but have been noticing that I've been getting a fair bit of condensation on the inside facing part of the ...
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2answers
233 views

How to insulate my garage walls using sheathing

My garage is a pole building type with pressed wood walls and exterior siding. I want to put sheathing on the walls for some insulation. The girts that the exterior wall is attached to are 1.5" x 4" ...
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257 views

What specifications should I look at when choosing an exterior door?

I'm considering replacing the front door, and I'd like to know what to look for to get the most insulation. When shopping for doors, I'm not sure what I should be looking at to determine which doors ...
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443 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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434 views

PIR/PUR laminated panels…sources? Similar products? (Interior insulated panels)

We have a 1/2 story that was cheaply finished prior to us moving in. Looking into it, it looks like we have 4-5" of fiberglass bat insulation in the ceiling which is, if we're lucky, something like ...
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2k views

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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44 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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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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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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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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61 views

How can I insulate a combo basement/crawspace?

I live in Louisville, Kentucky, so we have relatively cold winters (nighttime lows consistently below freezing) and relatively hot, humid summers (daytime highs consistently in the muggy 90s). My ...
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47 views

Does this count as a material alteration or repair for code purposes

Ontario Building Code, 2012 Except as provided in Section 3.17. of Division B, Section 9.40. of Division B and Part 11 of Division B, if an existing building is extended or is subject to ...
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2answers
109 views

How can I secure a metal frame to polyurethane foam?

I have used polyurethane foam to cover a 5 cm (2 inch) horizontal gap between a metal door and the ground. Polyurethane foam , as I know , needs to be covered with cement in order to withstand the ...
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115 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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69 views

How can I add more insulation to this roof?

We've recently leased an office in a tropical climate and I am trying to figure out the best way to increase the insulation in the building. So far I've researched: spray insulation (options are ...
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147 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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161 views

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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289 views

Should I install drywall or plywood above a drop ceiling to increase the insulation value?

I am currently insulating a new room in my house. I am planning to put up a drop ceiling. I have insulated between my roof trusses. Do I need anything else between my drop ceiling and attic space ...
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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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2answers
307 views

Is a PTHP a HVAC option for a super insulated structure?

Is a Packaged Terminal Heat Pump a good HVAC system for a structure that is super insulated or passively insulated assuming the unit is sized and fitted to meet the needs of the structure. There is ...
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269 views

Do I need to add a protective layer to insulation for wall heater?

I am going to install a 4000 watt wall heater to an add on. It is the kind of wall heater that is seated in the wall. i also plan to install insulation in between my wall studs. there will be ...
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124 views

Whats the difference between metal and plastic insulation support fixings?

I am putting 30mm of fibre insulation on a party wall and then covering it with 12.5mm soundbloc plasterboard which will then be skimmed. Does it matter whether I use plastic or metal insulation ...
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233 views

Would a memory foam topper be a sufficient sound and vibration baffle for Dance Dance Revolution? [closed]

For the past several months, my roommates and I have taken to enjoying varying builds of Dance Dance Revolution in the evenings, inclusive of X, MAX 2, and Supernova 2. I personally have gotten ...
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2k 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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49 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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3answers
664 views

How to apply wallpaper over styrofoam?

I live in an attic, and the head part of my bed is in a corner where the roof slope, an outer wall and the wall to the neighbour's unheated attic meet. After a few winters of waking up to the feeling ...
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3answers
466 views

How do I insulate exterior basement wall?

Working from scratch with a bare wall. What do I do? 3 hardware stores have told me 3 different things. We have very cold winters here. Looking for cheapest and highest R value. contractor next door ...
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2answers
117 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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1k views

Should I block or insulate my air vents for the winter?

I live in a house which consists of a 17 year old extension on a 40 something year old cottage. The two main bedrooms are the only rooms in the house with air vents. They are also two of the coldest ...
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4answers
739 views

Can I paint over XPS insulation?

I've a top floor apartment in India which gets almost like an oven during the summers which is like for 9 months out of 12. I've decided to apply under the deck XPS 50mm (nailed to the ceiling). I ...
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196 views

What is the best removable insulation material?

There is a crack in a wall that I would like to fill with some removable insulation. It must be removable, as such it should just be a temporary solution. I know of rockwool and glasswool, but don't ...
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7k views

Should I install a moisture barrier behind drywall in house with T1-11 siding?

My home interior walls are thick redwood paneling in the bay area mountains. i'm about to start removing the wood in my second bedroom and want to install a moisture barrier on the 1 outside wall of ...
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50 views

What type of insulation should be used to deter subterranean termites?

My house's structure is made of wood and there are subterranean termites (non-formosan) in my yard and area. I am planning to excavate and insulate the slab perimeter in the interests of saving on ...
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79 views

Insulate garage ceiling

I want to insulate the ceiling of my garage, to make the family room above it warmer. The problem is that the garage has a finished ceiling (no exposed beams), so how to I affix the insulation to the ...
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72 views

Help translate terminology relating to flat roof construction

I just bought a house which had an extension done 12 years ago. I am about to do some work in this area and want to understand what has been done before. Below is a screen shot of the bits of the ...
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73 views

Should I remove, or work around dividing basement walls?

The basement of my house is bare concrete floor with bare concrete block walls. I'm in Canada and would like to (and should) insulate these walls, at least the above-grade portion, which is about ...
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113 views

Crawl Space Encapsulation Question

I live in Georgia (around the Atlanta area) and recently discovered mold in the crawl space of my home (I plan to have the mold professionally removed). My crawl space is about 30' by 15' (4' to 15' ...
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148 views

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
740 views

Should I have cavity wall insulation installed?

I have the option to get cavity wall insulation done for free in my home, but i'm not sure if its a good idea or not. I've heard people say it can cause issues with damp, its hard to get out if ...
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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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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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35 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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1answer
66 views

How do I stop the second floor of my house from being so hot in the summer and so cold in the winter

I have a window AC upstairs in the summer but it is not enough I can fell the heat coming off of the ceiling in the summer and in the winter it is way to cold that my kids have to sleep downstairs ...
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1answer
138 views

How would you repair this exterior foundation insulation/wrap?

A home I purchased, which was built in 2005 located in the upper Minnesota/US (frigid winters, balmy summers) has the larger faces of the above-grade poured foundation covered in a strange insulation ...
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67 views

Proper order of operations for re-doing windows, stucco, and footing insulation

I have three big projects coming up: Replacing all the windows and a sliding glass door Adding 2 inches of rigid foam insulation to the exterior and re-stucco-ing Adding rigid foam insulation ...
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33 views

Worth it to add footing insulation if there's already a thermal break?

I've been considering insulating the outside perimeter footings of my 1972 ranch house in northern New Mexico. The slab-on-grade it's built on (that constitutes the subfloor) reaches a temperature ...
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57 views

Is insulation blockinng airflow of my vented soffit?

I have insulation shoved in front of my vented soffit's should the insulation Be there It was already there when we moved I didn't think much of an till I started doing some research after I blew in ...
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90 views

Turning a mobile home with a basement into a recording studio

I recently moved into a mobile home that has a basement. The basement was an apartment, but had multiple issues with mold and frozen/broken water pipes. The owner was prepared to demolish the entire ...