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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761 views

Does my wood stove pipe have to be chrome to be safe to use?

I'm currently renting a house that has a wood stove, and figured that as it's used as a rental property, the stove would be safe to use. However a friend of mine today was telling me that if the ...
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1answer
3k views

Can a new ceiling be build directly onto an old one

I would like to build a new ceiling on to an old slightly sagging and poorly finished ceiling (peeling paint and no joint plaster used). I see this way as more convenient and less messy than ripping ...
3
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1answer
185 views

Should I have my old ceiling vacuumed before installing insulation?

My house (built about 1890) has no insulation in the roof and so I plan to put in insulating batts. There is a lot of old dust and a few possum droppings up there, and I have heard that the dust can ...
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3answers
6k views

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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2answers
16k views

What's the best way to keep my garage from freezing?

I live in Colorado. My 1950s house has a one-car attached garage that was built in the 2000s. The walls that are not shared with the house are not insulated: the studs and sheathing are visible from ...
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4answers
3k views

How should I insulate the walls and ceilings of this 1920's semi-detached brick house?

I'm renovating a 1920's semi-detached house. The plaster on the walls was slapped straight on the wall about an inch thick, and the ceilings were lath and plaster which had been overboarded. Most of ...
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2answers
976 views

What should I do about this possible mold I found under paint?

I live in Austin, Texas, which is important in that we don't receive much rain, and it's not very humid. I was peeling paint off of the old drywall, and found what appears to be mold on the bottom of ...
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1answer
2k views

Does it do any good to use fiberglass insulation if you're not going to drywall?

My attached garage is not insulated. When I look up, I see the roof sheathing. I was thinking of adding insulation to the garage. The problem is there is no attic space, so I shouldn't drywall it ...
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1answer
137 views

Is a sealed attic appropriate for Southern California?

I have a two-story house. Half the house has a cathedral ceiling (which will be left as is) and the other half has a traditional attic with no soffits. The only ventilation in the attic comes from two ...
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6answers
8k views

How can I insulate my attic on a tight budget?

My attic is running 135Fahrenheit (55 Celsius) and more right now. And that's before it even gets to the hottest part of the day! The A/C guy said the A/C's are working perfectly. But he tested the ...
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2answers
609 views

Is a thick, unvented hot roof a good candidate for spray foam?

Upon removing some drywall from an unvented hot roof I noticed two serious issues: 1) The roof sheathing is not a taped or sealed ply but a 2x8 T&G 2) There is no vapor barrier and the cavity ...
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3answers
4k views

How should I insulate a bedroom in the attic?

After doing lots of research and reading lots of different opinions I would like to know what is the best way to insulate and vent a 1 1/2 story house that has a bedroom upstairs in the roof/attic ...
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1answer
674 views

Should I install vapor barrier in a seasonal cottage?

I am installing drywall in the bedrooms of a seasonal cottage in northern Ontario. It is unheated in the winter. The cottage is insulated with R14 insulation. Will the installation of a vapour ...
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3answers
1k views

Do I need an air space between insulation and flooring in the attic?

As part of a local council grant, I am getting my attic floor insulation (2 inch thick fibreglass) replaced with 4 inch thick insulation. It will lie between the joists, on top of the plasterboard ...
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1answer
190 views

How do I replace insulation in the corner?

I'm re-insulating a room in my house, and have come to the corner. The studs are arranged like so: x| | | - - x = the space I'm talking about, | = studs of an interior wall, - = studs of an ...
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2answers
5k views

Are there any dangers associated with rigid foam insulation?

Is there any danger of bad fumes/gasses being released from polyisocyanurate or polystyrene rigid foam insulation? I'm planning on insulating my bedroom from the inside (ie: putting the insulation ...
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2answers
2k views

Can I put rigid foam on studs to prevent thermal bridging?

I'm re-insulating an interior wall & putting up drywall to replace the old plaster walls. Rather than screwing the drywall directly into the studs, I'm toying with the idea of putting a 1/2 inch ...
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3answers
15k views

Should I install a vapour barrier if I'm using rigid foam insulation?

I'm re-insulating a room in my house from the inside. I've read that polyisocyanurate (polyiso) rigid foam insulation is the best R-value, so I plan on using that. Details: The house was built in ...
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3answers
658 views

Is there any reason not to use a radiant barrier in the attic?

i am considering putting up a radiant barrier in my attic, with a product like AtticFoil, to 1) reduce the attic temperatures as my A/C ducting is in the attic and 2) to reduce heat convection into my ...
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1answer
541 views

Could space above a drop ceiling and below sound absorbing insulation increase echo in room?

Our builder has asked whether we have any objection to his laying sound insulation on top of the suspended ceiling he's going to install, rather than attaching it to the actual ceiling above. He ...
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1answer
837 views

Should I apply rigid insulation between existing basement framing?

I'm replacing wood paneling in my basement with drywall. There are 1x furring strips attached to the cinder block and covered with tar paper, and the wood paneling was attached to those strips. ...
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3answers
3k views

How can I determine why my A/C runs all day?

I have a Bryant AC/Furnace unit. My house is 10 years old. A heat wave hit this weekend & temps got up to 95°F outside. I had my thermostat set to 75°, and it ran all day. The ...
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3answers
638 views

How do you calculate if it's worth it to insulate?

We live just north of NYC, and the house was built in 1906. We're putting on a new roof and trying to figure out if it's worth it to insulate too. It's a cathedral ceiling on the inside, and we do ...
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2answers
2k views

Solutions for a moist basement?

I live close to the water and there is a high water table around my house. Therefore a lot of water vapor passes through the basement walls. I would like to be able to store stuff in my basement and ...
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3answers
748 views

How can I add insulation to this roof?

We have an A-frame house in Alaska. The ceiling is 2x8 rafters 16" on center with drywall on inside and 5/8" plywood on outside. We installed R-44 insulation in space, no vapor barrier, no air ...
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1answer
307 views

How can I insulate my attic in southern California?

I live in Southern California (San Bernardino county), and I'd like to add insulation in my attic. cathedral ceiling; 1/2 of entire roof has no attic space how do i insulate this space? the other 1/2 ...
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3answers
457 views

How do I insulate space in loft to create music studio

I have 3 DIY created rooms in my large live/work studio/artist loft. They are made with 2x4 and 2x6, framing with drywall walls and plywood ceiling. The apt has 14' 7" ceilings so we just have ...
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3answers
1k views

Is radiant heat in a concrete floor unpleasant in a super-insulated house?

While reading about superinsulation, I came across the idea that a radiant concrete floor is a poor choice if you have really good insulation. The reasoning goes like this: In a regular house you ...
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2answers
402 views

How is this type of weather stripping replaced?

This weather stripping is about 20 years old, and obviously it's no longer doing anything. It seems like it's stuck between those pieces of wood, but I can't tell if it's glued in, or if there are ...
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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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3answers
3k views

How do I determine if I need attic insulation to keep cool in summer?

How can I determine if I need more attic insulation to keep cool in summer? I live in the desert of southern California so it can get pretty hot in the summer (110+ is not uncommon). I would like ...
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1answer
227 views

Can I increase the efficiency of a refrigerator by replacing the door insulation?

I am in the process repainting the refrigerator doors, and cleaning up the rust on the inside of the doors. The question is, would I increase the efficiency of operation by replacing the original ...
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2answers
428 views

How to best insulate an exposed waterpipe during the cold season

i have an exposed (out of the ground) water pipe and during the night freezes over. What is the best way to insulate it so it does not freeze?
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3answers
6k views

Should I insulate a finished basement if there is only 3 degrees difference?

We are finishing our basement and I'm wondering if it is worth putting in insulation if there is only a 3 degrees temperature difference from my upper floors to my basement. This is during the winter ...
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4answers
3k views

Could insulation around copper pipes cause condensation problems?

Should you insulate hot water pipe (copper) located in an attic? I live in Louisiana, where it rarely gets cold. The plumbers insulated the hot water pipe from the tankless water heater. Now ...
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2answers
432 views

How can I block air flow into floor joists in knee wall attic?

I purchased an 55 year old two story home. Upstairs there is a knee wall attic space. There is air coming into the joist area and out of the pot lights downstairs. I can feel the cold breeze with ...
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2answers
10k views

What type of tape is used to seal vapor barrier seams?

If I was installing vapor barrier in Canada, I'd use Tuck® Contractors Sheathing Tape. However, after a trip to the local Home Depot (USA), I came up empty in my search for Tuck Tape. I did find ...
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2answers
9k views

Can I install recessed lighting in vaulted ceiling with 6" rafters?

I would like to install recessed lighting in my vaulted ceiling. One contractor I spoke with suggested not doing that because the rafters are shallow (only 6 inches), which does not leave much room ...
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2answers
5k views

How to Insulate a concrete slab foundation in an older house?

What are some ways to insulate a concrete slab type foundation in an older home built in the 50's? The slab as far as I can tell is not insulated at all and results in a very cold floor and living ...
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2answers
481 views

Is it worth updating my insulation?

I have a 1969 Cape Cod 2,300 square feet, brick and vinyl sided home with cathedral ceilings that I want to update insulation in. I have the original R-7 fiberglass in the walls and R-12 in the ...
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3answers
1k views

What is the best way to patch 3" holes in plaster

I have a number of ~3" holes in my plaster from where my walls were filled with insulation. (Why did they drill a 3" hole? I have no idea). Obviously I would like to fill these holes in, but they ...
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5answers
12k views

Is there an NEC-compliant method of repairing minor damage to electrical wire insulation without a junction box?

While trying to pry loose a stubborn cable staple that fastens a 14-gauge electrical cable to a stud, I accidentally tore a very small hole through both the outer jacket and the insulation around the ...
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2answers
3k views

Do I need to “protect” low voltage cables that are run through an insulated wall?

I'm planning to run speaker cables from a new outlet at an uninsulated wall to a new outlet at an insulated wall. I've already run Cat5e and coaxial cable to the uninsulated wall, and am comfortable ...
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2answers
2k views

Do I need to insulate exposed foundation in my garage?

I have a 2 story split-foyer ranch. The bedrooms upstairs are above the garage and noticeably colder than the rest of the house (I live in Connecticut so winters get pretty cold). There's no climate ...
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2answers
1k views

Are there any types of tile with insulating properties?

Is it possible to buy insulating indoor wall tiles? I have just bought a house and am in the process of slowly renovating it. The bathroom is an extension that was added to the house approx 40 years ...
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1answer
753 views

Will installing an OSB floor in the attic create moisture problems?

I installed some new OSB flooring in my attic. The area it covers is about 160 sq. ft. The total area of the attic is about 750 sq. ft. There is just blown fiberglass up there, and there is no vapor ...
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2answers
181 views

How can I insulate a window against the sound caused by high winds?

I'm on the top floor of an exposed block of flats which is currently being battered by high winds on a nightly basis. I have draught excluders fitted but there's still a lot of noise that comes in ...
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1answer
2k views

Should I add a vapor barrier to kraft faced insulation?

I am redoing our master bath. We completely gutted the room, and I have two exterior walls with R13 kraft paper faced insulation. Should I add a 6 mil plastic vapor barrier to the walls? Would it trap ...
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1answer
1k views

How can I install r-max insulation on the interior side of a cinderblock wall?

I am planning on insulating the lower level of my house with R-Max in a method similar to this: I have a few question about it though: Can I use something other than Treated wood as this is ...
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2answers
1k views

How can I floor my loft without compressing the insulation?

I want to board over my loft for storage, but before I do I ought to improve the insulation which is very old and thin. My UK house is 105yrs old so the rafters are not as high as the recommended ...