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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43 views

Adding insulation in a finished ceiling with no access

I live in a condo that the builder decided not to put insulation between the different levels. I don't own the condo above me. With hardwood floors and no insulation it's very noisy. My goal is ...
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2answers
30 views

Insulate space above ceiling in 3 season room?

I have a three season room attached to the house, built on a concrete pad. There is no heat or a/c out to the room. The ceiling is currently open and I can see the underside of the planked roof. ...
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2answers
867 views

Insulating a post and beam construction roof/cathedral ceiling

My house (built 1972) has a cathedral ceiling with post-and-beam construction in the main room. The ceiling temperature can get as high as 90F, or even greater on a very hot sunny summer day, as ...
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2answers
110 views

Is it better to fill up the space between rafters with insulation, or put baffles on top and add soffit vents? (inland Los Angeles, cathedral ceiling)

I have 5.25" tall rafters, about 30" on center, with roof planks directly on top of them. I would like to keep the rafters visible, but add insulation between them. So I only have a few inches to work ...
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2answers
224 views

Is it dangerous to use polyisocyanurate without covering it with drywall?

I would like to glue sheets of polyisocyanurate to one basement wall which is very cold in the winter. Due to plumbing and electrical panels, I will not be able to cover the polyiso with drywall. Are ...
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1answer
2k views

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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0answers
121 views

Rockwool / Mineral wool for my crawlspace?

Should I spend extra money and insulate my crawlspace with rockwool? I like that it is easy to install, that it stays in place and looks clean up above. It does cost more per sqft. I have a 1980's ...
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2answers
377 views

Air Seal recessed cans without attic access

I recently discovered moisture in my attic and the mold inspector recommended sealing all the canned lights in our house. We have about 30 in vaulted ceilings where there is no attic access. Any ...
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3answers
75 views

What can fiberglass insulation NOT touch?

I have some rolls of 15" R-13 insulation that I am planning on installing in my floor joists to help sound proof my basement ceiling. Is there anything that the insulation can't touch? I know that the ...
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1answer
1k views

Installing cardboard deflectors (baffles) in attic

Goal I need to install 75 cardboard deflectors (baffles) in my attic. I need to do this so that the cellulose does not go into my soffits. Current Setup I brought myself up three sheets of 2x10 ...
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3answers
75 views

Redoing my roof: how should I redo my insulation?

I live in Denver. My 60 year old house is 1.5 stories. The upstairs has a highly sloped roof and definitely has insulation in the relatively narrow attic and I believe has insulation at the angled ...
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4answers
64 views

Best way(s) to soundproof interior wall between rooms?

I had a few ideas in mind to keep our newborn from waking up our light sleeping toddler sleeping in the adjacent room. I'm open to new suggestions. :-) 1) Blow cellulose from above (unfinished ...
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2answers
55 views

How can I insulate a finished 1 1/2 story space

I have a 1 1/2 story portion on my house that has a finished office space and closet on one side. The room has no insulation as I've done a little work and had to take some drywall off the outer wall ...
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3answers
296 views

Do you tape kraft faced insulation?

So I am going to use 12" R-38 kraft faced insulation in my attic. I plan on face stapling the paper to the bottom chord of each truss. I imagine most of the seams sideways where stapled will ...
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2answers
129 views

Insulating between boiler room and bathroom

Part of my bathroom is directly above the boiler room. The boiler room is only accessible via an external door and is well ventilated with wall and door vents, so I consider it more like an outhouse ...
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1answer
104 views

Insulation and vapor barriers behind Corian/Greenboard shower walls

I've got a small bathroom that I am working on repairing/refinishing. I've removed the existing (leaky) shower and base and am replacing them with Corian-like materials (Kohler's Choreograph for the ...
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2answers
2k views

Cost of XPS panels vs. sprayed closed cell foam

I'm starting the process of finishing my nearly full height (7'2") basement and am costing out the insulation. Based on my research of what's best below grade, I'm debating between XPS foam panels ...
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5answers
16k 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
148 views

How should I insulate an interior wall between a warm humid bathroom and a cold bedroom?

We're redoing the master bath. I'm wondering if and how I should insulate the interior wall. Bedroom is kept at 60F. Bathroom will be warm (radiant floor) and humid even if we have and run vent fan. ...
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1answer
34 views

How to use thinner insulation than the steel studs?

Here in Brazil I can only find insulation that is about 35-40 mm thick. I intend to use it inside steel studs that are 70mm thick and I'm worried it might crumple or sag due to the extra space. What ...
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4answers
124 views

Is it crazy to put a hole on a fridge?

I want to buy a mini fridge, not for food storage, but for storing stuff I don't want to evaporate (gets hot in my room during summers) or preserve. I'm thinking maybe once in a while I want to make ...
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2answers
559 views

What is the minimum thickness of foam board when insulating a basement

What is the minimum thickness of the foamboard insulation that can be used when insulating a concrete basement wall when it comes to moisture control and temperature control? Obviously thicker is ...
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3answers
20 views

Insulation in the attic with ridge vent and eaves

Do I need to leave space over top plate at eaves when adding insulation if I have a ridge vent
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5answers
9k views

Can the blanket Insulation in my basement be left in place when refinishing?

I'm thinking about finishing my basement. It currently has the blanket insulation that the builder installed when we built the house last year. I'm unfamiliar with this product. Is it meant to be used ...
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7answers
36k views

Are curtains effective for keeping the room warm?

I live in a rented apartment and I am trying to find solutions to keep the heat in. The apartment has several big windows (the 'living room' has one wall that is 80% windows) and I have to run the ...
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0answers
324 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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1answer
108 views

Why isn't shed insulation working as I expected?

I insulated my 3x3.5 m metal shed with 55mm thick foil lined "space blanket". Foil inwards, of course, is, not facing the metal. The metal walls & roof was initially & thoroughly lined with ...
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3answers
73 views

Basement insulation w/ existing tar paper and studs

I recently pulled off old wood paneling in my basement, and would like to insulate it using rigid foam (silverboard or durofoam). Behind the panelling, there is tar paper, and 1x2" studs approximately ...
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7answers
49k views

How can I seal the large gap around my fireplace in a way that is safe and prevents air inflows?

I've got a spot by a fireplace that lets cold air in. Unfortunately its right where the metal of the fireplace meets the wooden framing/molding of the fireplace on the inside. This seems like ...
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1answer
68 views

open cinder block wall in basement

I am replacing some framing and sheet rock that has been contaminated by mice. The basement has cinder block walls that come up about half way for some reason. The house was built in the 1950s. In ...
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2answers
82 views

Will foam tape stop condensation on metal windows?

I am having an issue that water is building up on the inside of my metal window. has anyone tried putting foam tape on inside or outside to stop condensation?
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1answer
87 views

How should I insulate my garage roof if I want to use the garage as a workshop?

I have read a lot about proper insulation and ventilation, including some posts on this site, but none adequately answer my questions. My goal is to operate an electric heat source in the ...
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3answers
146 views

How to insulate register boot?

The county inspector dinged me on a couple of things for my bonus room renovation. One of these things is wrapping the register boots (endpoints) in insulation. I've seen registers with this ...
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4answers
224 views

Should I insulate the garage in the home I'm having built?

I am an amateur woodworker and am having a new home built. My part-time workshop will be in the garage. Where I live (central Maryland), the winters are often cold (below freezing) and occasionally ...
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2answers
42 views

Insulate ceiling, walls, or garage door?

I live in Ohio and have created a golf stimulator in my attached garage. The garage typically stays around 10 degrees warmer than the outside without wall insulation except the interior wall. I can ...
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3answers
238 views

How can I stop my windows from leaking when mild winter weather occurs?

We have an 11 year old bungalow and this problem only occurs on the middle section of a bay window. We think that frost happens inside the insulation somewhere and when the temperature outside is mild ...
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0answers
22 views

What type of insulation should I use for varying joist spans of 3-4ft?

I live in the #3 region in California, and am wondering what the most cost effective and functional DIY method for installing insulation under my floors. I have kneeling room crawl space under my ...
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3answers
97 views

Can I add more insulation to my attic?

I currently have pink fiberglass bats in the attic. I wanted to add blown in insulation. My attic space is a bit unique. I'm used to a moderate sized attic that you can access. This attic has no ...
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5answers
259 views

What's a high R-value insulation material alternative to dimensional lumber

Years ago I read somewhere about a building material described like this : a composite/synthetic material (not wood) available in traditional dimensional lumber sizes (e.g. 2x4) rigid enough to have ...
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8answers
13k views

How do I keep my house cool especially my terrace during summer?

I live in Bangalore in an apartment on the top floor and during summer, my terrace (built of concrete) absorbs a lot of heat. When I come home and switch on the fan, it ends warming my room and it is ...
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3answers
97 views

2 layers of plastic film window insulation?

I am insulating a single-pane window with plastic film (http://www.amazon.com/gp/product/B002GKC2GW?keywords=plastic film insulation&qid=1453679450). This window can't be opened, so I will keep ...
4
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2answers
295 views

What's the right way to insulate and frame around this pipe?

I have been studying the latest engineering on how to insulate and frame basements after tearing out a partially finished basement that had wood and insulation in direct contact with the concrete. ...
4
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2answers
170 views

How do I handle baffles at the corners on a hip roof?

What do the energy pros do here in the corner of a hip roof? I don't have enough room to install a baffle. I want to install insulation here, so I'm not sure if I would run into problems with moisture ...
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3answers
637 views

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?
10
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3answers
531 views

Is it required for effectiveness to stretch interior window film?

Thanks in advance! Please let me know if I should provide more specific information, or if this is covered somewhere else. Short version: I am using a Frost King window insulation kit on a window. ...
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0answers
25 views

Attic insulation problem

I am wanting to insulate my roof rafters and finish over it with Sheetrock but it's just my rafters directly to my roof metal, what do I have to do to my roof metal do I can insulate and not worry ...
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3answers
83 views

Can I setup insulation without tearing down walls?

My situation is this: I moved into a new apartment last year and my office is the only room that isn't insulated, which is annoying. My daughter's room and her playroom are both insulated as expected. ...
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4answers
177 views

How to cover exposed attic wall insulation

I have a small walk (crouch)-in attic from the closet of one of my upstairs bedrooms. It has insulation on the walls that form the bedroom closet/wall. Given how small the attic is, whenever I go in ...
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1answer
266 views

knee wall no venting possible

My master bedroom is above my garage. There is one part of the bedroom that has a cathedral ceiling with knee walls on both sides. There is no attic above this area because the drywall goes up along ...
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1answer
41 views

Improving insulation on windows and preventing heat loss

Here are the images of my window (currently it's 18F/-8C outside, 74F/23C inside): Now, this condensation / ice forming gets even worse - on some days whole bottom of the window from the first ...