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 is the Source of the Approximate “R Value” Chart?

There is a Chart labeled Approximate "R Value" of Walls, Windows, Ceiling & Floor in one of the responses to the question How can I measure the r-value of a wall? What is the source of this table? ...
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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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3answers
72 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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15 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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2answers
22 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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4answers
76 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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2answers
52 views

Questions on Basement Insulation & Waterproofing Steps [on hold]

My home was built in 1999, we've lived in it for about 5 years now. Since we moved in, the basement has flooded three times - the last time we had water bubbling up through cracks in the floor and ...
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2answers
204 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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193 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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2answers
311 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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8answers
7k 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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installation of house problem [closed]

I have wiring problems. the capacitor connect across the supply of neutral and live wire of light bulb but to measure between live an neutral no voltage between to live and neutral I get 220 Voltage ...
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20 views

Replace insulation in a Trane HVAC? (TWE030C140B0)

I found a little mold on the foil covering the insulation in my TWE030C140B0 air handler/ AC/Heater. I am 95% sure I have the moisture problem resolved and now I need to replace the insulation. Does ...
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3answers
12k 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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11answers
34k views

Is there a significant benefit to using plastic window insulation year round?

In order to help save more money and funnel more of those savings to debts, I'm looking for more ways to save money. I've heard that puting plastic window insulation over single-pane windows ...
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7answers
13k views

was in attic for an hour without mask. could this cause issue?

my bathroom fan was dropping water so i went up to the attic and applied fiberglass insulation to the bare metal vent pipt from the fan out to the roof. i was up in the attic for an hour wearing ...
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1answer
35 views

Is there long-term off-gassing from polyurethane closed-cell spray foam insulation?

We already installed Quadfoam 2.0, a "two-component, 2 lb., closed cell, spray applied, rigid polyurethane foam system" under the roof of our house, between the rafters. We read the manufacturers ...
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38 views

Insulation over ceiling drywall nailers or scabs

So fiberglass batts 12" thickness. The goal is to not let the insulation become compacted or have gaps between unconditioned and the conditioned space. When a drywall nailer is fastened to the top ...
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3answers
58 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 ...
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2answers
142 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. ...
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2answers
109 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
621 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?
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508 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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1answer
82 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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60 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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377 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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24 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
71 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
84 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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3answers
85 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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33k 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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1answer
216 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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32 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 ...
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268 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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57 views

How Do I Insulate My Bathroom Floor?

I'm renovating my bathroom and I need to insulate the floor. It's a concrete slab with 2x4 joists set on one brick piers. The home was built 50 yrs ago. There was no insulation at all in the floor. ...
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226 views

Getting R38 in roof with 2x8 rafters

I was planning to use foil faced 2" polyiso plus an air gap, plus 5 1/2 rock wool, to get 13+3+23, or r39. But this is all between the rafters below the roof deck, and the polyiso is impermeable. If ...
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37 views

What type of garage door seal is this?

Is this a type I cannot find, or is this just a normal flat rubber type that has been shoved into the kerf cut, folded over, and stapled? If the latter is the case, any idea why someone would do it ...
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2answers
5k views

How to seal between sill plate and foundation wall with wide gap?

Here is a picture of the top of my uninsulated basement wall. The foundation is poured and from early 1970s. For orientation to the photo: the white in the lower left corner is the vertical face of ...
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44 views

Attic Insulation

I have Insulated AC flex duct work in my attic. Am I correct in that since its insulated already if I lay insulation over the duct work it is fine as long as the duct work is sealed properly? I have ...
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1answer
348 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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2answers
63 views

Aerogel insulation viable?

I have read that new aerogel-type insulation offers potentially better efficiency than ordinary fiberglass, albeit with greater cost. Is this true at a practical level? Should I look at replacing some ...
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1answer
56 views

Best insulation to adhere to back of door leading to attic space?

In the closet of an upstairs bedroom, there is a door about 3/4 the size of a normal door that leads to an unheated attic space. It gets pretty chilly in that closet during the winter months, since ...
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2answers
91 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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1answer
40 views

How to seal the exposed top of glass block windows

My basement has some glass block windows, that seem to be improperly (or not-optimally) installed. See picture.... As I understand it, there should has been a perimeter channel attached to framing, ...
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274 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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2answers
1k 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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1answer
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Jenn Air SVE47600 electric slide in range hole in oven--fire hazard?

My Jenn Air SVE47600 16 year old electric slide-in downdraft range has a hole (approx. 1.5" to 2" x 1") in the oven liner (underneath the broiler element) near a steam vent! Seems like it rusted. ...
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52 views

Attic insulation: Giving unfaced insulation a face

I just moved into a small 1950s home. The previous owner had purchased tons of unfaced fiberglass batts and they are still in their bags, piled up in the attic. So I'm going to clean up the little bit ...
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4answers
106 views

Should I use spray foam to insulate a basement?

Home in CT cape w/ uninsulated basement. Its a cold, not drafty house, with new Marvin integrity windows. The basement is very cold, and it seems like the cold basement is making the rest of the house ...
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181 views

Insulating/preventing heat transfer on non-IC rated recessed lights

I recently bought a thermal leak detector and discovered that my recessed lights upstairs are leaking a lot of heat and causing the upstairs to be uncomfortable and hard to cool. This is the brand ...