Questions tagged [insulation]

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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11 views

How to find my IRC zone?

I'm replacing old insulation in a 1962 cape cod style house in the Baltimore area and trying to determine if I need vapor barrier. The more I research, the more complicated the answer becomes. The IRC ...
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Adding more insulation to an exterior wall

I am renovating my kitchen and after I removed the drywall, I have about 3" or so of open wall before I get to the R-15 faced insulation. If I wanted to add more insulation, would I leave the R-...
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Open Space with Hot Roof, best ventilation?

I just purchased a home in Minnesota, the house came with a detached garage with a living space above that we want to make livable. The lower-level is partially buried below grade. The picture ...
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Does facing fiberglass batts matter when installing from attic?

I would like to supplement some existing old woolly pellet insulation in my attic using 6" thick fiberglass batts. Since the size I need seems to only come faced, should I: Face it up (facing ...
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Replace or supplement very old attic insulation

My attic has very old insulation, which I have been told provides very little R-value. I suspect the insulation was from when the house was built in 1909. Question: Should I remove this old insulation ...
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Vapor barrier on bathroom remodel?

I live in the Pacific NorthWest in what I believe is a zone 4 marine environment. Our house was built in 1979 and is in decent but outdated shape. I'm remodeling a 5'x7'bathroom and have removed the ...
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Should I insulate under my cold water tank?

The house is 25 years old, located in South Wales, UK. Previous owners made a total mess of the attic space, taking up rolled insulation all over the place to cut holes for suspect plumbing but that's ...
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Ceiling Register Box Insulation and Airtightness - Is this correct?

I'm in the process of making all the ceiling punctures into my attic air tight and better insulated with caulk and spray foam to reduce moisture and my energy costs. However, the HVAC ceiling register ...
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New fiberglass batts near HVAC ducts

I have R19 fiberglass batts in my attic. There are large soft insulated HVAC ducts covering the batts in some places. I would like to put in new R30 on top of the R19. What is the proper way to ...
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41 views

Is this asbestos pipe insulation

I have been doing work around a house I purchased. Never even thought pipe insulation would have or could have asbestos. My home was built in 1976 and is on Long Island NY (not sure if this helps.) I ...
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58 views

Condensation forming on garage roof despite insulation

I have a condensation problem on the inside of my garage roof. I noticed it in November, lots of condensation forming on the roof but only at the back half of the garage which is slowly being ...
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Is this sort of “wrapped” eave a reasonable eave detail?

So, I've been pondering some thoughts on where walls meet roofs in the vein of Joe Lstiburek's "Perfect Wall" work and how to replicate that in a context that favors "house-shaped" ...
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How to improve insulation in a single room

I would like to stabilize the temperature in our nursery. Currently we need to overheat/cool the rest of the house (using central forced-air heating and cooling) to maintain our desired temperature ...
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How to seal brick and siding corner?

On the exterior of my house, there is a corner where one wall is brick and the other is cedar shingles. There is a some space between the two where cold air gets in and the interior wall that is near ...
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Mildew around window retrofit inserts

Some of the windows in our house have mildew around the replacement window inserts (~18 years old). Mostly at the bottom. The original frames were aluminum, the inserts of course are PVC. The ...
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How do I insulate a living area below a former porch

My brother has an old house probably built in the 30s or 40s in renovated in the 50s. The very front of the house looks like it may have been a converted porch. There was recently a leak which ...
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Pipe insulation, pros and cons

Someone told me that pipe insulation is not necessary, rather he said it could cause more problems. I'm under impression that he's making an excuse because he forgot to put it back. Any inputs, anyone?...
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Mold on underside of attic flooring

I found mold on the underside of my plywood attic flooring. The attic has rollout fiberglass insulation with a paper vapor barrier in the attic joists with no rafter insulation. I have installed ...
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Cost effective insulation for a 100 year old home?

My home is in central Indiana -- climate zone 5. It has lasted 100 years with no insulation at all. I've removed all of the super thick and heavy 3/4" cement sheet rock on the exterior walls and ...
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Best kind of insulation board possible?

I have a wall I need to insulate and have only 2 inches to work with, so I am planning to use some kind of insulated panel board and want to maximize the insulation. Cost is no object, so if it is ...
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Insulating stand-alone studio (shed)

I am looking for advice on insulating a stand-alone studio... I want to keep the "exposed" studs look (similar to board & batten). I plan on installing rigid insulation between the studs,...
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Insulating Behind Completed Kitchen Cabinets

Recently moved into a new home that had just been renovated. The kitchen looks complete, but now that we are here we have started to notice things. In there it is always cold and drafty, and I know ...
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Feedback on creative ways to sound proof - insulate existing finished ceiling

Without going into details on the, well, lets call them 'domestic political restraints' inhibiting me from tearing down the existing ceiling or blowing in insulation, I'd be curious to get some ...
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89 views

How to Insulate a Garage Ceiling

I'm based in NJ and want to convert my attached garage in to a home gym. I just started insulating the exterior walls and will plan on hanging drywall over them when I am done. The shared living ...
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Soffit vents and rafter baffles in finished attic

My house has soffit vent along the eaves of the roof. I am finishing up the attic to create a home office, and I am wondering how should I treat the vents... clearly they are not going to have access ...
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Why is there insulation in the common wall between housing units?

I need to run electrical and network cables (cat6) from the third floor of my house down to the basement where there are different breakers and different computers. So I did a relative measurement in ...
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Options for insulating glass sliding patio door in master bedroom other than replacing it?

Our master bedroom is a lot colder than any other room in the house. From what I can see, the patio door is leaking in a lot of cold. We don't want to replace the entire patio door right now. Looking ...
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How best to insulate these ducts?

When my HVAC system is heating the house, the basement gets super warm and everything in the picture gets warm/hot to touch. I feel like the system is wasting a chunk of energy. Am I right? Should ...
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Insulating small rim joist spaces

My house has very small rim joists spaces in the basement. I have noticed that the floors are cold, as are the walls. So I want to take action and this is where I thought to start. My problem is that ...
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Can I add insulation to my attic and put down plywood so I can walk around more easily?

My house was built in 1992. There are currently faced batts of fiberglass and a few inches of white blown-in insulation that is both scattered in some areas (mostly over the master bedroom from ...
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What to do when spray foam has been removed and still have bad smell?

Several years ago my dad was talked into spray foaming the ceiling of the attic with spray foam. Ever since there has been a tremendous amount of dust and bad smell. Lots of health problems have ...
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What type of door seal is this, and where can I find a replacement?

Below are 2 photos of kerf insulation I have on a double door. I can't seem to find a good match for it at HD or Lowes though. All of the insulation I've found seems to be the wrong shape. Does ...
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73 views

What is this conservatory door part called?

There is draft of cold air coming into the house from my conservatory door. I have noticed that there is a small plastic part that is broken and has left a hole at the bottom of the door. I don't know ...
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Why are there gaps on the garage door seal of my garage door?

I'm looking into thermally insulating the bottom of my Garage door (I live on Long Island NY, so the winters can get a bit cold), and I noticed that there are gaps in the sides of the garage door ...
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How to improve the insulation seal on French Doors to stop drafts?

I have a few french that go to the outside in my house. They look like below, the right door swings out while the left door typically remains closed. In the above photo, the area circled in red is ...
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What type of insulation do i need to replace in my AC air vent registers?

We noticed we had mold on our register grills due to one of our AC unit not draining anymore in the attic (water was ponding in the pan); we had a remediation company come out and they told us we ...
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52 views

Insulating hard to access rim joist

I am currently insulating my rim joists with rigid foam board, then spraying great stuff around the edges. However, there is one rim joist that will be too difficult to get the foam board into because ...
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Best and easiest way to seal insulation above concrete pour in unfinished areas of basements? [closed]

One of the things my crew is doing is trying to quickly make unfinished areas in basements look nicer and easier to clean. We usually stuff all outer joist walls with roxul to insulate and while this ...
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What side of the Typar paper faces the concrete when attaching to the back of the stud wall in my basement?

We are finishing our basement and live in Utah 5 climate zone. We already had the walls framed and now I'm seeing we should have placed the foam board first. Now that the walls are up I'm looking at ...
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92 views

How to achieve R-21 insulation in 3.5 inch exterior wall

I'd like to insulate an exterior 2x4 wall to R-21. It looks like I'll need to use Rigid Foam of some sort. I'm not finding any products at my local store which are 3.5 inches thick. At the moment, ...
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Can I put purple sheetrock over foam insulation?

I have a metal building all above ground. It is not heated because we only use it in the summer. I have put 6 inches of foam in the walls (blue board) to keep it cooler in the summer. Some have told ...
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81 views

Is this insulation in my HVAC installed correctly?

Inside my HVAC (past the horse hair filter) is a large gap before the air hits the radiator. The inside of this area appears to be lined with some kind of fiberglass insulation. I asked maintenance ...
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Should I insulate the duct trunk as I finish my basement?

I'm in the process of finishing my basement and am currently planning out my HVAC. I live in Minnesota so I'm trying to do what I can to maximize heat delivery/retention down there so I don't end up ...
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How is wet cellulose insulation usually blown into walls?

I'm dried-in on new construction on my own house and plan to DIY the insulation as I have done many times. Not looking forward to stapling it up. I see companies offering a wall cellulose solution ...
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Can I use bubble wrap / pluriball to insulate my shed or it is just a waste of time?

I would like to make my small shed / laboratory a little less cold / humid during winter. The main points I can "attack" are the very thin windows and some holes between the wall and roof, ...
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27 views

Safe wrapping for fiberglass around pipes?

If I wrap pipes with fiberglass for insulation but I'm worried about the health risks of exposed fiberglass, is there something that I could wrap around the fiberglass? If so, what and why?
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Insulation exposed behind face of my fireplace

I recently had my house inspected and this was identified. I don't know if the previous owners used this fireplace regularly but it looks like the insulation between the face of the fireplace is ...
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How high to seal vapor retarder in open ceiling basement

I'm finishing my basement with an open ceiling am trying to figure out how high the vapor retarder needs to go. The wall will be insulated with mineral wool and the rim joists with 2" XPS + 3.5&...
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Any issues with insulating exterior 2x4 walls with rock wool, then cover with XPS and drywall?

I am finishing the above-ground basement in my 1950's house, which has 2x4 framing, 16" o.c. I want to insulate as much as possible without breaking the bank (i.e. sprayfoam is out of the ...
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Better, not Perfect way to Insulate Uninsulated Attic Space in older Home

I have an older 2-story home (almost 100yrs) in Ohio, Zone 5. Rafters, walls everything built from 2x4's and 1x6 planks for deck of roof. Just had roof done so not planning on doing a tear off at ...

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