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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16 views

Insulation overhang kitchen area from outside

I have a 2'x10' area which is overhang and remains very cold durinng winter. I have access to the floor joists from basement underneath the overhang area and have stuffed enough insulation there. I ...
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Using radiant barrier to keep a room warm

I have been told (including in comments by awesome user Unslander Monica) that a foil sheet placed on the interior side of an air-sealed window can help prevent radiative heat loss through that window....
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air gap between insulation batts and subfloor

I'm looking at the insulation in a crawl space below the first floor of my home. Joists are I-beams (12" deep, model TJI 350), 12" on center. Insulation is R19 fiberglass bats, tight-...
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Window film affixed to the wall around a window?

Useful related questions: here, here. I live in an apartment with a window that I want to insulate during the winter. I am currently using one of those shrink film kits and it seems to be working. ...
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Impact of small gaps in insulation on conductive and radiative heat loss?

When insulating a room , what is the effect of small gaps in the insulation on the degree of conductive heat loss? On radiative heat loss? What other major factors affect the answer? (I presume that ...
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Deck the halls with bubble wrap?

In order to insulate a room, would it make sense to apply a layer of bubble wrap to my walls/ceiling? What about some other material like mylar or foylon? What major factors would affect the answer to ...
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Can I use two layers of window film to create a narrow, convection-reducing gap?

This is a follow-up to this question. The official answerer A.I. Breveleri writes: The ideal separation distance between film and glass is 1/2 inch. Even 1 inch is too thick as it allows the trapped ...
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Wool batting window quilt? [duplicate]

Would it make sense to use wool batting like this as a window quilt? Why or why not? What factors would affect its suitability? For context, I propose using this on the inside of one of those shrink ...
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Aerogel winter window quilt?

Would it possibly make sense for me to use aerogel as a seasonal window quilt? It may depend critically on some other factors; if so, what are they? In particular, I have heard that aerogel designed ...
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Unfinished basement - options for exposed concrete wall in finished room

We're purchasing a home with a large, unfinished basement having a poured concrete foundation and walls. This home is in Minnesota, so there's a seasonal consideration with temperature and moisture. ...
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R-value of textiles

Does anyone know of any good sources of information about the R-value of various textiles, like blankets and quilts of various materials/thicknesses in various conditions?
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Vapor barrier on heated entertainment shed

i am building an 8x10 entertainment shed with a loft for kids to hang out and have sleepovers in, i will be heating it. I have tyvek and t1-11 it is on 4x4 skids on top of the Concrete patio and has 3/...
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How to repair garage wall? (Oriented Strand Board, Insulation, Drywall)

I had a plumber and electrician do some work and they left a big rectangle open in my garage. I need to repair OSB board, maybe replace insulation, and finally drywall. Not sure if I need to replace, ...
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Trying to identify gray crumbly filler material

This stuff was used at some point to fill gaps around a threshold in our house. Could it be asbestos?
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What is the proper insulation assembly for porch

Newly built porch is poor construction quality and leaky (air, not water). Siding is T1-11 with many double insulated vinyl windows. Porch size is about 14'x20'. We have caulked and will spray foam ...
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Can a vapor barrier follow the profile of floor joists?

I'm renovating the 4th and top floor of a house built in 1906 in Rotterdam, the Netherlands. The house has masonry load-bearing walls and wooden beams. The current situation is shown in the image ...
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How does denim insulation perform at low ambient temperatures?

I am interested in how denim insulation like this performs at low ambient temperatures. Does anyone know? I am most interested in performance measures like R-value and what other factors affect this. ...
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What type of insulation/sheathing material is this?

I have a house that was originally built in Chicago in 1954 that had an addition put on in the 90's. The original roof and part of the original exterior was built over is now visible in the attic of ...
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Insulate my window with water heater blankets?

I have some windows that I want to insulate at night during the winter. Would it make sense to use water heater blankets, doing something or other to secure the edges? I'm wondering whether you think ...
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Fire safety with polystyrene

I would like to use foil-faced expanded polystyrene boards to insulate my window at night.* That window is located a foot or two above my electric baseboard heater.** To me it seems like this could ...
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How to put out a polystyrene fire?

I'm planning to use some polystyrene in a project. I will try to avoid all fire hazards, but in case the worst happens is there anything special I should know about how to fight polystyrene fires? ...
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How does the insulation value of multiple layers of insulation compare to a single layer of the same total thickness?

If I insulate a surface with two sheets of rigid foam insulation with thickness x, or with one sheet of otherwise identical rigid foam insulation with thickness 2x, how should I think about the ...
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Will any thickness of Kingspan K118 do for an existing wall in my house?

The wall is in a 45 year old house that has standard UK cavity walls (red-brick on the outside, cavity, concrete blocks on the inside). Kooltherm K118 Insulated Plasterboard is what I'm thinking about....
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Is polystyrene safe to use as a wall of a grow box?

I'm building a small 40x40x40 cm grow box that will be used mainly for seeds germination. When operating, it will be completely sealed. My question is: Is it safe to use polystyrene boards as direct ...
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How to seal around metal gas pipe penetration through poured concrete above ground?

I have a gas pipe that comes through my poured concrete foundation about 12 inches off the ground: It is not sealed around the pipe on the outside. The gap is definitely large enough for insects to ...
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How can I join 20“x20”x1" panels into a one-end-open box?

This is an attempt to ask a more-focused version of a prior question (How best to join (in reversible manner) 5 20"x20"x1" panels (4 air filters, 1 plywood) into open-ended box?), that ...
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How can I remove moisture and odor from wall insulation?

Backstory There is a gap between the ground and the wall. Inside I can see the insulation that is there. Problem Unfortunately the pet made this insulation a temporary toilet so it has been peed upon ...
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How to insulate/ventilate a roof without an attic?

I'm remodeling the upper floor of a ~100 year-old house near Portland, OR. It's down to beams: all the drywall (and plaster) has been removed, along with all the old insulation. I'm about to replace ...
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Should there be insulation inside a light fixture?

I recently moved into a new home, and I was replacing a light bulb when I found this after removing the glass cover. Now, I don't know much about codes and regulations, and I'm new to working on my ...
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Repair torn insulation facing paper with tape?

Two problems with the image below. The paper is torn in spots. Can I just tape over that with shipping tape? Or what else? Also, the paper doesn't reach the stud on the right side. Can I use tape ...
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Proper glue for sticking foam on window glass? Strong enough, removable, and without gap

Winter is coming. I plan to stick soft polyethelene foam on window glass for thermal insulation. Last time I use Styrofoam glue, and it is a disaster. It is hard to remove it. It take hours with ...
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How to insulate metal roof on shed and avoid condensation?

I’m fixing up an old uninsulated shed. The roof — built of metal sheeting on plywood, nailed to the 2-by-4 rafters — needs to be insulated. What is the best way to insulate the roof that avoids ...
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Does this insulation need to be replaced? Does it contain asbestos?

This is a 60y old house but I am not sure when the bathroom that is downstairs was built this is in the ceiling and I would like to know what sort of insulation to use the bath tub that I just ...
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Chimney with adjacent brick shafts into attic

I have dual fireplaces back-to-back on either side of a wall. They are separate fireplaces; there is clearly a solid barrier at the back of each fireplace. They and the whole chimney are brick. We ...
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insulating under stair

Following on from my another question, I'm now looking to add insulation to my under stair storage cupboard. I want to add insulation to the back wall and floor. There is a damp proof course on the ...
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How can I insulate under flooring panels in my attic?

I am removing the original barely-still-there insulation in my 1950 attic (S. Cal.) and then sealing and then placing R 30 fiberglass batting. A problem I have is that about 5%-10% of the attic is ...
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West wall of house in Phoenix is cinder block with no insulation. How can I insulate it?

A north/south situated single level townhome in Phoenix has a west facing wall that bakes in the summer heat. It's about 10' tall. The interior walls are 8'. Both bedrooms and bathrooms are ...
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How can I insulate the door to my attic?

I have a 5 level townhouse; heat seems to come out of the area around the door to the attic in warm days. is it possible to add insulation to this attic and door? the attic is walkable and has plywood ...
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What kind of exterior wall insulation is this?

After some searching, I'm guessing it might be "encapsulated" insulation but I don't know. It's unmarked and, as you might see, it's it's tucked into the corner and bulging in the middle. I ...
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Installing Roof - What else should be done?

When installing a new roof, what other work would be convenient to do? Since I'm having a new roof installed, I'm curious if there is something I would regret not doing in a few years. Potentially ...
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Can drywall be attached directly to foam insulation or do furring strips need to be between them?

I have a basement wall that was recently finished with drywall and insulation. Instead of attaching the drywall directly to furring strips with foam under the furring strips, the drywall was attached ...
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How do I staple faced insulation to ceiling joists if the flange has been cut off for narrower spaces?

I'm insulating a detached home office/shed. For the ceiling, the rafters are 24in on center so I got 22" faced insulation for that. However on the ends of the structure, the rafters are only 21in ...
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Insulating shower exterior wall

Redoing a bathroom where one of the shower walls is an exterior wall. Framing is done with 2x6 and I would like to replace the current insulation pictured with XPS foam board. Due to my location, the ...
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Finishing attic with static vent

I have a 1920s building with a gable roof that has a 10' peak. I'm going to finish the space and had an engineer detail the specs for structural safety, but I'm stuck on the appropriate way to provide ...
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Can a wood cabin be laid directly on a existing concrete foundation if a DPC is added?

I am figuring out the foundation for a small wood cabin for my back garden, due to height being a premium I was wondering if I could put the wood directly on an existing garage foundation. Providing I ...
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Sistering 2x8s to 2x4 truss system for vaulted ceiling?

The Question (see pic below): Can I safely sister 2x8s to a 2x4 king post truss/open rafter system to achieve an insulated open ceiling/vaulted design. The Details: I have a garage that is 18 feet ...
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Greenhouse subfloor (greenhouse on top of concrete) — best material?

I'm putting together a greenhouse, 10x13-feet base. Unfortunately it will be on a concrete-paved section of my backyard, and I know it will lose a lot of heat to the ground via conduction in ...
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How to solve Hot Upstairs but cold basement

I have central air in my house(20 year old house). In my basement it gets cool, and cold air is coming from a vent in the ceiling. My upstairs gets really warm and humid even though central air is on. ...
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Faced or Unfaced Fiberglass in a basement stud cavity that has IPS Foil Board?

Insulating in Zone 5. Basement is 90% below grade, maybe 8" to 12" exposed foundation around the top of the basement wall. Applying R-6 Foil Faced Poly Iso to the poured concrete wall, then ...
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My oven insulation is burning when I bake [closed]

My oven burns every time I bake. The insulation always seems to light up when I use it. Also, some rats infested it a while back and really caused damage but they all died.

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