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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4answers
419 views

Should I insulate between my basement and main living floor?

I'm in my first winter in a ~140 year old home and attempting to improve efficiency / comfort. The home has a concrete basement (originally sandstone foundation) which is conditioned space, but in ...
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3answers
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Will indoor moisture be a problem with an externally-insulated shipping container?

I'm watching this video by Belinda Carr where she advocates for insulating the outside of the shipping container. She contrasts shipping containers with conventional framed houses. This seems counter-...
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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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1answer
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What is the best way to insulate attic walls in a balloon frame house?

We are insulating the attic in our 1900 house with a balloon frame. The attic had an old wooden floor, so we plan to go over that with either mineral wool or XPS. The floor boards run to the wall ...
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1answer
38 views

Temporary Insulation - Window Fan

I live in an apartment without adequate kitchen ventilation. I like doing a lot of wok cooking, which tends to result in enormous amounts of smoke - tripping smoke alarms and getting into all of my ...
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0answers
28 views

Window insulator kits performance

We live in the snow belt with the temps dropping down to 5-10 for the winter months. The house is 20yo. For the last 2-3 years its windows began to frost overnight, and the heating bill went up. A few ...
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2answers
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What is this material? Could this be containing asbestos or any other harmful material?

[![enter image description here][1]][1] I have this in my furnace room stuffed above the duct and also on the ceiling if u see one of the picture. What is this? Can it be containing something harmful ...
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7answers
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Why is my house energy efficient only in winter?

My electric utility company sent me a graph of my home's electricity usage over time as shown in the picture below. My home beats what the company considers as efficient homes in the neighborhood when ...
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2answers
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Is any amount of moisture normal on exterior sheathing?

I'm renovating a living room in my 1940 two-story home in Central, NY which involved adding insulation where there was previously none. Before the drywall goes up I decided to run some electrical ...
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2answers
38 views

What upholstery materials could be reclaimed for insulation?

That couch my neighbor just threw out has lots of light, fluffy material that superficially seems similar to the light, fluffy stuff behind my drywall. Could it be used similarly? And what about the ...
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1answer
46 views

How can I fix a cold and damp extension room?

We recently bought our first house, a rather old 3-bed terraced house. The adjacent house has been empty for 4 years. The 3rd bedroom in my house is a single room extension I'm using as an office and ...
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How can I add more insulation to my finished attic walls without trapping moisture

I have a finished attic that has a kneewall insulated with fiberglass batts, insulation facing in. The batts fill the depth of the wall cavity completely to the end of the stud, there's no more room ...
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1answer
46 views

Is it safe for knob & tube to be touching insulation facing?

Is it safe for insulation to be placed underneath existing knob and tube if only the insulation paper facing is touching the wires? Or is it be better to remove the insulation and leave a portion of ...
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226 views

Is it possible to seal an interior barn door to provide an acceptable level of insulation between a conditioned and an unconditioned space?

I'm finishing a storage room in my house. General layout, room is 12' x 12', door on one wall, window on opposite wall, roof peak ~12' above the axis between the door and the window. Roof slopes ...
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3answers
487 views

insulate knee wall with faced or unface

Looking for more info on the insulation process of a knee wall. I was thinking of insulating the diagonals of the roof line. not what I'm unsure of is, was is the correct type of insulation faced or ...
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1answer
22 views

Vapour barrier for insulated, occasionally-heated Toronto shed?

I'm building an 8x12 garden shed in Toronto Canada (cold winters, fairly hot & humid summers). 2x4 construction, exterior Tyvek wrap, hardie siding onto studs, roof is metal standing seam over OSB ...
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1answer
50 views

How can I deal with condensation on the vapor barrier in my basement energy walls?

Climate Zone 5A (Eastern Nebraska) I’m needing guidance on properly insulating basement walls that already have 6 mil poly fastened to the wall as part of a basement perimeter drain system. I recently ...
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2answers
62 views

Tips for closing a gap between outside door and floor

The door to my new apartment has a large gap that allows cold air to flow in What is the best, simplest and most effective way to plug this gap?
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1answer
825 views

Fiberglass appearing in home dust

Thin and very straight fibers have been appearing in household dust, primarily in the room which I occupy. I suspect these fibers to be fiberglass. These fibers shine/glint back if illuminated with a ...
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4answers
70 views

How can I install insulation batts between joists with variable spacing?

I am trying to put insulation above a garage but the problem is the space in between the cross beams are different. They varying between 16", 17", 18". What would be the best way to ...
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3answers
91 views

Should I insulate below my in-floor heat where there's conditioned space owned by others below?

I live on the third floor of an apartment complex, meaning I have two neighbors beneath me who essentially heats my apartment. I want to install floor heating through a water heat pump and I have read ...
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2answers
89 views

Potential risk of fire in attic insulation? [duplicate]

I was checking something in the attic today and noticed there are some black spots on the "paper/lining" side of the insulation (picture attached), obviously the black spots are the areas ...
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2answers
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Is foamboard insulation on top of ceiling joists a bad idea? Is there a better solution if I can't have insulation directly on top of ceiling?

I'm installing Armstrong Woodhaven ceiling panels in the kitchen of a ranch home, so the panels will be attached to the ceiling joists, with the backside facing up into the attic (the ceiling is ...
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3answers
62 views

Can I install rigid foam between my rafters to insulate?

Can I double up on an 2" Foamular insulation board to create an R-20 value in my 2x6 rafters Do I cut the foam at the exact 14 1/2" opening or do I cut it at 13 1/2" or 14"
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1answer
157 views

Insulating tiled floor in the basement?

I'm going to use Prova-Flor + 5/8 T&G OSB + Laminate flooring planks for flooring in my basement, so the total height should be around 1 1/2". I'm not sure what to do about the bathroom, though. ...
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163 views

Sequence of Insulation (attic) and drywall finishing

My question is about what is typical / expected on new construction. I have done a lot of remodels (over a dozen) in my life but this is my first 100%, new construction. Contractor is insisting we ...
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2answers
320 views

Insulating basement concrete walls - anything missing?

Live in Zone 5b, going to shoot for 2" of XPS DOW foam board. Planning on gluing it to the concrete wall with foam board glue and bracing it while it cures. It will run to either the top edge of ...
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7answers
2k views

how to reduce heat lost to attic through attic door

I have an attic door which is a hollow core bedroom door and my thermal camera measures it at a good 7 degrees F cooler than the wall around it, which means that I am probably losing heat. The door is ...
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1answer
55 views

Insulation boards with foil facing outside - condensation issues?

AFAIK the best-practice for applying insulation+vapour barrier in cold climates is: inside -> inside wall -> vapour barrior -> insulation -> outside wall (exposed to the elements). If you ...
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3answers
87 views

Do Low-E window films help with winter heat insulation?

We are experiencing cold winters. Just curious if window Low-E tinting (or others options) on actual windows help with heat insulation or if it's just a gimmick. I am referring to actual film (seen ...
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4answers
71 views

Secondary window glazing in Texas

I have 11 square 31"x31" double-glazed windows (likely not low-e glass) that are aluminum framed without a thermal break, so the interior frame becomes almost too hot to touch in the summer ...
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4answers
20k views

Will adding a cool air return in the basement help with summer AC power usage?

Pretty much the title. I have a full basement. Part of it is unfinished and has the water heater, furnace, and washer / dryer. The other part (roughly 1/2 of the total space) is partially finished. It ...
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1answer
90 views

What Rigid Foam Insulation Thickness is Comparable to 300mm Rock Wool Insulation?

I'm in the UK and in a house built pre-1900. In there I have rock wool on top of old rock wool and vermin are finding this very inviting (found out after I bought the house). Because of the smell and ...
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262 views

Would insulating a basement wall with XPS and reflective insulation create a moisture problem?

I'm in Massachusetts (ICC 2015 w/ mods) and want to finish my basement walls. I'm thinking about using a combination of 2" XPS, 1x2s horizontal 24" OC, Reflectix (double reflective ...
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1answer
75 views

Insulating behind tar paper?

I have a home built in 1959 in Southern California with stucco exterior. I’m removing the drywall to do a major renovation and bring my wiring up to code. I noticed there is no insulation and just ...
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2answers
748 views

Attach XPS to back of stud framing?

In the basement that I'm finishing I have an irregular, rough stone foundation wall, pretty dry. I'll use 1" XPS foam insulation, then drywall. Can I build the framing on the floor, attach the XPS to ...
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1answer
44 views

Is there any reason to not caulk/foam between the garage door jamb and rough opening?

There is a gap between the rough edge and the garage door jamb. From some research, it seems like it's common practice to caulk/spray-foam this area to prevent drafts/etc. However, before doing so, I ...
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0answers
27 views

Insulating solid walls, permeable membrane vs solid insulation

I've got an integral garage being converted to living space (bedroom). Around half the longest wall and rear wall is below ground which is insulated and well drained from the outside. Front wall ...
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0answers
36 views

Best material to protect concrete outdoor retaining wall from BBQ/pizza oven built onto it

Note - I've read Should I insulate my pizza oven between the firebrick base and concrete? and Will a slab poured with mortar stand up to service under a pizza oven? but they aren't rerally what I need....
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2answers
1k views

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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3answers
2k views

How can install rafter baffle venting 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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1answer
131 views

What to do if insulation is too thick?

I was careless with an insulation order (months ago, non returnable AFIAK). I bought faced batts of R-30, labeled as 10 inches thick for my garage. However, my garage framed with regular 2x4. How much ...
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1answer
5k views

Sealing a tilt type garage door

I've got a tilt type garage door with gaps on the side. I've sealed the top and bottom, but I'm not sure what to do with the sides. I've googled a bit and it turns out that it's recommended to just ...
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1answer
48 views

How can I insulate this junction box?

I have a junction box in my unfinished attic that supports a light fixture in the room below. It doesn't fit exactly to the lath and plaster and I'd like to insulate for sound intrusion (the attic is ...
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2answers
52 views

insulate walk up attic stairs (not pull down)

I have a full set of stairs that walk up into an unfinished attic space. The full sized access door to these stairs is in a hallway as if its a closet. Unfortunately, the max distance I have under ...
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4answers
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Is there a feasible way to insulate one half of a single room?

I live with my partner in an apartment (I'd say our room is roughly 300~ sqft) and there's a bit of an issue with room temperature that we can't really put down. They love it cold and I prefer it more ...
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Vinyl siding on concrete walls

I have to install vinyl siding on an exterior wall built from concrete blocks. Anyone have any tips on correctly weatherproofing and insulating? I was thinking to lay 3/4 EPS rigid insulation then 1/4 ...
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1answer
37 views

Fiberglass fills attic rafters, planning another 3" of fiberglass perpendicular to rafters, but how should I navigate my attic after installation?

I have fiberglass filling my rafters, very nearly to the top. To meet my insulation target, I plan to install another 3" layer of fiberglass perpendicular to the existing fiberglass... but this ...
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1answer
50 views

vapor barrier insulated attic (floor over garage

I recently hired pros to spray foam my attic, essentially sealing the soffits, roofdeck, ridge vent, and the removed all cellulose insulation to allow air exchange and balance the conditioned space ...
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1answer
1k views

Can spray foam be used between Rim joist and exterior sheathing?

I have a 40 yr old single story modular home set on a block foundation. I used a thermal temperature gun to verify a temperature difference. the insulated wall is approximately 1 to 2 degrees cooler ...

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