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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373 views

How can I air seal around a brick chimney with a metal flue liner?

We have a 1954 brick chimney that has a metal liner inside and is only used by the natural gas hot water tank. It's had fiberglass right up against if for guessing 20+ years. I'm air sealing the ...
4
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2answers
120 views

Do I leave this insulation up?

I am researching how to finish one room in my basement, and not sure what to do with what I think is vapor barrier or wall wrap insulation. Its only on two of the four walls which I assume is because ...
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1answer
104 views

Kitchen remodel to studs, infilling a window, no insulation, no building wrap!

looking for some urgent feedback. My Husband and I are remodeling our kitchen. We're down to the studs, and two of the walls are exterior. The house is a 1920's bungalow. We're actually making our ...
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7answers
62k views

Should I insulate air conditioner coolant pipes?

I recently replaced some rotted insulation on the coolant pipe that runs out of my AC unit and into the evaporator in my house. When cleaning inside the actual AC unit itself I noticed that the ...
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7answers
13k views

Is insulating an unfinished basement worth it? If so, how should I go about it?

I have an unfinished, well waterproofed basement with cinderblock walls and a concrete floor. All but the top 6 inches / 15 cm or so is underground. Would it be worth insulating the walls down there? ...
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1answer
85 views

Which is more effective in a 3.5“ stud bay--”R13“ or ”R19" batt insulation?

I have extra R19 insulation batts (designed for a 2x6 bay)--should I use them in a 3.5" stud cavity, or does compressing them that much make them less effective than R13 batts in the same space?
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2answers
14k views

What can I do to reduce cold infiltration by a direct-vent gas fire place?

My home has a direct-vent gas fire place on the ground floor, and each winter the area around the fire place inside the house becomes very cold (granite finish). On colder days, the carpeted floor ...
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2answers
51 views

South Florida roof softit roof ventilation and of insulation batts

I live in south Florida and am insulating the roof by placing batts between the rafters. I'm not sure if placing the batts up against the edge where the beams and walls meet is ok or not. The rafters ...
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2answers
40 views

Correct Glue for Foam Outsulation?

My house is masonry block about halfway up and then wood siding with top. Two months ago I had outsulation installed. It’s made up of 2x4 feet foam panels that are 2 inches thick. These are covered ...
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1answer
45 views

Can fiberglass insulation cause leaks?

I've recently bought a 100 year old wood frame house from a DiY guy who took decent care of the place. He didn't put any insulation in the attic though and my home inspector said insulation is a great ...
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6answers
21k views

Can I install cellulose insulation without a blower machine?

I've purchased a few bags of loose fill cellulose insulation from the local hardware store (GreenFiber brand). How will the insulation work if I don't put it through the machine to fluff it and force ...
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2answers
747 views

PIR/PUR laminated panels…sources? Similar products? (Interior insulated panels)

We have a 1/2 story that was cheaply finished prior to us moving in. Looking into it, it looks like we have 4-5" of fiberglass bat insulation in the ceiling which is, if we're lucky, something like r-...
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0answers
68 views

Monolithic frost proof shallow foundation, advice on the smaller details?

I'm building a 16x24 shed/garage. I have done most of the site work and I have a concrete guy starting tomorrow on the forms in preparation for a pour on Friday. He's done insulated slabs, he has 30 ...
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4answers
2k views

Rim Joist Insulation without a Sill Plate

I've seen a few similar questions but the answers don't add up... I would like to use some rigid foam insulation to insulate my rim joists. Here is the problem: everything I have seen shows putting ...
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0answers
298 views

Is it worth spending extra on R14 or R20 fiberglass insulation

I've put in 1" Type 1 polystyrene (estimated at R3.75) around the exterior walls and I'm deciding which insulation to use in the framing. The R12 works out to $.38 p/sqft The R14 works out to $.54 p/...
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1answer
155 views

What are my options to fix cold and drafty floors over a vented crawl space?

I have a 1950s bungalow that sits on a crawl space. The crawl space is vented and has moisture problems (which I should/will fix, but that's not the main point of this question). R19 insulation is ...
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1answer
43 views

Interested in home will mold problem . Can mold be in carpeting? Howe do i remove

Interested in purchasing a home that has been empty for several years. Has a little mold on upstairs walls able to take care of that. One room has ceiling repairs with mold. Can the mold go up into ...
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2answers
76 views

How do I insulate a crawl space?

I have approx 500 sq. ft. of crawl space (under addition to original home). 15 x 35 ft. with 2 x 10 joist & concrete flooring ( no dirt ). Ventilated to outside is provided by 3 windows. The ...
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1answer
78 views

What type of insulation should I use in a knee wall?

We have an unfinished bonus room over the garage on the second floor. A normal door goes to it and same height as rest of the 2nd floors and full sized windows and the house was zoned for the ...
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2answers
276 views

What product will insulate an exterior PVC pipe coming out of the ground with a faucet on it?

We want to insulate from freezing an exterior 24" tall PVC pipe coming out of the ground that has a faucet on it ~ a heated product is not plausible in our situation. Are there other products that ...
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1answer
82 views

Is it okay to 'sandwich' rigid foam insulation between old and new sheet siding?

I am putting new LP Smart Siding (4'x 8' and 3//8" thick) onto my house, which will overlay old T1-11 siding. I would like to put R-MAX 1/2" rigid foam insulation under the new siding. Is this okay?
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1answer
200 views

How to add insulation to a hollow core exterior door?

During some renovations to my house and I removed some wood-paneling and uncovered an exterior door. The door faces west, so it gets the late afternoon sun and in Phoenix, the door gets hot. ...
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5answers
23k views

How can I insulate my fireplace when it's not in use?

I have a wood burning fireplace insert, that is not currently being used. Now that it's cold in my area (27F), I've noticed that there is quite a draft coming from the fireplace. How can I cover/...
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3answers
884 views

How do I insulate space in loft to create music studio

I have 3 DIY created rooms in my large live/work studio/artist loft. They are made with 2x4 and 2x6, framing with drywall walls and plywood ceiling. The apt has 14' 7" ceilings so we just have ...
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1answer
113 views

Causes of condensation in basement wall

First time home owner of 1 year old house in Southern Ontario. South facing basement wall (50% above grade) has condensation forming between polyethylene barrier and pink batt insulation. What ...
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2answers
580 views

How could one insulate sill plate from the outside?

My house has a gap between the Basement wall and Sill Plate (location best shown in this picture). While there are several question and answers here, I have not found any that deals with a fix from ...
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2answers
11k views

My neighbor keeps complaining about my music. How to soundproof my apartment?

I live in an old apartment building and the walls are thin. This is a problem because I love to listen to music -- sometimes at odd hours of the night. Yes, I can be an asshole in this way. But my ...
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2answers
154 views

elegant attic hatch design for several purposes

My attic hatch measures roughly 2' square. Presently, it has insulation on top of the hatch door (in the attic). Because some of the hatch sticks up above the insulation on the floor of the attic, I'...
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2answers
3k views

Do I need to insulate exposed foundation in my garage?

I have a 2 story split-foyer ranch. The bedrooms upstairs are above the garage and noticeably colder than the rest of the house (I live in Connecticut so winters get pretty cold). There's no climate ...
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0answers
83 views

Faced or unfaced insulation in floor above unconditioned crawlspace?

I'm insulating my floor. I live in a dry climate with cold winters and R-30 is recommended. I am insulating from below so cannot staple the facing paper. What is typical for this application? ...
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3answers
113 views

Would enveloping an attic in insulation cause any problems?

My attic currently has batt insulation between the joists, and a second layer of batt insulation on top of that. In the summer, the second floor is quite a bit warmer than the first floor. I'm ...
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0answers
31 views

Saturated insulation Under Mobile Home

I live in a mobile home on piers, in Florida.There was a broken water pipe to the outside faucet that I have fixed, but, during the leak all the insulation under my mobile got saturated. How can I ...
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1answer
82 views

Attic Insulation (floor or ceiling?)

Is it better to insulate in between the slanted ceiling joist Or floor joists in the attic if you have a whole house attic fan? Or both? In long: Out of budget reasons I was thinking of leaving ...
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1answer
62 views

Replace batt insulation or leave it?

Currently, the exterior walls have batt insulation. It has the paper face on one side. A few months ago, I removed a window due to watered down drywall caused by the window. At the time, I didn't ...
2
votes
1answer
78 views

Can a recessed IC-rated housing be in contact with nonmetallic sheathed cable?

I have recently installed 8 of these 5 inch insulation contact rated remodler housings in my kitchen. Two of the holes I made were close to an existing nonmetallic sheathed cable (NM) running through ...
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0answers
29 views

how install insulation to pitched ceiling with no measurable space between ceilng and roof

how can insulation be applied to pitched ceiling covered with dry wall so thin when new roof was installed nails came through the ceiling. once sprayed insulation is sprayed on can it be covered with ...
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1answer
22 views

Concerned about the outcome of insulation fibers

I was working in an attic ,an exhaust fan was turned on I immiedetly breathed and was choked with the insulation to the point I couldn't breath ,I now feel it in my lungs as uncomfortable ,any idea if ...
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2answers
243 views

How do I insulate a strip foundation from below?

While building a strip foundation (a concrete wall starting several feet below ground) I have to insulate it from moisture because otherwise moisture will get into the foundation and into the basement....
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2answers
126 views

Insulated radiator foil

I'm concerned that the insulation/ cardboard foil that's behind my recessed radiator is asbestos. My house was built in 1960. Does anyone know if they made that stuff with asbestos? Before purchasing ...
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2answers
3k views

Can I put rigid foam on studs to prevent thermal bridging?

I'm re-insulating an interior wall & putting up drywall to replace the old plaster walls. Rather than screwing the drywall directly into the studs, I'm toying with the idea of putting a 1/2 inch ...
5
votes
6answers
24k views

Should I encapsulate my crawl space?

Our home was built with a dirt crawl space that is about 2' from ground to bottom of floor joist. The floors are insulated with fiberglass held up (where it hasn't fallen down) with wire rods. The AC/...
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3answers
60 views

Is the material encasing a steam heating system asbestos? How can i determine this?

I'm looking to purchase a home. It has a steam heat boiler system, wrapped in a white material that seems "old". Is it possibly asbestos? How do I test to see?
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1answer
118 views

Can you paint Dow THERMAX WHITE FINISH INSULATION?

Can you paint the insulation boards after installing them? This would be for an attic interior installation. Then could I skip the dry wall? How good would it look compared to drywall?
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votes
1answer
72 views

How can I increase the effectiveness of the A/C in a hot 2nd floor converted attic master suite?

Just bought a 1940's masonry construction house. House has a finished basement (cold as a meat locker), first floor (comfortable) and 2nd floor (too hot). The 2nd floor is an attic that has been ...
3
votes
1answer
126 views

How do I dry up a stucco wall that presents efflorescence?

I have determined the source of the water and I would like to believe that I stopped that with a temporary fix (a large tarp that will cover my patio which used to collect water at the base of the ...
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votes
2answers
7k views

Should I staple faced insulation batts to the face of the stud or the side?

I'm preparing to drywall my attached garage and have run into conflicting opinions on if I should staple the insulation flanges to the sides of the stud or the face. I live in the San Francisco bay ...
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votes
1answer
212 views

Should I insulate my attic with a hot or cold roof?

I'm turning my 3rd floor attic into a usable space. It's a hip roof, 25' x 23', with one dormer. We just had new asphalt singles put on it and it was about 12 foot of ridge vent on the dormer / peak....
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1answer
322 views

Insulating and reducing boominess of plywood subfloor

I have a plywood subfloor in a ground floor extension that is laid directly on the joists. The current floor is half solid wood tongue-and-groove laid on top of green fibre underlay and half fake tile-...
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0answers
50 views

How should I insulate my bathroom wall?

I just gutted my bathroom. I want to replace the insulation in the walls. Right now there is fiberglass insulation with a plastic vapor barrier. Behind that is a old cardboard like material that they ...
10
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2answers
4k views

Mold remediation in crawlspace

Just bought a 25 year old home that has improperly installed insulation in the crawlspace. The insulation is fiberglass rolls with a paper backing, and is installed with the paper facing down, toward ...