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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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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Vapor barrier plastic sheathing on wrong side of wall?

I recently torn down some drywall in my garage and noticed the plastic sheathing was on the wall on the garage side (other side of the wall is the family room), when I thought the sheathing should be ...
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Does the inside of a register boot need insulation?

I am talking about the inside of the register boots I have installed three new register boots, all of which had one inch of fiberglass insulation on the sides and top of the inside. Sadly though, the ...
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194 views

What is a good exterior wall composition for a wood frame house with pine chink siding in a moderate climate?

I'm designing a house for myself that will be built in northern Georgia (USA). The climate is moderate, with lows in the 20's during the coldest part of winter. The house will be framed with 2x6's, ...
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4k 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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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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Would insulating copper pipes keep the water cooler?

All of my plumbing runs through copper lines in an accessible attic in a 1960's slab-on-grade ranch style home in Phoenix, AZ where I don't need to tell you how hot the attic can get for a huge chunk ...
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40 views

Sequence of Insulation (attic) and mud/taping

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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995 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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Solutions for a moist basement?

I live close to the water and there is a high water table around my house. Therefore a lot of water vapor passes through the basement walls. I would like to be able to store stuff in my basement and ...
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72 views

Adding “floor” to unfinished attic with blown-in insulation

I'm in the process of converting our attic into a useable storage space. We have no basement and a small garage so it'll have to be our main storage area, so I'm hoping to make it user-friendly and as ...
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129 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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31 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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1answer
86 views

How to ensure electrical wire is safe from nails when using spray foam insulation

So I had closed foam insulation installed after my electrical work is complete and as an after thought, i started questioning how is it that the wire is safe/protected from nails and screws. When ...
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Preparing crawl space for storage

I have a large crawl space under my first floor that I can access from my basement. The ceiling of the crawlspace is insulated with fiberglass (my library/den is above it on the first floor). The ...
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62 views

Insulation worth the cost?

I have a detached garage with no heat/air currently. It’s all brick construction. I will be building a standard stick frame for approximately 1/4 of the overall wall surface area (less the garage door)...
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Repairing Foil Faced Insulation

I removed some wood paneling which was glued to some foil lined insulation. In the process of removing it, some of the foil facing tore off. What’s the right material to replace this with? If it’s ...
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what type of insulation for un conditioned attic

i have a cold attic space that has an interior wall into my living space. What should i have for insulation? I can only access the attic/cold side of the wall. Also, would i use a vapor barrier?
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61 views

Okay to cover attic joists with plywood?

I have long scraps of plywood (1/2 in and 3/4” thick) left over from a recent renovation and since they are my retirement plan, due to price paid,I don’t want to toss them and don't really have a good ...
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1920's Home Attic Insulation Options for warmer summer months (SF Bay Area)

I'm currently trying to install a whole house fan in our 1000sf 1920s home in Oakland, CA. The weather is temperate and Oakland gets 3-4 weeks a year of heat that's 80deg-100deg. With our old house, ...
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Safe to put insulation around recessed light cans after convert to LED?

I have a ranch home, in the kitchen there are recessed lights. I want to replace them with these LED ones that home depot sells: I took a look at the insulation around the recessed light cans from ...
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1answer
73 views

Does effective insulation of concreate block contribute more to energy efficiency in hot weather or cold weather [closed]

I am building a grout filled CMU house in the Ozarks. I have limited funds at this point and so I would like to focus my budget on thermal control where it will be needed most (i.e. heating / cooling)....
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64 views

2x8 insulation in a 2x6 ceiling?

My garage has a vaulted ceiling on 2x6 joists. The main roof of the building is a bit above it and the vaulted ceiling is not covered with any sheeting. I could feasibly put 2x8 batts of insulation in ...
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Should I install vapor barrier over XPS insulation panels?

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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3answers
273 views

Is it okay to insulate some but not all steam pipes coming from boiler?

I have a Slant/Fin boiler with un-insulated pipes in the basement. The previous owners of the house finished part of the basement and covered some of the pipes behind drywall in the ceiling. Is it ...
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1answer
84 views

Is it worth insulating the roof of a detatched, unfinished garage, but not the walls?

My detached, unfinished garage is pretty sucky because the walls are only 6' high. Based on quick and dirty math, it'd make more sense to tear it down and start over than to try and finish it, but I ...
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176 views

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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1answer
74 views

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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1answer
316 views

Insulating and framing a basement after drain system and plastic vapor barrier installed

We had a moisture problem in our basement located in Minnesota. Recently some foundation water came up and ruined our carpet, when we tore out the drywall there was moisture build up and some mold on ...
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1answer
59 views

Replacing the paper on paper faced insulation

I recovered a bunch of unfaced insulation from various places in a building and would like to re-use them, but one would traditionally use paper faced insulation for many of the situations where I am ...
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1answer
51 views

housewrap without removing siding

I'm adding an ADU in an old shop building that is sided with quarter-sawn tongue and groove siding. I really would prefer not to remove the siding, but I would like to seal the gaps between the T&...
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1answer
144 views

Would insulation on my attic walls make it easier to keep my home cool?

I recently moved into the attic and converted it into my bedroom. There was insulation on the floor but none on the walls which made it uncomfortable to live in considering its the summer. I got a ...
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alternate or no Insulation over heat tape

Can I operate a well pump with no pressure tank by using the breaker as a switch? I have about 10 feet of well PE black pipe from the ground in the crawl space to the utility closet (inside heated ...
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Insulation around the pipe outside of a kitchen exhaust

Context I have a kitchen exhaust which works well enough, this question is about insulation. Last winter was quite a cold one for where I live, and I felt a nice fall of cold air coming from there. I ...
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37 views

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
53 views

Which side up on installation of Fesco Foam Insulation?

I’ve got a stack of Manville Fesco Foam insulation boards salvaged from a commercial installation that I’m repurposing for the inside of my garage roof. I’m planning on machining them to fit around ...
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1answer
80 views

How can I insulate a duct running through an unconditioned kneewall space?

Unfortunately, I have to run an 8 inch HVAC duct through an unconditioned kneewall attic in southern Ontario (climate zone 6). I am trying to decide between two options: Encapsulate duct with spray ...
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69 views

What kind of insulation is this?

Trying to identify this type of insulation and maybe some alternatives I can use to replace it with. It looks like foam to me. House was built in 1950s or so:
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1answer
77 views

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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1answer
76 views

Installing insulation board in basement to control moisture

I just had a basement waterproofing job done and it is doing an awesome job relieving pressure and keeping the basement flood-free (we just had a very large amount of rain here in central PA and it ...
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How are attached buildings air sealed together?

I am a condo owner in a building that is structurally independent but abuts directly against another building. As a result the 2 buildings move somewhat as they settle or have changes in temperature. ...
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How could I insulate a thin hot roof and bring it to current Southern CA code?

So we started an exterior remodel today, and found that our roof construction is way more mickey mouse than I thought it was. Our house has vaulted 2nd floor ceilings through most of the 2nd floor ...
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1answer
107 views

Blowing in Wool Insulation

We bought a house in Northern Arctic Minnesota last summer. After outrageous propane consumption this last winter I decided to check out the insulation in the attic. This summer a leak developed and ...
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1answer
119 views

Should I insulate my pizza oven between the firebrick base and concrete?

I am building a pizza oven for my garden. The 'table' will be standard red brick and concrete slabs to form the work top. On top of the work top, I was intending to lay a layer of firebrick, and place ...
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1answer
55 views

A creative Eco-friendly Underlayment for a metal roof? [closed]

I am building an octagonal cabin with a 200 sq ft metal roof (Grandrib 3) at a 30 degree pitch; the roof will sit on wooden strapping and will eventually have insulation below it contained by a ...
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2answers
77 views

Can I remove accumulated sawdust from fiberglass insulation?

I have an unfinished basement with framed and insulated (the yellow fiberglass stuff) walls, but no sheet rock. Over time there has been a lot of accumulation of sawdust on the insulation as the area ...
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2answers
64 views

How to add insulation to ducts in hot uninsulated attic?

I have central air with ducts running through the hot, uninsulated attic (there is blown-in insulation between the joists to insulate the rooms below). Fortunately it's only about 25 feet of ductwork, ...
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41 views

Calculating U Value of a room

I am converting a garage to a usable room and am researching different options when it comes to insulation. I know more insulation is better, however there is a point where adding more insulation ...
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44 views

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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138 views

Insulating basement with interior drainage system

Note that I'ma DIY'er so please go easy on me and please do point on my errors :-) Some time ago I had significant water problems in my basement and had an interior drainage system installed in my ...

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