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.

234 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3 votes
2 answers
49 views

Do I need to add Mapei Mapelastic AquaDefence over the plywood or over the hardiebacker?

Do I need to add Mapei Mapelastic AquaDefence over the plywood or over the hardiebacker or none? I’m installing the flooring tiles in the laundry room. I am going to have hardiebacker screwed to ...
user avatar
  • 31
3 votes
0 answers
372 views

What could cause moisture on my bonus room floor?

Last week during a cold snap with high winds. I discovered moisture along the floor on one side of my bonus room, above the attached garage. Their was enough moisture that the baseboard molding ...
user avatar
  • 31
3 votes
1 answer
4k views

Getting R38 in roof with 2x8 rafters

I was planning to use foil faced 2" polyiso plus an air gap, plus 5 1/2 rock wool, to get 13+3+23, or r39. But this is all between the rafters below the roof deck, and the polyiso is impermeable. If ...
user avatar
  • 79
2 votes
2 answers
351 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/...
user avatar
2 votes
0 answers
151 views

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 ...
user avatar
2 votes
0 answers
41 views

Adding Extra Insulation to Rim Joist

I'm just beginning a basement finishing project, so I expect this is my first of many posts. Right now I'm wondering about whether it would be worthwhile to add insulation to my rim joists. I live in ...
user avatar
  • 141
2 votes
0 answers
140 views

Dryer duct cleaning: brush picks up insulation

Our dryer is on the 2nd floor, above a garage. It vents into the wall and downward, and comes out about twelve feet above ground at an exterior wall several feet away to the right. I think the duct ...
user avatar
  • 159
2 votes
0 answers
98 views

garage vapor barrier

I am converting my garage into a wood shop and have insulated my walls with faced R13 insulation.The ceilings have faced R13 installed with R30 unfaced additional to the R13. Do I need to install ...
user avatar
2 votes
0 answers
91 views

Insulating slab and vinyl siding

I have a really cold corner of my house in a duplex. Here are some shots from an infrared camera. I hope we can get this fixed without tearing down the siding or ripping out freshly installed kitchen ...
user avatar
2 votes
0 answers
57 views

Installing Radiant Stiff Board Insulation

I'm in the process of renovating a bedroom on the second floor and I have a few boards of silverboard (a Polyisocyanurate Foam Board Insulation) lying around and would like to use. The exterior wall ...
user avatar
2 votes
0 answers
121 views

Transitioning between foam insulation and foam board in basement

In our unfinished basement we had floor to ceiling blanket/roll insulation from the builder. Now that we are finishing it, in order to meet R20, we are removing the bulky blanket insulation and going ...
user avatar
  • 55
2 votes
0 answers
460 views

Insulating cantilever overhang - do I have mortar/stone between joists?

My house was built in 1928, its an old Milwaukee bungalow. I have a small cantilever overhang in the front of my house. That area gets pretty cold in the winter, so I wanted to investigate insulating ...
user avatar
2 votes
2 answers
786 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 ...
user avatar
  • 29
2 votes
0 answers
1k views

Will insulating rim joist without sill plate lead to moister issues?

The house was built in 1930 and besides some bays stuffed with fiberglass the basement is uninsulated and unfinished. After two MN winters in the house I've managed to fill the larger holes but have ...
user avatar
2 votes
0 answers
983 views

How should I seal and insulate a crawlspace to mitigate radon and allow for storage in the space?

Background: I recently bought a house built in 1996. It has a 1480sq ft (approx) living area, which is the same as the crawl space size. The location is in the Kansas City metro area. The yard is ...
user avatar
2 votes
0 answers
750 views

How can I insulate and elevate an A/C line set on a flat rubber roof?

The Scenario An apartment building with a flat black rubber roof. The A/C condenser is on a platform on the roof with an air handler inside the unit. The line set runs across the roof for about 20 ...
user avatar
  • 121
2 votes
0 answers
2k views

How can I insulate brick exterior walls in a 100 year old house with wood beams in brick pocket floor supports

My sister has a 100 year old or older home over a wet and damp crawl space on an island which has high tide and rain water flooding of streets an crawl spaces. A sump pump runs all the time. The home ...
user avatar
  • 251
2 votes
1 answer
160 views

Reducing risks of interior brick wall insulation?

I was surprised to learn that that there are risks with insulating the interior walls in older all-brick houses - particularly in cold climates. This article outlines some of the issues: http://www....
user avatar
2 votes
2 answers
66 views

Basement moisture on foundation issues

After taking all sheet-rock down I noticed that all walls (cement block) siting under ground are moist. Some of them even ate through footers. After farther look at the house I found out that their is ...
user avatar
1 vote
1 answer
67 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 ...
user avatar
  • 11
1 vote
0 answers
41 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....
user avatar
  • 610
1 vote
0 answers
32 views

Should I use PIR or mineral wool (or both) to insulate an interior-ish brick wall?

TL;DR: exposed wall of a brick room in a shed-like roofed structure, what to insulate with? I live in a late 19th century log house in central Russia. It's got an uninsulated extension, as most of ...
user avatar
1 vote
0 answers
86 views

Insulation tape behind a baseboard heater

In the apartment I am in, there is baseboard heater located under the balcony door During the winter cold air come through the wall, and from gaps or crack between the wall and the floor Usually ...
user avatar
  • 59
1 vote
0 answers
94 views

How much garage ventilation is necessary?

The Background I have a 2-car, attached garage with additional shop space. The garage area is roughly 19x21 while the shop space is roughly 12x27 for a total of ~725 sq ft. See the very not to scale ...
user avatar
  • 29.1k
1 vote
0 answers
33 views

Inside insulation of an exterior wall - insulating on tiles

I am working on the insulation of my 100 years old house. A full external insulation was too expensive, so I am doing it on a room by room basis. Now I am planning the bathroom. The current walls are ...
user avatar
  • 460
1 vote
0 answers
50 views

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 ...
user avatar
  • 519
1 vote
0 answers
92 views

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 ...
user avatar
  • 111
1 vote
0 answers
111 views

How to properly insulate PVC water pipes outside?

I live in Houston, and I'm trying to re-insulate my external pipes, which are a mix of PVC pipes and fittings and brass valves. Most of my fellow Houstonians use foam polyethylene insulation and duct ...
user avatar
1 vote
0 answers
29 views

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 ...
user avatar
1 vote
0 answers
129 views

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 ...
user avatar
  • 509
1 vote
0 answers
331 views

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 ...
user avatar
  • 11
1 vote
0 answers
81 views

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 ...
user avatar
  • 1,074
1 vote
0 answers
285 views

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 ...
user avatar
  • 1,218
1 vote
0 answers
54 views

How to insulate a crawl space without an access point

I have a cottage that has recently been completely renovated but later learnt that the floor was not insulated because there isn't an access panel. The cottage doesn't have a crawl space the area ...
user avatar
  • 11
1 vote
0 answers
37 views

How do I design an ice house?

Where can I find how to design a cold room storage building? I have a 12x12 shed that I use as cold storage for tree seedlings for about a month each spring. The present construction is 2x4 walls ...
user avatar
1 vote
0 answers
42 views

Mini loft conversion help (UK)

I have a very small loft (4sqm) that is part of an extension that sits above a utility room between my home and garage. I would like to turn the loft space into a small server closet due to a lack of ...
user avatar
  • 11
1 vote
0 answers
99 views

Is an aluminium radiant barrier allowed to cover insulation paper facing instead of drywall?

First some context: Geographical location: City of Sacramento, CA, USA Building: Residential detached garage. Goal: To keep it cool in the summer and warm in the winter. Approach: kraft paper faced ...
user avatar
1 vote
0 answers
123 views

Best way to insulate knee wall

I have knee walls that have the insulation that is falling down. As you can see in the images below, There is very little access behind the knee wall as there is duct work and cross braces in place ...
user avatar
1 vote
0 answers
39 views

Has anyone used slow rise foam insulation?

Has anyone used slow rise foam insulation? Here is a link: https://sprayfoamkit.com/products/slow-rise-spray-foam/ My house isn’t insulated (older houses in Japan rarely are) and I’d prefer not to ...
user avatar
1 vote
0 answers
80 views

Basement ceiling

I'm finishing my 50 year old basement and need advice regarding the 6'x4' ceiling area (which is actually a cement slab from the front porch). It drops down 2" lower than the rest of the ceiling. The ...
user avatar
1 vote
0 answers
58 views

What to put down under new carpet or "luxury vinyl tile" to prevent cold floors?

We have a hardwood living-dining room floor that was improperly installed (before we arrived), and squeaks and creaks something awful. We plan to rip out the old flooring and put in LVT (luxury vinyl ...
user avatar
1 vote
0 answers
159 views

Fibreglass batt vs rigid foam insulation replacement in attic

Cleaning out attic in older 1954 rancher, original batt insulation badly damaged due to moisture (no leaks, but previous owners replaced roof in the winter) and rodents. Attic is vented via soffit ...
user avatar
  • 111
1 vote
0 answers
77 views

Do I need to insulate my basement?

I am currently finishing my basement and wondering if I need to insulate my basement. I have already framed all the walls. I have a below grade basement and the temp is pretty consistent. Local code ...
user avatar
  • 11
1 vote
0 answers
801 views

Is insulating the back of a PTAC unit for winter a good idea?

The winter heat in my apartment is supplied by old PTAC (Packaged Terminal Air Conditioner) units, using resistance heat (it's too cold for the heat pump to work). A lot of cold outside air leaks ...
user avatar
1 vote
0 answers
574 views

Great Stuff Foam sealed gas pipe, fire safety

So I have a pipe penetration problem at the gas pipe. I hired a contractor and he decided to use great stuff to seal the gap. Would it be a fire safety problem? Thanks,
user avatar
  • 11
1 vote
0 answers
63 views

Air sealing vent baffles in cathedral ceiling

I am reroofing my house. I am taking the opportunity to pull up the decking above the cathedral ceiling and adding air baffles to help cool the roof and reduce ice dams. In order to accomplish this, ...
user avatar
  • 57
1 vote
0 answers
334 views

Is this cloth jacket surrounding my electrical asbestos?

Checked to see what was going on behind the electrical socket, and discovered this fibrous wire insulation. Also, I think who ever installed this 3 prong outlet in the first place did so illegally ...
user avatar
1 vote
0 answers
90 views

The new AC doesn't cool the house down like old unit, what can be the problem?

I had to replace my old HVAC because it was old and had a freon leak. The new unit doesn't cool down the house like the old system. The ac runs all day and it takes hours to get down to 72 degrees and ...
user avatar
  • 125
1 vote
0 answers
44 views

Unfinished basement in Georgia townhome; would vapor barrier on interior trap moisture?

I have a town house that is a middle unit on a slab. The back wall is above grade, with exterior windows and door. The sidewalls abut adjacent units, so there is no wall in contact with soil for the ...
user avatar
  • 603
1 vote
0 answers
30 views

Insulating a steel outbuilding, first major DIY project

My parents just bought a house. My dad, a disabled vet spends most of his time in his workshop. His new workshop is a 700 sq ft steel outbuilding that has no insulation. I have a local AC company ...
user avatar

1
2 3 4 5