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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Insulating Ceiling After Skylight Removal

I'm removing 3 skylights from a vaulted ceiling. I'm tired of the leak anxiety and the heat that pours in when it's hot out. I'm hiring someone to do the roof but I'd like to finish off the interior ...
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Is the insulation on my water pipes asbestos? [closed]

I've tried to match this insulation with publicly searchable images of asbestos. It doesn't quite match up, so my hope is that the inspector was right, rather than the plumber. The plumber believes ...
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Can i insulate the extra space in the room

My house has one room that has an extra closet space but this is not insulated. The house has 2 stories and the top is triangular shaped so the rooms have that little bit of space behind the wall, we ...
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Faced Insulation Touching Dryer Vent

Does a dryer vent get hot enough to set faced insulation on fire?
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Does my roof have soffit ventilation and do I need to install baffles prior to blowing in insulation?

Edit: As it turns out, my soffit vents are decorative only. I pried open the soffit in 2 different areas, and there is continuous solid wood behind it. How is the attic getting ventilated then? ...
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Internal sandstone mortar under sash window

Whilst re-decorating a sash window I, perhaps unwisely, removed a wooden board below the window to find exposed mortar (see photo). The mortar is crumbling and flakey. The external walls are sandstone....
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Ordered insert windows that are too large

Problem: 6 months ago, I measured my windows so that I could order insert style windows from a building supply company. I did not know at the time that you are supposed to subtract a half an inch to ...
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Is there more to consider than the R-value when installing stucco in the Southwest?

I live in the Southwest and notice 90% of the homes in my area are stucco. Since I'm considering wrapping the house in an additional layer of insulation, then new siding, I am considering stucco. Many ...
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What's this layer in between OSB sheathing and house wrap?

My house is in Northern California and was built within the last 15 years. I'm pretty sure I still have the original siding, which is hardboard (a.k.a. engineered wood). I've read that house exterior ...
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Partially tile over window

I'm doing a bathroom remodel and want to partially cover and tile over an existing window. Partial, because it's the only source of natural light, and because I live in a townhouse with an HOA, so I'...
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Water heater flue and fresh air intake letting in pests

The heater is in a closet in hallway. The flue is going up into attic. Attic insulation 3 yrs ago filled duct (pink insulation). Placed bug traps in closet, nothing 1st year. Lived in place 7 years ...
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Re-Insulating a Shed with 2x4 Walls [closed]

I am working on re-insulating a shed (350 sq. ft.) that has been used as a workshop. It has T1-11 siding and 2x4 walls. I've taken down all the interior paneling and had electrical updated. Now, to ...
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What is an effective method for reducing heat from a bitumen roll roof?

I have simple bitumen roll roof with additional insulation, no air pocket space, no nothing and heats up a lot in summer. I have been considering either heat reflective paint or installing solar ...
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Solutions to increase roof insulation with raised tie trusses

My house has raised tie trusses: This means that on the second floor the central part of the ceiling is flat, but near the long walls it is slanted. The trusses are 2x6 timber construction, meaning ...
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Rigid foam board vs Tyvek under new siding

We are looking at getting new siding here in zone 5 Iowa. Our house was built in 1979 and has 2x4 walls. I have seen that if we add rigid foam insulation we need to use at a minimum of R-5. Do we need ...
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Insulation under roof deck, no attic space in Arizona climate zone 3

Under roof deck in Bullhead City Az, (Climate Zone 3) can I add owens corning Foamular xps foam board under roof deck? then add fiberglass insulation over that, then drywall. Is there any concerns ...
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How to minimize radiant warming of unfinished uninsulated garage in California summer sun?

We have a 75-year-old attached but unfinished and uninsulated redwood stick-built garage, roughly 20x20 feet. In the unshaded California summer sun, the roof gets quite warm and radiates the heat into ...
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Best way to wire up slim canless downlights in new construction and insulation?

I'm looking at installing thin canless LED lights in our soon to be finished garage. Our garage roof is truss roof and I would like to insulate it before drywalling. So my question has to do with the ...
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Pink rigid board over existing VB and batt insulation?

Replacing drywall on a north interior kitchen wall. I am down the studs, tuck taped the VB over existing pink batts where needed, my questions can I install pink rigid board right over the VB and the ...
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Feasibility of insulation under roof decking and whole-attic insulation with closed cell

So this question is actually two parts. We have a 5 in 12 hip roof (one gable actually) with old corrugated tin on lathe. Everything lies on 2x4 truss rafters. We will be removing everything, ...
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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 ...
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Should I used vapor barrier for floor?

Please consider the following layers, bottom to top, for my small cabin: Large wooden construction beams, raised from the soil (laid horizontally, on top of treated wooden posts) Breathable membrane ...
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Can I use a ground trench as a concrete foundation form?

My city said that for my 2-1/2 story home, the foundation needs a 12 inch wide and 3 feet deep foundation with 3500 psi concrete poured within the mud wall (i.e., no need of foam board). I am planning ...
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Source and type of insulation that's safe for gas range oven wrap replacement?

I have a Kenmore 790.75443411 and they don't have a part number for replacement insulation so it seems I must find some on my own. All I can find that states the dimensions is ceramic fiber that from ...
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Is laminated or triple pane Best choice to replace window pane glass?

Our windows (from 2000s) leak air and we can hear street noise in otherwise quiet neighborhood eg car doors, conversations on sidewalk. We use honeycomb cellular shades as dual purpose to also block ...
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Have I gotten too creative with my attic insulation vs airflow design?

I did a lot of research on air flow and insulation at the beginning of this project, but I started to get into a flow and got a bit creative with foam-board sealed ridge air pocket. My basic design is ...
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Window leaking air, job for a carpenter or a plasterer? (Or me?)

In my bathroom, the window is leaking air: putting my hand at the connection between the window and the ceiling I can feel a breeze of cold air passing through. The window itself is quite old (30 ...
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Can I use my extra attic fiberglass on steam pipes?

I am about to insulate my steam pipes, which are currently exposed. I have a ton of extra attic insulation left over from another project. Can I use this (and some duct tape for shaping) on my steam ...
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6 votes
3 answers
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Insulating a wooden shed to provide strong heat rejection

I'm getting a large new shed built in my garden and I'd like to insulate it to make it a bit more comfortable to work in. The shed comes with stud framework on the walls, so my plan is to use OSB to ...
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1 vote
2 answers
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Heated shed w/ insulation: vapor barrier on inside?

I'm building a shed in Arlington, western Washington state. The shed will contain some infrastructure for a well: a controller, some valves, and a small pressure tank. I want to ensure the well stuff ...
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4 answers
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How can I close this large, uneven gap between wall and ceiling?

How can I seal off this uneven gap between a concrete ceiling with concrete beams under it and a wall perpendicular to the beams? I mainly just need to stop cold air blowing through. There is about a ...
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2 votes
1 answer
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increasing R-value for old vaulted ceiling

I have vaulted ceilings in the main living space. Internally there are 2x6 joists between the roof and the drywall and the insulation I am guessing is original from the 1960's so this section of roof ...
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What is the most important component for the airtightness of a room?

I have looked at the UK building regulations and it says that timberframe cavities should be airtight to a minimum of 0.6 changes. This is for new builds, not renovations which is my case. Looking ...
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Drywall to metal building

I have a metal building that I would like to ac and drywall. The walls are of course metal and double depth tube. My concern is about moisture and dead load to the wall. My original idea is to use ...
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XPS to raise subfloor?

Regarding to my old problem: Tiles above concrete, with electrical conduits I am thinking about using XPS to raise my concrete attic subfloor, so that I can bury existing electrical conduits. Details: ...
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fixing crawlspace insulation, can/should we use r-30 batting meant for attics?

Our kitchen floors (hardwood) are freezing, and we found that crawl space insulation below those floors appear to be poorly installed. First, the insulation appears to be installed upside down, with ...
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sheetrock or is it time for a pro?

I have been remodeling our master bathroom and came to questionable area. I discovered black mold under our large atrium window. All the wood is fine but the concrete sheetrock stuff that was put on ...
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Does a basement bathroom exhaust fan duct need to be insulated?

We have a bathroom in a finished basement. While removing the old bathroom fan I discovered that the duct pipe leading outside is not insulated. Should the bathroom fan duct be insulated traveling ...
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Replacing cedar shake siding and adding insulation

I have old cedar shake siding on a portion of my home, built in the 1950s, and am planning to replace it with a cement siding. Underneath the cedar are nailers, then the open cavity of the wall. In ...
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What is the best way to insulate already existing stud wall against block foundation?

I am doing some remodeling in the bathroom of a bi-level. I removed the wood paneling and found the stud wall directly against the concrete block foundation with batt insulation only in the cavities. ...
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are window unit ACs supposed to let in air when turned off?

I live in an ancient building in a large, old city. I just replaced two decades-old window ACs that came with the place, and the new units let in air. Before I added insulation, when it got cold ...
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4 votes
4 answers
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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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What is the best way to insulate attic walls in a balloon frame house? [closed]

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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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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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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4 votes
2 answers
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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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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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19 votes
7 answers
7k views

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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1 answer
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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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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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