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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Is garage door insulation beneficial in South Florida?

I'm in South Florida and I have a west exposed garage door. The garage door is metal (possibly aluminum). The garage is not air conditioned. There is insulation between the house and the garage. There ...
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4answers
5k views

Should I replace my house wrap when re-siding?

My house was built in the 60s and doesn't have normal plywood sheathing. It has that old sheet-rock-like sheathing (it's black, I think it is exterior gypsum). Basically the walls (right now) go, ...
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1answer
47 views

How can i stop heat

I live in a shop with my boyfriend, upstairs like a loft. We put up installations. We have an air conditioner running all day, but the room still gets too hot. No windows, just one huge door. What ...
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3answers
69 views

How can I add thermal mass to my house?

We're part of a real-time pricing program with our electric utility company, and a good strategy for offsetting electricity use during peak demand times is to pre-cool the house. The more thermal ...
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1answer
52 views

Insulation over ceiling drywall nailers or scabs

So fiberglass batts 12" thickness. The goal is to not let the insulation become compacted or have gaps between unconditioned and the conditioned space. When a drywall nailer is fastened to the top ...
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0answers
20 views

Can I install batts under rafters in partially obstructed knee wall space?

I have an unconditioned knee wall space. I wish to condition it but am faced with a small dilemma. My concern is: can I install fiberglass against the rafters (assuming I have baffles), if the ...
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2answers
49 views

Mouse coming through gap around gas pipe

I found some mouse droppings in a cabinet yesterday, I'm not very handy but best I can tell is the following - There is a weep hole outside, which is maybe 1 centimeter wide wide, and it seems the ...
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1answer
17 views

How to prevent moisture from ruining a climate-controlled wooden outbuilding

We are having a 16 x 24 x 8 wooden outbuilding built. We are making a home gym that will have a cooling/heating unit for climate control. We are worried about moisture causing damage. Looking ...
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2answers
40 views

Mold and an insulated shed roof

Thanks in advance for any answers. I have just had a shed installed which is built onto the side of our house. It has a metal roof, with OSB board under it (there are wooden noggins to support it). ...
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1answer
35 views

What to do with cinder block holes made for electrical boxes?

The previous owners (flippers) left a surprise behind the drywall in my basement, and it was not just the absence of insulation. What is the best way to work with these holes? I want to replace the ...
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3answers
36 views

Reversing an inswing door to an outswing door? [duplicate]

I about to tear out and rebuild a portion of an exterior wall in which I will be installing a door, is it possible since it's new construction to purchase and inswing door and convert it to an ...
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0answers
15 views

How to repair exposed exterior foundation insulation?

Thanks for checking this question. New to owning a home, and new to stack exchange. I do not know where to begin and I do not know what "terms" to use when googling. Any tips/ideas how to repair or ...
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2answers
397 views

Can I block a skylight during summer without condensation?

I have a small fixed skylight and figure that during winter it's no problem to block the tunnel at ceiling level as suggested by an answer to a similar diy.stackechange question. (The only difference ...
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2answers
159 views

Is there long-term off-gassing from polyurethane closed-cell spray foam insulation?

We already installed Quadfoam 2.0, a "two-component, 2 lb., closed cell, spray applied, rigid polyurethane foam system" under the roof of our house, between the rafters. We read the manufacturers ...
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2answers
38 views

Is it a good idea to cap fiberglass batts with blown cellulose?

I currently have fiberglass batt insulation of about 6 inches (in some spots less than that closer to 3 inches) due to a cleanout necessitated by rodent activity which has been hopefully remedied. I ...
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1answer
12 views

Skylight insulation preventing heat gain

I have 6 - 4'x8' skylights in my showroom roof. its great for the winter but in the summer it radiates heat and glare into my showroom challenging my AC. I have had shade clothe as a cover which ...
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2answers
128 views

How Do I Insulate My Bathroom Floor?

I'm renovating my bathroom and I need to insulate the floor. It's a concrete slab with 2x4 joists set on one brick piers. The home was built 50 yrs ago. There was no insulation at all in the floor. ...
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1answer
39 views

What is the difference between the coolness of different wall types in hot weather

Given a 30cmx30cm concrete beam and pier structure, with infill, and year-round (equatorial) daily temperatures of around 25C-33C, with around 80% humidity. What is the difference between these ...
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45 views

Creating 1" Air Gap between foundation wall and fiberglass batts

We just bought a house in Calgary, AB, Canada and noticed that the basement is below grade and is insulated with fiberglass batts. There is no drywall at the moment; hence, I have access to the vapor ...
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1answer
42 views

How Much Attic Insulation? (R-value vs Ceiling Bowing)

I'm preparing to insulate my attic and need to know how much is necessary and how much weight the ceiling can support. I live in San Diego (mild/warm climate). The house was built in 1969. ...
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2answers
6k views

How to seal between sill plate and foundation wall with wide gap?

Here is a picture of the top of my uninsulated basement wall. The foundation is poured and from early 1970s. For orientation to the photo: the white in the lower left corner is the vertical face of ...
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1answer
459 views

Should I install drywall or plywood above a drop ceiling to increase the insulation value?

I am currently insulating a new room in my house. I am planning to put up a drop ceiling. I have insulated between my roof trusses. Do I need anything else between my drop ceiling and attic space ...
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1answer
63 views

Attic Insulation

I have Insulated AC flex duct work in my attic. Am I correct in that since its insulated already if I lay insulation over the duct work it is fine as long as the duct work is sealed properly? I have ...
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2answers
413 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
85 views

How to seal the exposed top of glass block windows

My basement has some glass block windows, that seem to be improperly (or not-optimally) installed. See picture.... As I understand it, there should has been a perimeter channel attached to framing, ...
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2answers
320 views

Gap between 6“ dia wall thimble & 6” hvac pipe

I bought a 6" dia aluminum wall thimble to vent my 6" dia hvac steel exhaust pipe through to the outside. However, the diameter of the 6" thimble is actually 6 3/4". How do I effectively insulate the ...
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3answers
90 views

How should I insulate my workshop

I have a 20x14' workshop in my backyard. When I had it build, I had the installer place rigid insulation form under the concrete slab but everything else was not insulated. Since then, I've ...
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1answer
130 views

What is the Source of the Approximate “R Value” Chart?

There is a Chart labeled Approximate "R Value" of Walls, Windows, Ceiling & Floor in one of the responses to the question How can I measure the r-value of a wall? What is the source of this table? ...
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2answers
150 views

Is insulation around a dryer vent hose safe?

I live in an old apartment which does not have laundry, or even laundry hookups. Since I despise laundromats, I took it upon myself to get a portable washer which connects to a sink, and a portable ...
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6answers
2k views

Wind from kitchen sink drainage pipe

We live on a windy coast of North Sea. High wind is a norm here. One of the problems I face with the wind: it comes out from kitchen sink drainage pipe. If it is blowy outside, you can feel a draft ...
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2answers
29 views

Mounting exterior shutters on deeply recessed windows

I want to mount shutters on my 1930's house, but since we've had it insulated with polystyrene, the recess is 7 inches. That would need a huge offset hinge!! The windows are metal-cased woodframed ...
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20 views

Is silica gel used for insulation in walls/floors/ceilings?

Silica gel has great insulating properties (video). Is it used for home insulation? If yes, which products are available?
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7answers
25k views

was in attic for an hour without mask. could this cause issue?

my bathroom fan was dropping water so i went up to the attic and applied fiberglass insulation to the bare metal vent pipt from the fan out to the roof. i was up in the attic for an hour wearing ...
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8answers
15k views

How do I remove blown in attic insulation?

I want to replace the drywall ceiling in my house. It's old and has been painted over a million times. Home was built in the 50s. How do I replace the ceiling without replacing the insulation? Or if I ...
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0answers
23 views

Installing moisture/weather barriers around home/ doors and windows

What is the proper way to installed moisture/weather barrier around doors and windows in southern Louisiana?
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1answer
35 views

Replace insulation in a Trane HVAC? (TWE030C140B0)

I found a little mold on the foil covering the insulation in my TWE030C140B0 air handler/ AC/Heater. I am 95% sure I have the moisture problem resolved and now I need to replace the insulation. Does ...
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55 views

Asbestos? What do you think?

I originally thought so, but now I'm not so sure. Thoughts? It was located around HVAC vents.
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1answer
45 views

Vented soffit under bay window

Background: A bay window has been having ice dam issues for the past couple of years. I think the water is coming in through the space between the gutter and the fascia. That space is just on the ...
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2answers
112 views

Should I bother to flip basement ceiling insulation that's on backwards?

the rolled faced insulation on the ceiling of my unfinshed unheated basement is on backwards(vapor barrier facing down instead of up towards the 1st floor),1st floor is uncovered hardwood. Insulation ...
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3answers
59 views

Water coming from the cistern is not capable of flushing the commode?

Its been months now that our water pressure is not enough to fully flush the commode, every time it must be filled manually or wait until it fills for the second time for a complete flush out.
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1answer
28 views

Should I use faced or unfaced insulation in a utility room area?

I'm trying to keep my unconditioned utility room from being so darn cold and hot during the year, and to keep the condensation line from freezing during the winter. I figured insulating the area ...
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1answer
69 views

Thermal Mass Puzzle I Can't Figure Out

I live in Los Angeles and have 2 units on my property. I use the front one as my office. I had the floors done years ago and thought I would get tile and have a subfloor of cement put in so that I ...
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4answers
14k views

Are there any dangers associated with rigid foam insulation?

Is there any danger of bad fumes/gasses being released from polyisocyanurate or polystyrene rigid foam insulation? I'm planning on insulating my bedroom from the inside (ie: putting the insulation ...
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3answers
43k views

What's the best way to keep my garage from freezing?

I live in Colorado. My 1950s house has a one-car attached garage that was built in the 2000s. The walls that are not shared with the house are not insulated: the studs and sheathing are visible from ...
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2answers
59 views

Can one pane of a double pane window be safely removed?

Recently I asked Is there a way to remove condensation and clean inside a double pane window? The answer appears to be "no", at least not without resorting to very dangerous chemicals. Two of the ...
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3answers
49 views

How to block airflow under an interior door over carpet

I have an air conditioned bedroom. I'd like to prevent heat from entering thru the door. I got door seals for the sides the top of the door, but I can't figure out a good solution for the bottom of ...
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2answers
117 views

What is the proper way to perform work in an attic? (UPDATED)

For an attic with rolled fiberglass insulation, what is the proper way to perform work in the attic? Is it okay to just walk on top of the insulation, stepping where there are beams underneath it? ...
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1answer
28 views

Mending plastic sheeting behind sheetrock

My house was built around 2000, and seems to have plastic sheeting behind the sheetrock (I'm unsure what thickness plastic was used and what type of plastic; is there some sort of standard?) My house ...
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2answers
34 views

Opening in dropped ceiling causes room to get warm

I've moved into a new home last year. One attached room is a workshop with a drop ceiling and it was comfortable at around 70 degrees last summer with the air conditioning. This year, I moved a piece ...
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12answers
36k views

Is there a significant benefit to using plastic window insulation year round?

In order to help save more money and funnel more of those savings to debts, I'm looking for more ways to save money. I've heard that puting plastic window insulation over single-pane windows ...