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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862 views

How do I fix air leak in windows?

Our windows in the back of our house receive a lot of wind. When it's windy or very cold, the air is coming in through various crevices: window track and space between window. The windows are about ...
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3answers
11k views

Is super insulating exterior walls with rigid foam board insulation possible?

2" rigid foam-board insulation can have an R-value of up to R-10, layering 4 boards would create a R-40 value, right? However that creates an 8" foam wall above the actual wall. What would be a ...
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3answers
2k views

How do I insulate the ceiling in my crawlspace?

I'm desperately looking for some advice on how to properly insulate the crawl space. I live in eastern Massachusetts where it has recently been in the teens and 20s for low temps in winter. I have a ...
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1answer
259 views

What kind of pipe insulation is appropriate for sun exposure?

I want to insulate a water line outdoors, where it will be exposed to sun. I expect that UV light will damage many foam pipe insulations over time. Is there a type of insulation that will tolerate ...
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5answers
11k views

Are curtains effective for keeping the room warm?

I live in a rented apartment and I am trying to find solutions to keep the heat in. The apartment has several big windows (the 'living room' has one wall that is 80% windows) and I have to run the ...
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0answers
289 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
120 views

Why am I getting condensation on vapour barrier?

I installed some vapour barriers on the windows recently due to it getting a bit cold, but have been noticing that I've been getting a fair bit of condensation on the inside facing part of the ...
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1answer
410 views

What can I do about this gap between the sill/exterior board and the subfloor?

I just discovered that my sill plate and joist setup is different than others I've seen (and I was a Realtor, so I've seen a lot of sills). As you can see from the picture, there's a gap between ...
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2answers
233 views

How to insulate my garage walls using sheathing

My garage is a pole building type with pressed wood walls and exterior siding. I want to put sheathing on the walls for some insulation. The girts that the exterior wall is attached to are 1.5" x 4" ...
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1answer
355 views

How can I insulate an area without an attic above it?

My laundry room and a walk-in closet are freezing cold. They're on the ground floor in part of the house that is single-story. So, there is no attic above them. How do I insulate these areas when ...
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1answer
221 views

How should I insulate behind the last floor joist that runs parallel to the foundation wall?

As an aside, I can't for the life of me figure out what to call the last floor joist that runs parallel to the basement foundation. Does it have a name? In my house, there is a little cramped gap an ...
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1answer
129 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
660 views

Will this moisture problem persist after drywall is installed?

we remodeled a trailer home recently, removed the aluminum siding, put up osb in place of the siding, then used the Lowes brand of house wrap. we installed new vinyl siding over that without using any ...
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2answers
740 views

Should I have cavity wall insulation installed?

I have the option to get cavity wall insulation done for free in my home, but i'm not sure if its a good idea or not. I've heard people say it can cause issues with damp, its hard to get out if ...
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2answers
4k 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
3k views

Is it more effective to insulate the walls, or ceiling of an unheated basement?

We have a new house, well built, spray foam insulation, tight seals. My daughter's room is over an unfinished area of the basement and is COLD this winter. There are vents in the unfinished area, ...
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2answers
309 views

Is a PTHP a HVAC option for a super insulated structure?

Is a Packaged Terminal Heat Pump a good HVAC system for a structure that is super insulated or passively insulated assuming the unit is sized and fitted to meet the needs of the structure. There is ...
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1answer
338 views

How to insulate sloped top of concrete block foundation?

I am planning to insulate the inside of my basement. I have a concrete block foundation. I am planning on going XPS board route, applied directly to wall with foam/tape on all the seams to make it ...
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4answers
2k views

How can I measure the r-value of a wall?

What is a reproducible test to measure the r-value of an exterior wall? Or even a specific spot on a specific wall? It needn't produce an absolutely certain result, but a good estimate with known ...
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3answers
2k views

What options are available for insulating interior walls myself with minimal damage to the wall?

United State | California I'd like to insulate the interior walls in my house using a minimally invasive method. My understanding that is that "blown-in insulation" requires specialized equipment ...
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3answers
4k views

What is a good solution for hiding insulation in an unfinished basement?

First off, let me note that I am a tenant in this house. My landlord lets me do small improvements, but I'm not going to finish the basement with drywall myself. Basically, we have an unfinished ...
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2answers
461 views

What are some cheap (and landlord friendly) ways to fix a drafty flat?

The worst affected seems to be my room. It is the end of the turret with a massive vent (now gaffa-tape sealed) I will be sitting by the wall and actually feel the freezing cold air against my neck ...
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2answers
738 views

How can I insulate the floor of a room above a porch?

I've been searching around for an answer or pointers on this for a while, it's possible I'm using the wrong phrases when searching! I have a UK 1930's built semi-detached house, Streetview pic before ...
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2answers
3k views

What could be causing my bedroom to be so cold, and how can I make it warmer?

I live in a two story townhouse with a basement. This summer, they replaced the furnace and air conditioning unit. Last winter I put 3M film over the windows to help with drafts and it worked great, I ...
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3answers
2k views

Will insulating pipes shorten the time it takes for hot water to reach the faucet?

Ok, so I took a few weekends and totally insulated all hot water pipes I could get access to from the water heater. Now, I still wait approx 90 seconds for hot water to reach the farthest faucet from ...
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1answer
531 views

How do I raise my garage ceiling after spray foaming?

I'm starting to add central vac to my house, which mostly involves pipes in the garage. I cut a hole in the garage ceiling (drywalled) to check things out, and found there's an 18" up to the bottom of ...
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2answers
5k views

What are the differences between hot and cold roof systems?

Can someone explain the differences, pros and cons of a hot roof vs a cold roof? I would like to vault a ceiling in an addition off of our family room, taking the drywall all the way up to the roof ...
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1answer
478 views

Can I use a magnetic air seal on an exterior door?

It occurred to me it may be a good idea to air seal an outdoor door using a similar magnetic seal as refrigerator doors. I can't find this product available today. Maybe because it would make opening ...
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3answers
2k views

How should I insulate a room built into a metal barn?

I'm building a room into our (existing) barn; how should I best go about insulating it? The barn is a Morton building -- pole barn construction, metal siding. It's closed on three sides but open on ...
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1answer
257 views

What specifications should I look at when choosing an exterior door?

I'm considering replacing the front door, and I'd like to know what to look for to get the most insulation. When shopping for doors, I'm not sure what I should be looking at to determine which doors ...
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2answers
669 views

Is dirty batt insulation on attic floor a sign of air leakage?

My attic is 530 sqft, with soffits, ridge vent and some 18"X18" window with mesh over it (I cant recall its name). The house was built in 1960 and has batt insulation on the attic floor. The batt ...
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2answers
2k views

What can I do in this vented crawlspace to keep the room above warmer?

I've recently moved to a new home. This home had an addition that was built on top of a Crawlspace that is vented to the outside. Needless to say, the morning after the first cold night made me ...
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1answer
547 views

How to properly seal the transition between basement wall framing and spray-foamed box joists?

We're looking at insulating the box joists of our concrete foundation. We have 2x3" walls framed which are holding batt insulation, which are 3-4" away from the wall (to accommodate a layer of batt ...
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1answer
1k views

How can I insulate my garage?

My sister's garage gets very cold and very hot as it is not currently insulated. She has the heating/ac unit in there as well as a deep freezer. The attic space directly above the garage has no ...
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2answers
3k views

How do I properly insulate an attic ceiling?

I'm considering insulating my attic ceiling using a foam kit. Doing a bit of research tells me that air sealing and proper ventilation are key I live in Long Island NY and currently have about R-19. ...
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1answer
509 views

Are there any DIY polyurethane foam insulation options available?

I recently had a leak (hurricane Sandy) in an "eave"-like space that required the removal of a part of my drywall ceiling. All of the insulation that was above the ceiling was drenched. To replace it, ...
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0answers
272 views

Do I need to add a protective layer to insulation for wall heater?

I am going to install a 4000 watt wall heater to an add on. It is the kind of wall heater that is seated in the wall. i also plan to install insulation in between my wall studs. there will be ...
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6answers
6k 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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3answers
2k views

Is torn kraft paper vapor retarder in the attic a problem?

I'm adding additional insulation in my attic. Unfortunately, I tore the kraft paper vapor barrier of the existing fiberglass insulation in many places while air sealing. Is this a problem? Or is this ...
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1answer
352 views

What is the best way to install insulation batts in an attic?

As far as we can tell, the attic is laid out like so - first is the 2nd floor ceiling, then whatever material is right above that, then the attic joists, then there is plywood nailed to the joists, ...
3
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1answer
624 views

Can I add unfaced insulation on top of faced insulation which is on top of cellulose?

I want to roll out some additional fiberglass insulation in my attic. Currently there is loose cellulose with faced fiberglass batts placed on top of the cellulose. The facing is facing out as in ...
3
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4answers
7k views

What is the best way to insulate a room with glass window for winter?

Winter is approaching and I have heard that some people insulate glass windows and balcony doors during winter to preserve heat. What materials can I use to do this? I am living in a rented apartment, ...
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4answers
2k views

What to do with a cold corner?

I live in an apartment on the 4th floor. My bedroom has the misfortune of being in the very corner of the building - it has two outer walls. On top of that, the corner between these two walls is ...
3
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1answer
2k views

How should I insulate around pipe/cable holes in drywall?

Notice the gaps between the pipes and the drywall in the pictures above? These gaps appear in both the walls and the ceiling, and I feel like in at least one case, I've noticed a difference in air ...
3
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2answers
2k views

Should I cover a skylight well from the inside?

I made the mistake of having a Velux skylight installed in my bedroom. The installation was done by pros, both inside and out, and it has never leaked through 2 hurricanes. The installation was done ...
3
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1answer
592 views

Worthwhile to insulate basement ceiling while remodeling?

I have an existing finished basement where I'm in the process of replacing an severely damaged plaster ceiling with drywall. I've got the entire thing open, and as it's an old house (1925) there is ...
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1answer
436 views

How can I replace ceiling gypsum board and loose fill insulation at the same time?

I lost most of a ceiling panel due to water saturation and collapse. It was removed along with insulation residue and a temporary fiber board panel tacked in in its place. Now I would like to install ...
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2answers
491 views

Is it a good idea to put 1/4" XPS under engineered floors?

We're pulling out the carpet in a room next to a room with hardwood floors. After removing the carpet and putting down the engineered floor, we'll be 1/4" short of the hardwood. Options: Use ...
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3answers
468 views

How do I insulate exterior basement wall?

Working from scratch with a bare wall. What do I do? 3 hardware stores have told me 3 different things. We have very cold winters here. Looking for cheapest and highest R value. contractor next door ...
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5answers
2k views

How can I insulate a basement wall that has 1x1 framing installed on it?

It is freezing in my basement so I decided to re-insulate my daughter's bedroom. I removed the old paneling walls to find that it wasn't insulated! There was a water barrier and a heat shield. My ...