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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Air Leaks Where Floor Meets Baseboard

Wondering if anyone had any suggestions to stop air leaks where floor meets baseboard. Is caulking the best way to go? The room with the air leaks has a cold floor anyway as it sits over an non ...
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Best way to add low voltage outlet to wall that has blown in insulation on the other side?

I want to add a wireless AP and plop it on top of the cabinets in my kitchen; thing is the wall I want to add the low voltage outlet to had blown in insulation on the other side. (The ceiling is ...
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Big box Pella vs. Pella Pella

The Pella salesman claims that his replacement windows are better than the Pella replacement windows that are sold at the big box stores. Is that true? I've done my best to ask the windows people at ...
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Need guidance in selecting a storm door

In relation to my previous question, Does a storm door help prevent heat loss?, where I learned that a storm door helps prevent energy loss, because of the air pocket between the two doors, now I am ...
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42 views

Is it safe to stuff some insulation above my electric stove?

I have a coil-style electric stove with a "hood" above it. The hood has a nice light fixture built in. It also has an exhaust fan which I frankly never use. The problem is that there is a gap where ...
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Insulating basement rim joist cavities

I'm trying to figure out the best way to insulate the ceiling corners in my basement. The wood is flat against the foundation of my house, and I can feel cold air coming off of it. There are joists ...
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Windows the big heat loss?

I am planning an addition and trying to compute the insulation design, and it seems like windows are where all the heat is lost. For example, thermal triple paned glass only has an R-value of about 2....
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33 views

Condensation on Skylight

So this is my first winter in my new house and I noticed the skylight on the second floor has a lot of condensation on the inside now that the weather is getting colder. It's an old single pane and ...
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Should I fill the void created by a magnetic strip used to insulate the door on the outside?

I installed this manetic strip for my mother in law, her door is in pretty bad shape but this works fine. She says there is sometimes water condensation on the metal part of it, do I need to do ...
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64 views

Insulating under a bay window

I have a 1929 craftsman house. The dining room has a bay window, original to the house, cantilevered outside the foundation. The floor joists were covered outside on the bottom with tongue & ...
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96 views

Will insulating my attic make a noticeable difference?

I'm renting a house that was never originally intended to be occupied full-time. The house is of a cinder block type construction with no insulation in or on the blocks. The attic has some insulation, ...
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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 ...
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113 views

Gray “Dust” On Pink Insulation in Attic

I was looking in my attic today for the first time; it's been on my list to check up there to make sure nothing looks off (i.e. no water damage, the roof isn't falling apart, etc). One thing I ...
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What to do about gap in bottom of plasterboard wall when fitting floating floor (UK)

I have removed the skirting boards in my new build house, as I am going to fit engineered wood floor via the floating method. The issue I have is that after removing the skirting, I was presented ...
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58 views

Can I bury insulated flex duct in blown insulation in the attic?

I've heard mixed information on this. I am replacing all my old ducting with new r6 flex duct. Continuous runs with no leaks. Some recommend suspending it above the blown cellulose insulation, but I'...
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How can I fasten pink polystyrene wall insulation into a structure?

I got a big polystyrene board from Home Depot (you know, the kind with Pink Panther on it). I want to glue it together with Liquid Nails to make a house for feral cats in my neighborhood. However, ...
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Advice on building a livable cabin floor on a concrete slab [duplicate]

I'm planning to build a 10 x 12 livable cabin based on a shed design. The cabin will rest on an existing concrete slab. Many shed designs recommend building the floor with equally spaced joists. ...
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Can XPS foam support the weight of a bath?

For a design project, we're looking to use XPS foam boards that are 5cm thick (15 cm wide strips) to support the underside of a bath without legs or wall fixtures, but a supportive frame at each end. ...
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Room above garage cold

I have a room over an attached garage which gets much colder than the rest of the rooms. I think there is no insulation in the garage ceiling (I haven’t checked it yet). I saw some suggestions online ...
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33 views

Insulating slab garage door

I have flat slab garage door that I want to insulate. I saw many videos online and they suggest using garage door insulation kits. However in all the videos I saw the garage doors has the groove that ...
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Long clout nails though rigid insulation boards

We are building a cabin with a solid wooden roof (18mm) on which shingles are nailed. An advised method of insulation is to put rigid insulation board on top, then nail the shingles using long clout ...
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Is it ok to insulate external cantilever floor joists with foam board to fix cold floor?

We have very cold floors in the kitchen because the outside air is moving up through the external cantilevered floor. I'd like to insulate it by cutting 2" foam (probably XPS or Polyurethane) and ...
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Insulating an attic ceiling

I am planning to insulate my walk-in attic to turn it into a storage room(closet for the wife), but I am having some issue understanding the process. The ceiling of this attic is at 45 degree. It has ...
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Spray foam insulation against metal roofing

The context of this question is new construction for a small (28' x 32') outbuilding that will be used for commercial purposes. All work will be permitted and inspected (governed by these codes). I am ...
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128 views

Most efficient way to improve my house's heating

I live in the mid-Atlantic in a 100 year old house, and I'm looking for a way to reduce my heating bill. Last winter, I left the thermostat at 68F, and our gas bills were incredibly high, despite ...
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Cleaning the lint or is it insulation from my gas dryer

I'm wanting to clean the lint out of my clothes dryer, I bought an attachment for the main area and hose but I see what I think must be lint inside the back panel as well, if I remove the panel what ...
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Polyiso foam board

I recently obtained several 4”x4x8 sheets of polyiso foam board that is paper kraft faced on both side that was leftover on a job site. Will I have any issues if I insulate the rim joist of my house. ...
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Inaccessible outdoor PEX piping lost its insulation - what to do?

We have an outdoor counter and sink, and a family of squirrels decided that it was a good place to live. Unfortunately they ripped off a good portion of the PEX piping insulation. (Pretty sure it's ...
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95 views

Insulating a garage - from the outside or the inside?

I have a metal garage, which I want to insulate to a level of a well insulated house (if that's possible at all). I live in the are where the coldest it gets is about -15 C (5 F) for a couple of weeks,...
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47 views

What is the standard way to secure flex duct in an attic?

I was in a house and noticed that flex duct (or what I think is flex duct) is being secured via a strap that's looped around the duct and then nailed to an attic truss (see picture below). Is this the ...
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152 views

Remove plywood floor before insulating attic?

My 1940 house's upstairs ceiling is composed of: 1/2" of plaster 1/2" of solid paper backing 2x6" joists spaced 16" apart (2" rolled batt and 4" open-faced batt insulation) 1/2 inch plywood Open ...
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29 views

Insulating or air sealing around pipes in brick

I recently moved into a single story double masonry house and discovered a rather noticeable amount of cold air coming from around the dishwasher in the kitchen. I pulled out the machine and found ...
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Does rigid foam in siding provide meet the requirement to provide continuous insulation (CI) (R-Value) for walls made with 2x4s

I have a new home where the walls are framed with 2x4s and are insulated with batt. This provides at most R-13 in theory, while current code requires either R-20 or R-13+5 (R-5 from continuous ...
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Gas Fireplace how to insulate for constant draft

We have a gas fireplace that the contractor did not insulate and causes a constant breeze through the bottom vent. Would it be safe to line the bottom walls with mineral wool? The air is ...
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How can I improve my crawlspace's heating efficiency in the winter?

Home is located in NE Pennsylvania. Some details: Crawlspace Runs entirety of the home's footprint (~1000sqft) Approximately 5' high 1/2 (2.5') Below grade Vapor barrier on the floor, sump pump ...
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87 views

Are bricks better insulator than vinyl?

I’m thinking of building a new home 2500 sqft, and my budget doesn’t allow for luxury build however I want to invest on where its really worth and going to provide value to home. Could you please ...
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Spray foam vs injection in garage ceiling with bedrooms above?

My new home has 2 bedrooms and a bathroom over the garage. Per the builder, there is a R30 insulation (so I guess about 9" batt, but haven't drilled in yet to check). This is clearly not working as ...
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Another Crawl Space Encapsulation Question

I recently encapsulated the crawl space under a 12'x14' "sun room" addition to our home. We are in SE Ohio. The room was initially built as a 3 season room, not heated or cooled and had jalousie ...
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How to insulate exterior walls with electrical wiring

As part of renovations to our home we chose to replace existing aluminium electrical wiring with Copper wiring. We also wanted to replace the original R7 insulation with something better (R14 or 15) ...
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how to use 2 inch foam insulation

Cabin has EDPM roof, real 2x4 rafters in the one room. I have slabbed on 2x2 to the rafters in the room, inside, to make a 6 inch cavity. This is an accommodation for poor contractor work shoving 6 ...
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54 views

Insulating small area in attic-like space

I recently moved into (am renting) a new place and have set up a desk in an attic like space. It's overall not an ideal setup but I have limited financial resources. The issue I am facing right now is ...
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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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58 views

Is it ok to enhance pipe insulation with fiberglass batts?

I have hot water baseboard pipes running along the inside of the knee wall attic behind my second floor bedrooms. They are covered with old pipe foam sleeves. The knee wall is insulated as a ...
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76 views

What is an acceptable temperature difference for rooms over garage vs not over garage in a new home?

I recently moved into a new construction home where there are rooms above the garage. I've read several articles about how you can add insulation, but I am trying to figure out what I should ...
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Old home, is this asbestos in the attic?

House was built in the 40s and moved in the 70s, no idea if it was reinsulated or not after being moved
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104 views

Alternatives to wool pile weatherstripping for an aluminum frame door

The wool pile weatherstripping in my patio door frame is disintegrating. The bristles are just falling off on contact. Parts of of it (most likely a section that deteriorated early) had previously ...
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Is it OK to install insulation, with a vapor barrier, before a moisture barrier is applied to a home's OSB sheathing?

Is it acceptable to install insulation, with a vapor barrier, before a moisture barrier is applied to a house's OSB sheathing?
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What is this white sheet behind the insulation?

Was in a house this weekend with a little bit of insulation. Behind it was a white sheet that i haven’t seen before. Is it a vapor barrier?
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When can insulation against external walls be done for new construction?

Picture a new construction house where wood framing is complete and a roof has been added. How soon can insulation against external walls be added? Are there other steps that must be completed prior ...
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Potentially asbestos?

So we're doing a tear-out of the second half of our kitchen, and we came across some old batt insulation in the wall chases from the forty eight company(one of the companies sued out of business from ...