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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Does anyone have experience with insulating with waste-wool from shearing?

Does anyone have experience with insulating with waste wool from sheep-shearing. I am interested in washing and deodorizing techniques and also in the packing-density requirements. Plan is to use ...
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23 views

When insulating a new house does the poly have to be caulked and taped at the top?

How far down from the top of the wall does the poly covering the insulation have to be and does it have to be caulked at the top and bottom and taped?
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25 views

Fragile paperback on cellar ceiling batts

Installed in 1968, these insulation batts now fall, or hang. The paperback has become so fragile the insulating weight pulls it apart. What suggestions for a remedy? Replace? Or?
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52 views

Strip on side of window letting cold air in

My apartment bedroom window has a thin vertical strip along the right side that allows warm air from the room to escape. Even with the bedroom thermostat set to 80 degrees, the room hasn't gone above ...
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130 views

Should I install the exhaust hood outlet through the chimney or house wall?

What are the advantages and disadvantages of implementing an outlet of a kitchen exhaust hood through a chimney or directly through the outer wall of the house? There are unused chimneys in the house ...
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37 views

How do we properly insulate a loft ceiling with 2“ by 4” without loosing space?

We have recently started a home improvement project that involved completely redoing all of our vaulted ceilings. We have a loft area that was about 6 foot in height at the peak. When we did the demo ...
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2k views

Why is one bedroom colder than the rest of the house?

I had a home built last year and we have one bedroom that is 6-10 degrees colder than the rest of the rooms in the house when its cold outside. The heat is radiant and the system has temperature ...
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52 views

How can I fill a gap beneath windows?

Outside my house, there is a gap visible below some of my windows. I have attached pictures to make it clear, since I don't know the terminology. The gap is about the width of my thumb. I can see the ...
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1answer
616 views

Do I need vapor barrier to insulate a cinder block garage?

Similar to How to properly insulate a garage? and Do I need a vapor barrier between the insulation and finish wall in a new garage? both of which do not have answers pertitent to my one particular ...
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874 views

What kind of insulation should we put under new tin roof?

We live in an old long leaf pine farmhouse that has no insulation in it. We are going to be putting a new metal roof on the house. The attic of the house was made into living space and so there is ...
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76 views

It is safe to insulate my uninsulated oven?

I have a Hotpoint gas range. I got it because it has no electronics and will probably last until the bombs fall and the ants and cockroaches take over. It is awesome, and cooks my food as well as any ...
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81 views

Vapor barrier for room next to garage?

I'm finishing a room that was built between the house and detached garage. I know I need to put 5/8" drywall for fire protection after insulating the wall. Do I also need vapor barrier? If so, how do ...
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158 views

How should I install underfloor heating over OSB subfloor?

I need some help on my DIY project for underfloor heating system in an apartment. The question is on the screed requirements provided that I have the following (non traditional) setup. There is ...
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210 views

mesh net to help keep crawlspace insulation from sagging

Is it practical to install netting for crawlspace insulation to help keep loose insulation in place? If so how is it fastened to the floor joist and where can I find the netting?
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166 views

What are my insulation options around a shower?

I'm remodeling my bathroom and shower and I'll be replacing the insulation on the external wall. This wall is the "back" of the shower (opposite from where the water supply lines are). With this in ...
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1answer
75 views

Quantitative measurement for sound dampening methods

I'm planning to finish off my basement. Which type of basement ceiling insulation is most effective at reducing sound transfer between levels, blown in cellulose or rock wool batts and how much more ...
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65 views

When to use EPS instead of XPS (aka Styrodur [TM] and Styropor [TM]) for insulation?

What are the pros and cons of expanded polystyrene foam (EPS) (known as BASF Trademark Styropor) and extruded polystyrene foam (XPS) (known as BASF Trademark Styrodur) cards for thermal insulation ...
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1answer
118 views

Add blown in insulation by hand

I have a few small areas in my attic that don't have sufficient insulation. The insulation already in place is blown-in. How practical is it to fluff up blow-in insulation and deposit it by hand in ...
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178 views

What to do first in a house with poor thermal performance and high energy bills

I just moved into a house and am a little bit disappointed in its thermal performance so far. It's winter and cold outside, and the furnace heats the house up pretty quickly, but then the house gets ...
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74 views

Covering insulation in the garage

In my garage, the owners put insulation between the studs to insulate, but didn't cover one of the walls with sheet rock. It's just a wall of insulation that is starting to fall out. Can I put ...
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50 views

How to insulate slab that's been extended?

I bought a house built on a concrete slab on grade. It's an older house, so no part of the slab was insulated. At some point in the past, previous owners decided to pour concrete around the entire ...
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1answer
112 views

Will adding blown-in insulation to my floor cause a moisture problem?

I have a bedroom above my garage. The builder insulated the floor with R13 kraft faced insulation, leaving an un-insulated space in the floor. I was thinking of blowing insulation in the empty space ...
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404 views

Can you remove a tin roof and install insulation and re-attach the tin roof?

Hello from Hobart Tasmania. I have purchased 1930's weatherboard cottage with a tin roof. The roof is insulated in the main part of the house (i.e., in the attic) but the additions on the house are ...
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97 views

Will blown in insulation help in this situation?

I'm in the process of renovation of a 1945 house. Originally built with a flat roof, tar and gravel. At some point a gable roof was constructed over the original flat roof. Space between the ceilings ...
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285 views

Heating issues with slab foundation 50 year old home

I put a new furnace in (97% efficiency) because this home is so cold on the floors that my feet are cold anywhere I walk. Now have heat vents in ceiling but not helping any. Always cold, especially ...
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746 views

How should I fix incomplete insulation on a skylight shaft?

I recently bought a house and am looking at doing improvements and repairs, but unfortunately I don't have a lot of experience or knowledge in such things. We had a home inspector look over the place ...
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3answers
3k views

Can the blanket Insulation in my basement be left in place when refinishing?

I'm thinking about finishing my basement. It currently has the blanket insulation that the builder installed when we built the house last year. I'm unfamiliar with this product. Is it meant to be used ...
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144 views

How do I cover the attic rafter bays after installing baffles from the soffit before replacing the siding?

Should I be covering exposed fiberglass batts I stuffed into rafter bays below stapled in plastic baffles with an air barrier, such as with foil faced rigid foam board or house wrap, before replacing ...
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627 views

Should I insulate the exterior foundation wall above grade or insulate the interior basement wall?

An existing basement wall is not insulated on either side. Humidity inside is causing significant sweating on the cold wall in the winter months. Outside, the top 4 feet of wall are exposed above the ...
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1answer
81 views

What type and rating of insulation should be used in a basement bathroom?

I need to replace the insulation on the back and side of the bathtub. The walls face the exterior of the house (poured foundation). What type and rating should I use? I can't tell what the ...
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182 views

Can I insulate over 1/2 in. styrofoam?

We have a rec room (basement) from the 60's that we are redoing. Currently on the outside walls, they have 1 x 2 studding then 1/2 inch white styrofoam then vapour barrier. WE are wondering if we ...
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126 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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243 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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261 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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472 views

Installation of Polystyrene External Wall Insulation - over old render?

I am considering installing a Polystyrene-block based External Wall Insulation system. Currently the house is blockwork with a rough render. One contractor has told be that the existing render on ...
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486 views

PIR/PUR laminated panels…sources? Similar products? (Interior insulated panels)

We have a 1/2 story that was cheaply finished prior to us moving in. Looking into it, it looks like we have 4-5" of fiberglass bat insulation in the ceiling which is, if we're lucky, something like ...
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1answer
2k views

How do I avoid condensation issues with an insulated garage roof?

Yesterday it was raining (slight overexaggeration of course) :-) inside my garage... Hood of the car was covered with nasty orange water spots. It's an attached garage. There's no garage "ceiling" ...
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94 views

Insulating near a breaker box

Hello: In remodeling my basement I have so far finished installing R-10 2" XPS insulation against my block walls. My question is: How close or how far away from the circuit breaker panel can I place ...
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91 views

Can rigid foam board have an air space between it and rim joist?

I am insulating my rim joists with 2" rigid foam board. Most of the rim joist is bare, and the foam fits along it nicely. Some sill boxes have some small irregularities (vent pipes, plumbing, etc) ...
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38 views

How do I dry up a stucco wall that presents efflorescence?

I have determined the source of the water and I would like to believe that I stopped that with a temporary fix (a large tarp that will cover my patio which used to collect water at the base of the ...
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45 views

How can I insulate an already converted attic space?

A couple of years ago we had our attic converted to a spare bedroom, It became obvious after the first winter that there was a problem, after inspection it was confirmed that there is no insulation ...
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226 views

Can I install insulation over the HVAC duct work and plywood?

Currently there is R19 faced insulation installed between the floor joists. I am adding R30 unfaced perpendicular to the currently installed R19. I have two questions: 1) There is an HVAC unit in ...
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97 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 ...
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53 views

How do I attach windows to a block wall covered with rigid foam insulation?

I'm wrapping a block wall house with rigid foam insulation. I plan on liquid nailing it directly to the exterior block wall of the house. I plan on attaching furring strips with tapcons on top of the ...
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61 views

Insulating a thin-walled dormer

When I had my roof redone, we discovered that the nails they were using to put up the plywood base for the new roofing went through the sides of my dormers. Apparently those surfaces are a single ...
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1answer
79 views

Insulating and reducing boominess of plywood subfloor

I have a plywood subfloor in a ground floor extension that is laid directly on the joists. The current floor is half solid wood tongue-and-groove laid on top of green fibre underlay and half fake ...
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70 views

Insulated radiator foil

I'm concerned that the insulation/ cardboard foil that's behind my recessed radiator is asbestos. My house was built in 1960. Does anyone know if they made that stuff with asbestos? Before purchasing ...
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86 views

How can I insulate a combo basement/crawspace?

I live in Louisville, Kentucky, so we have relatively cold winters (nighttime lows consistently below freezing) and relatively hot, humid summers (daytime highs consistently in the muggy 90s). My ...
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54 views

Does this count as a material alteration or repair for code purposes

Ontario Building Code, 2012 Except as provided in Section 3.17. of Division B, Section 9.40. of Division B and Part 11 of Division B, if an existing building is extended or is subject to ...
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How can I secure a metal frame to polyurethane foam?

I have used polyurethane foam to cover a 5 cm (2 inch) horizontal gap between a metal door and the ground. Polyurethane foam , as I know , needs to be covered with cement in order to withstand the ...