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Questions tagged [spray-foam]

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6
votes
2answers
141 views

Why don't conduit fill rules apply to cables encased in closed-cell foam?

I have a question that is more theoretical in nature. I know that when you have 14/2 cable and put it in a 1/2 conduit you are above fill (or just at max fill). The NEC cites that this is in part due ...
0
votes
0answers
57 views

Open cell spray foam off gassing 2 years later. How to fix?

My home was built in 2017 and has Accella open cell spray foam in the unvented attic. In spring & summer 2018 we noticed a mild chemical smell coming from the attic on hot and/or humid days. It ...
0
votes
0answers
31 views

Cut XPS and Spray Can Foam or Spray Foam Kit for Rim Joists?

I am looking into two methods of insulating my rim joist space in the basement on a house in Zone 5. I realize that spray foam kits are the cat's meow in air sealing and possibly ease of use - but ...
1
vote
1answer
32 views

Ceiling material to use on cold joists

Finishing off our large attic space and we went with 3" of closed-cell spray foam (hot roof application) on the slanted ceilings. My concern is heat transfer through the joists. We live in MN and ...
2
votes
5answers
540 views

What foam is best for sealing radiator pipes in floor to prevent mice from getting in?

Is there a specific foam recommended for radiator pipes coming up through the floor?
0
votes
1answer
53 views

Old dryer vent in concrete

We have an old dryer vent that is no longer in use, but is still on the outside of the house. Due to some regrading, the vent is now below the ground line (but boxed off). This causes obvious ...
1
vote
1answer
155 views

What type of foam to fill this pipe hole?

There is a strong smell that comes from underneath my kitchen sink. All the wood is brand new so I guess it's coming from the hole in the ground in the picture. I have seen different types of spray ...
0
votes
1answer
996 views

Remove expansion foam residue

After closing a gap in my kitchen using expansion foam I got residue left on my cupboard. I have tried rinsing it off with water and mineral turpentine but no luck! I'm hesitant scraping it off with ...
1
vote
1answer
335 views

Should I use urethane spray foam or foam rope for caulking wide gaps?

The gaps are irregular around window frame, but the widest are no than half inch (1.3cm) and the frame is flexible metal because the window is uPVC. I can use backer foam that's half inch wide and ...
1
vote
1answer
586 views

Best way to seal a funky gap on shower door frame

I am trying to fix a gap at the shower door frame which I think resutled from previous owner's improper installation/sealing. As you can see, there is this little gap at the shower door frame. That ...
0
votes
1answer
57 views

How would you plug this old weeping drain hole, in a brick/concrete retaining wall

This little sunken porch area stays dry, mostly. There's what looks like an old relief drain in the wall that lets water in. Its kinda dirty in there, and very uneven. Is there any hope in sealing ...
7
votes
2answers
647 views

Why would you ever choose open-cell spray foam?

I've been researching spray foam for the attic in my Maryland house built in 1901. Currently it's a vented attic, and we've decided to spray foam the bottom of the roof deck, turning the attic into ...
1
vote
1answer
232 views

Considering replacing blown cellulose on attic floor with open cell spray foam. Should I just leave well enough alone?

EDIT WITH NEW COMMENTS/QUESTION: Begin edit/ Ok...a few thoughts based on your replies: 1) I totally agree that the insulation guy is selling something. Roger that. At the same time, the GC I've ...
0
votes
1answer
59 views

spray foam in an unvented space?

On recommendation, we just put spray foam in an un-vented attic crawl space above a porch-style addition to an old home -- we sprayed the L (bottom and side-wall, not the underside of roof). The ...
1
vote
1answer
303 views

Window and door spray foam a good solution for this exterior section underneath a window?

I have an area underneath an egress window in the basement where the caulking has shrunk and the bare wood is exposed (see pictures below). I thought about backer rod and caulking the top and bottom, ...
1
vote
1answer
630 views

How much closed cell expanding foam insulation do I need?

I am considering insulating my van using closed cell expanding foam cans. The product I like the look of and reviews is Soudafoam B2 Gun Grade 750ml Can. Is 50mm all round, good enough to keep me ...
1
vote
2answers
96 views

Insulation options for roof, looking into spray foam or batting

I have a house built in 1955, it's a ranch. I'm in New York. The attic insulation appears to be pretty sparse. There are floorboards on the floor of the attic, it appears there is some pink fiberglass ...
1
vote
2answers
657 views

Sealing porous basement common-wall for smells

Our unfinished basement shares an extremely porous cinder block wall with our attached neighbor. Because it is porous, smells transfer readily (ex cigarette smoke). How can we seal this wall without ...
2
votes
1answer
143 views

Can I add insulation on the outside of a bedroom wall adjacent to garage attic?

I have a new construction home, and one of the bedrooms is adjacent to the attic above the garage. The room is always a couple degrees cooler than the other rooms, so was wondering if I could spray ...
6
votes
3answers
4k views

Dried expanding foam on floorboards, how can I remove it?

The girlfriend and I bought an old house and the floorboards are in brilliant condition so we've decided to sand them, stain them, and varnish them. As soon as we took up the carpets we noticed ...
1
vote
2answers
2k views

How to insulate already-existing stud walls along block foundation

My new (to me) house has a 60-year-old block foundation. The previous owners did little to no insulating in the basement. However, they started to finish a bedroom down there, and got as far as ...
2
votes
3answers
1k views

Basement insulation w/ existing tar paper and studs

I recently pulled off old wood paneling in my basement, and would like to insulate it using rigid foam (silverboard or durofoam). Behind the panelling, there is tar paper, and 1x2" studs approximately ...
2
votes
1answer
1k views

Covering sprayed attic insulation with plywood rather than drywall

I have new spray foam insulation between 2x6" rafters, and I would like to cover it directly with plywood (for aesthetic reasons) rather than drywall. Is that an issue with fire barrier code?
1
vote
2answers
3k views

Sheathing with Foam Board and OSB

I have read a number of other articles related to sheathing and the use of rigid foam panels for insulation and was wondering; is it possible to place a 1" to 2" rigid foam panel against the wall ...
1
vote
1answer
3k views

Which foam to use for temporary leak remediation?

I have a leak around a vent pipe in my attic. Unfortunately I cannot get someone out to fix it for several days, and we have a hurricane coming so I can only imagine the rain is going to get worse. ...
2
votes
1answer
560 views

Repair cracks in molded foam in sofa

The structure of my 1960s italian sofa has a medium density foam molded around it. (In the pictures, it's the orange stuff, it's called Bayfit foam). The foam has developed significant cracks (or ...
2
votes
0answers
698 views

Will insulating rim joist without sill plate lead to moister issues?

The house was built in 1930 and besides some bays stuffed with fiberglass the basement is uninsulated and unfinished. After two MN winters in the house I've managed to fill the larger holes but have ...
1
vote
2answers
8k views

Spray Foam Insulation Health Concerns - Alternative Spray Foam Products

I am looking to gather facts (although I am sure there will be a fair amount of opinions) about spray foam insulation and the health concerns associated with the install and everyday living. I mainly ...
0
votes
2answers
774 views

Considerations for spray foam insulation with roof replacement possible in about 10 years

We have an old house in the Philadelphia area which we bought last year. This has a slate roof and we were told by our home inspector that we'd need to consider replacing it in 10 years. It is the ...
3
votes
1answer
512 views

Does 2“ of spray foam mean 2”, or are measurements like with finished lumber?

I just had (and paid for) 2" of spray foam on my crawl space walls. I checked the thickness today and it is rarely 2" thick, usually just under 1.5", and sometimes just 1" thick. Is this normal? Or ...
2
votes
2answers
204 views

spray foam personal protection

I have a closet in the master bedroom of my home that is on an exterior wall. Unfortunately there's no insulation on the back wall of the closet and so a lot of heat escapes. We keep the closet door ...
12
votes
6answers
53k views

Why don't people use rigid or spray foam insulation in attics?

I'm looking to upgrade the insulation in my attic bumping it from an R-6 to R-30 or better, and while looking into things I realized I've never seen anyone use rigid or spray foam insulation in an ...
6
votes
4answers
8k 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 ...
4
votes
1answer
973 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 ...
2
votes
2answers
1k views

Is a thick, unvented hot roof a good candidate for spray foam?

Upon removing some drywall from an unvented hot roof I noticed two serious issues: 1) The roof sheathing is not a taped or sealed ply but a 2x8 T&G 2) There is no vapor barrier and the cavity ...