Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [foam]

33 questions
8
votes
3 answers

Spackling drywalls around plumbing pipes

What’s the best way to fix drywall holes ~1-1.5” on each side around pipes coming into the wall under sink. I’ve seen folks foam the holes around pipes, but it looks ugly. I was thinking to patch with spackling patch, but this would most likely…
Tagar
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1 answer

How can I remove foamboard insulation from behind drywall so electrical box tabs have clearance to grab?

I'm planning on adding a lot double-gang old-work boxes to a wall that is made of 2" foam and 1/2" drywall on top of 2x4 studs. The tabs on old-work boxes don't reach far enough to grip the back of the foam, so I need to make some clearance right…
Brandon
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2
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2 answers

Is there any reason *not* to add shipping styrofoam pieces to wall insulation?

My basement walls are covered with a few inches of polyiso foam board with interior stud walls being built over the foam board. I have some extra pieces of foam board from the installation that I am going to add to a couple of the stud bays (a…
susie derkins
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2 answers

Any considerations using spray foam to fill holes in bottom of cabinet where piping comes in?

In the bottom of my sink's cabinet, the piping comes in through generously sized holes. This area is a mouse hot-spot. They come into the cabinet through here, and so as part of my overall rodent control strategy, I am thinking about filling these…
whatsisname
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vote
1 answer

House weather barrier was cut into, and the resulting seams were poorly taped/sealed. How concerning is this?

I recently had some siding installed. This involved cutting into the wall's rigid foam weather barrier in order to install blocking between studs. When they replaced the removed portions of foam weather barrier, they did not tape some of the seams…
MechaX88
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1
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1 answer

basement sill plate insulation replacement?

I’m trying to redo basement insulation, but not sure if what I’m seeing from the original owner was correct to begin with, or up to current standards. Most research I’ve seen talks about rim joist insulation, but doesn’t cover what to do for a…
colej4586
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vote
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Alternatives to spray foam (or Gapotape) around foam board insulation?

I'm doing a cut and cobble insulation job in the roof of a 12'x16' Tuff Shed. The rafters are 2x4 and the spacing of each bay varies because of installation plus warping/twisting. I'm using 2.5" felt-faced polyiso insulation to allow a 1" air gap…
ryanc
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1
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1 answer

In what order should tar paper, rigid foam and Tyvek wrap be installed?

I'm preparing to replace Stucco of my old house with new Jame Hardie siding. After the stucco removed, I'd like to add 1 inch rigid foam to enhance the insulation because of the old 2x4 wall not enough in cold weather. Some saying the DuPont Tyvek…
Yifangt
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1
vote
1 answer

Do exposed foam insulation sheets present a hazard in a bedroom?

Insulation has been installed on my bedroom ceiling with the white foam side showing and the shiny side against the ceiling. Does the exposed foam side pose any dangers?
Sherry Montis
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1
vote
4 answers

What type of fasteners are used for fanfold XPS foam insulation?

I'm trying to figure out what type of staples are pros using for fastening fanfold XPS insulation? Most of the specs mention staples, but not the type, length or what sort of stapler. Fanfold XPS is usually only 1/4" or 3/8" thick.
J. M. Becker
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0 answers

How can I reliably adhere EPS insulation panels to exterior brick?

I’m planning to install external thermal insulation on a brick house using EPS (Expanded Polystyrene) boards. I intend to use polyurethane foam adhesive to attach the EPS, but I’m concerned about the unevenness of the brick wall surface where mortar…
Fortran
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0
votes
0 answers

Plastic or no Plastic? Rigid Foam or None?

Should I use rigid foam boards to insulate the garage roof? There will be a gap between the roof decking and the rigid foam boards to allow for proper airflow. Should spray foam be used on the underside of the roof decking in the garage and also the…
curiousone
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1 answer

Can I use 2" rigid foam between rafters (with an air gap above) and 1/2" rigid applied to the underside of the rafters?

I'm insulating 2x4 rafters in an old house above what will be finished and conditioned space. My roofer is retrofitting in a continuous ridge vent as well as continuous intake vents across the bottom of each side of the roof. Is it ok to use 2"…
Jared F
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0
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1 answer

What would be the best way to clean the edges of this foam spray?

This problem is in 27 basement joist bays. I started using an oscillating tool, but quickly realized I was defeating the purpose of it, as it exposed the gap behind it afterwards. What would be the best way to clean the edges of this foam…
whatisthisthing
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0
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1 answer

Is it possible to water jet or cut/break through an existing underground corrugated drain pipe+foam?

My gutter downspouts connect to an underground corrugated drain pipe which passes underneath a concrete sidewalk. The previous owner had the sidewalk poly-jacked which resulted in the drain pipe being filled with foam (I assume a break in the drain…
bdkowert
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