I’m in the middle of a bathroom remodel and currently have the walls open to studs. I’m trying to insulate the (true) 2×4 walls as much as possible and was leaning toward spraying in foam, but since the Tiger kits are $1/bf, I had a money-saving idea to use a rigid foam board like Thermax, cut the panels to fit between studs in a double layer and then foam the edges with my foam gun to seal for air infiltration. Should get me comparable R-value as sprayed-in foam for less than half the cost and less mess.
Anyone try this before or foresee problems or issues with this approach?
Thanks.
Replies
That is a fine solution for a small area.
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Thats what I did for between my logs, worked like a charm.
Go for it. I got my foam in a big cannister from http://www.farmtek.com but you may be able to get by with smaller disposable cans.
Spheramid Enterprises Architectural Woodworks
"If you want something you've never had, do something you've never done"
I have a Fomo gun and figured I would just cut the panels 1/2" less wide and tall than the bay, then foam the outer edges to air seal everything together. Jon
That'll work. I gotta get me one of them guns, sometimes the big cannister and hose is overkill.Spheramid Enterprises Architectural Woodworks
"If you want something you've never had, do something you've never done"
Where do you get a fomo gun i havent heard of one of them before
Wouldn't this same process work as well in an attic between the rafters w/o the expense of spraying foam ?I have an old house w/no insulation in the attic and i have been thinking about foam but its pricey ,not that heat loss isn't either . Just trying to save a little if I can
Wouldn't this same process work as well in an attic between the rafters
It will, but, you really, really, want to go slither down to the juncture of the rafters and joists to about where you can touch the top plate, then repeat right around the perimeter of the roof space. This is not to bad with a 9/12 or 12/12 roof; significantly less so with a 4/12 roof, though. That wand can reach farther in faster, sometimes.
Getting in behind kneewalls can be interesting, too.
Otherwise, yes, it's a good deal.Occupational hazard of my occupation not being around (sorry Bubba)
Thanks Yes your right I didnt think that thru . I'll l have to see if I could get my wife to do it instead (G ) Just kidding It would work better on a joist rim in the basement
Roy
your right I didnt think that thru
Well, if I can spare another the fun I had inder the (barely) 4/12 hipped gable (that was not but 34" at its highest anyway) fishing rear speaker wires . . .
Funny little wedges of gable walls, the 2/12 "converted" porch, the one bit of hip, the fiddly bits are more of the roff than the flat bits--ain't that always the way?Occupational hazard of my occupation not being around (sorry Bubba)
It's a good solution. You can order 3-1/2" XPS and get a hair over R21. Foam as described.