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Old 08-09-2013, 08:17 AM   #16
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Spray foam around windows/doors


I think you guys are talking about two different things.

Kirk, you are talking about if the cavity gets overfilled and using a demo blade to get inside the cavity to remove material so the jamb/window opening can retract back to normal, right?

and Bill, you are talking about trimming excess foam outside the cavity of the window/door, right?

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Old 08-09-2013, 08:36 AM   #17
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Spray foam around windows/doors


Yeah, I'm talking about excess foam that's protruding out beyond the level plane of the framing. Not trying to dig out into a cavity that's been overfilled with the wrong kind of foam; putting pressure on the window sashes and keeping them from opening smoothly. For that you'd likely want a pretty stiff and aggressive tool.

But I've found saws don't really do a great job of pulling any depth of foam away. For that I found it was better to use a wrecking pry bar to dig it out in chunks. Either the typical 18" size or a smaller one with a cats paw end typically used to get at embedded nails. Tedious but more accurate and less prone to coincidental damage than a recip. saw.
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Old 08-09-2013, 09:57 AM   #18
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Spray foam around windows/doors


Here are some more tips

When using the foam I cover the edges of the window, sheetrock or any trim with painters tape. Take it off only when it is fully set after an hour.

To cut off excess, I prefer just a few easy strokes with a steak knife. Anything larger or without serrations tends to just tear the stuff.

Forget trying to save half used cans by jamming a screw or stick in the nozzle. Just place the nozzle, trigger and top of the can in a ziplock bag with a little acetone. Swish around the parts until completely clean and dry on paper towel. I have been able to use one can half dozen times doing this.
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Old 08-09-2013, 10:03 AM   #19
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Spray foam around windows/doors


Ah, nice tip about the bag and acetone. I'll have to try that next time.
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Old 08-09-2013, 11:55 AM   #20
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Spray foam around windows/doors


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The issues you describe are ones that occur when the wrong foam is used by people who don't know what they're doing.
Ron

Ha. This is me a few years back on my first window install. The slider is tight to this day.
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Old 08-09-2013, 12:49 PM   #21
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Spray foam around windows/doors


If anyone does a fair amount of remodeling, do yourself a favor and get a Hilti foam gun.

The valve is in the metal tip, so you don't have to use the whole can at one time.

For cutting the foam I like a Japanese hand saw...just my preference.
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Old 08-09-2013, 02:48 PM   #22
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Spray foam around windows/doors


DAP makes one that cleans up with soap and water. I've only used it to make a zombie piņata so I don't know how well it insulates.

You could tell which window I started with when I spray foamed our house (once the trim went on, it looked fine). Be sure to follow what the others said about only filling a little and letting the expansion do the rest. Wear gloves, that stuff is sticky, hard to remove from skin and uncomfortable to wear until you outgrow that particular patch of skin. Seriously, I'd rather deal with super glue exploding on my hands. Also, I wish I'd known that tip about using painter's tape. I still have to fix this farkakt piece of work.



Spray foam around windows/doors-image-3007831545.jpg


Don't drink and foam people.
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Old 08-09-2013, 05:13 PM   #23
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Spray foam around windows/doors


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Don't drink and foam people.
No worries. I prefer to foam animals rather than people.
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Old 08-09-2013, 06:41 PM   #24
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Spray foam around windows/doors


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No worries. I prefer to foam animals rather than people.
Hah! Not the worst dropped comma I've seen but that's what I get for hitting send, then editing.
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Old 08-09-2013, 07:12 PM   #25
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Spray foam around windows/doors


yes, in regards to getting the foam out of the cavity in order to draw the window or door back so it operates

as for the water based foam.. i dont trust it.. if the window sweats whats stopping the condensation from breaking down the foam thus losing your insulation in the cavity over time.. as it breaks down it creates more air space allowing more warm moisture laden air in there which can then lead to rot
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Old 08-11-2013, 07:50 PM   #26
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Spray foam around windows/doors


http://books.google.com/books?id=a29...995%29&f=false

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