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Old 03-31-2017, 02:18 PM   #1
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Serreated knife for Foam (Bread knife) 12"

I have cut up to 2" blue foam and i think it works well.

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Old 03-31-2017, 02:33 PM   #2
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I like to use a PVC pipe hand saw or a mitre box saw.
Both are 14-16"s long and help score your line ahead of your cutting and with the mitre box you can use both saws to cut your trim when you get to that point.
If your talking about for softer foam like for seats,cushion type stuff then yeah a long bread knife works good and at one point I had created a hot wire hooked to a good battery to cut some bigger pieces. Stinkier but it made some good clean cuts.
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Old 03-31-2017, 02:40 PM   #3
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I've used an electric carving knife, like you'd use on the Thanksgiving turkey. Worked well for me in 6" foam.
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Old 03-31-2017, 02:51 PM   #4
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I second the el knife.
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Old 03-31-2017, 03:05 PM   #5
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Originally Posted by dan-fox View Post
I've used an electric carving knife, like you'd use on the Thanksgiving turkey. Worked well for me in 6" foam.
Great idea. Looked in the drawer and i don't have one.
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Old 03-31-2017, 03:07 PM   #6
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Great idea. Looked in the drawer and i don't have one.
Goodwill does.
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Old 03-31-2017, 03:27 PM   #7
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3 1/4 Polyiso skill saw
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Old 04-01-2017, 08:50 AM   #8
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Goodwill does.
Will do. thanks
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Old 04-14-2017, 08:16 PM   #9
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http://www.skoolie.net/forums/f10/cu...tml#post196672
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Old 04-14-2017, 08:57 PM   #10
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Are you guys talking about the do-it-yourself kit foam or the commercial insulation foam?
That heavier spray foam isn't coming off with a electric turkey knife or a bread knife. Mine was like cutting wood. I had harsh thoughts for the spray foam guy, especially while I was trimming down the ceiling.

I did it with a pruning saw, an antique 4' crosscut saw and a skinning knife. That was after I chiseled through about two inches of foam to find the ribs. I like the video of the sawzall with the three foot blade for trimming foam.
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Old 04-14-2017, 08:59 PM   #11
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We used the diy kit. Strange that the company you had spray didn't do the trimming. I've never heard of that. 🤷🏻*♂️


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Old 04-14-2017, 10:25 PM   #12
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I've never heard of them trimming the foam around here. I have a feeling he'd have been a lot more careful about how thick he sprayed the foam if he had to trim it. I was going to use the do it yourself kit but the commercial guy was about the same price. Honestly I have no idea if there's any advantage to either kind of foam. I know this commercial insulation foam is dang hard to cut. I'd likely try the kit if I did it again. Actually in the next bus I'll just drive south until it gets warm.
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Old 04-14-2017, 10:29 PM   #13
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Haha good idea. If you do decide to go with a diy kit, stay away from Foam-It-Green. People rave about it but it's because they haven't used anything else. Foam-It-Green has poor expansion, you don't get the board foot you pay for, and they customer service/president Janelle is one of the rudest people we have ever had to deal with.

We had to get another kit after Foam-It-Green pulled their shenanigans. We went with a company called Tiger Foam and it was AMAZING. Incredible expansion, you get the board foot you pay for, and their customer service are nice, friendly, normal people rather than emotional wrecks.

Check them out.


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Old 04-15-2017, 09:03 AM   #14
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I was talking about rigid foam
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Old 04-21-2017, 03:49 PM   #15
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My "electric turkey knife" comment was intended to apply to the sort of foam you make upholstery and mattresses out of. Works well for that application.

I also like the video of the guy with a 3 foot blade on a sawzall, but it looks like it's no faster than doing it by hand. Find a long enough firewood/ bowsaw blade?
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Old 04-21-2017, 08:59 PM   #16
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If you're talking about our video... it's much faster. The blade we used was a hand saw. Garbage on its own. It would bind up after it got a few inches into the foam. Slightly modifying it to fit into a sawzall; it took about 60 seconds per panel to cut. The ceiling panels took about 3 minutes because of having to angle the blade more to stay in the foam since... you know... gravity. Bleck.


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Old 04-21-2017, 10:36 PM   #17
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I think some of us actually have a different type of foam. Mine was like sawing wood. I'd have welcomed a 3' long sawzall compared to my pruning saw.
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Old 05-04-2017, 12:09 PM   #18
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What about using a bow saw blade? $6 from Wally World. Get whatever the closest length to your furring spacing is.


https://www.walmart.com/ip/Great-Nec...&wl14=&veh=sem

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Old 05-04-2017, 12:49 PM   #19
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One guy put one of those long blades on his sawzall, pretty much as a joke at first. It actually worked. Looked a little dangerous but it worked.
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Old 05-04-2017, 12:50 PM   #20
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Serreated knife for Foam (Bread knife) 12"

It was never a joke. We did it with the full intentions of it working. It was great. Similar tools sell for $600.

http://sasquatters.com/electric-foam-saw/
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