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A few years ago I built a bed space for an oddly sized mattress I was gifted. That mattress is on it's way out, and I'm looking to replace it with something similar, but I'm having little to no luck finding something that will fit the space. It's increasingly looking like I'll have to buy a twin size mattress and cut it to fit the space. This pretty much limits me to memory foam, which is fine; it'll probably be a step up from what I have now. I've read reports online of folk doing this successfully.
My concern is the fire sock. It looks like you have to bend over backwards to find a foam mattress that doesn't have one. I really don't want to get fiberglass all over my stuff. None of the cut-to-size reports I've read online mention this being an issue, but I know it's an awful one when people puncture the mattress cover unexpectedly. I've never interacted with a fire sock in person (my current mattress doesn't seem to have one), so I have no idea how easily it sheds fiberglass once opened, or whether sewing the cover closed again is sufficient to keep the fibers contained. If I'm gentle with the material, is this something I can do without getting fiberglass everywhere?
Would I be better off just buying appropriately sized foam and just layering it under a mattress topper?
Thanks in advance for any tips or advice!
For thicker pieces you might find you get better results by compressing the foam before cutting it. You could make a simple straight-line clamp out of a couple of 2x4s linked with a door hinge -- just put your foam in between, clamp the open end shut with a C-clamp, and use one edge of the wood as a guide for your cut. For your curved cuts it might make more sense to make a plywood die to match the final shape and press it down by hand or with something heavy before cutting around it.
I used a sharp razor knife on my memory foam. You can make a line and just make long cuts. Do not try to cut through it all at once. Start by making your first cut deep enough that you can follow it through and make a straight cut. Just keep cutting down your line until you are through. Take your time and be careful and you will have a clean cut. Don't use a saw or hot knife you will just ruin your topper.
A razor knife is your best tool for this.
I want to cut my memory foam topper in half (I like it, partner does not) Is there a best tool/method to make the cut fairly smooth instead of jagged?