Heated bed insulation

[AbuMaia]

Is that alumin-ium, or alu-mini-um?

[Roxy]

I have cork on the underside of my heated pad, and two layers of aluminium cooking foil between the heated pad and the glass sheet.

Where can I buy sheets of cork?

[N5QM]

Where can I buy sheets of cork?

I ordered a roll today from Amazon, I expect I might have to cut it and let it flatten out for a while though..

[AbuMaia]

I got a pack from Home Depot. They were too big, so I had to cut it down, but that's better than being too small.

[hernejj]

For those of you using cork, any specific thickness or type? Also, do you find that it works well?

[Roxy]

I'm thinking I would like to try a sheet that is 1/4" think under the bed. Does anybody have suggestions or warnings or sources of material?

[TopJimmyCooks]

I used 1/4" cork that was sold at Lowes as a package of four tiles to use to make a bulletin board. since I'm using the spacer at one corner of the bed that was 1/4", the cork fills the space nicely. you will have to trim out holes for the bed bolts and I also made a V channel in the top of the cork under the pcb, so the cork doesn't put pressure on the thermistor and wires/bow the PCB up in the middle.

[gmay3]

I bought a thin sheet roll of cork from amazon when I was building my printer. I would advise against it, it's too thick when doubled and too thin when only using a single sheet. It also is a pain to work with since it's so curled up. I think multiple flat tiles or one large flat sheet would be a much better approach.

[usarmyaircav]

I am debating on trying to double up my cork as the springs are really wound down tight.