heated beds

I suspect it’s been done before but I’ll ask anyway

quite commonly heated beds are seen with a cork insulator underneath but also, commonly, without an insulator.

which is better on an enclosed Taz 6?

Any thoughts on using a heated Aluminium (aluminum in usa) bed instead of glass?

I currently use an Aluminum Plate on my print bed. I think i have the 5052 alloy at 3/16" and it’s a 12"x12" square
I live in the US and I got my sheet online somewhere.

Aluminum plates are very nice because they heat and cool a lot faster than glass, and they maintain their heat better.
My sheet came with some defects so it’s a bit warped and I use an auto level probe to compensate for this.