Those $33 sheets are probably fiberglass-reinforced plastic, intended to install for waterproofing, like lining a shower stall or something similar. Unnecessarily heavy and floppy for what you want to do.
Home Depot (at least in my area) carries coroplast, corrugated twin-wall white plastic sheets, for about $13.50 for a 3' x 6' sheet. They also offer a 10-pack of 4x8, but that's $110, available by special order only, and an awful lot more than you need. Maybe you and two ecomodding friends could go in on a pack?
__________________
Lead or follow. Either is fine.
|