How thick of plywood should I use under my queen size mattress? I have a foam mattress and a metal frame that doesn't require a box spring. The platform is made of
![DrawerSolutions 4'6" BUNKIE BED BOARD PANELS 9mm Plywood UNDER MATTRESS-FIRM MATTRESS- (Please check measurements before ordering) PARCELFORCE 48HR TRACKED - SLATS NOT INCLUDED : Amazon.co.uk: Home & Kitchen DrawerSolutions 4'6" BUNKIE BED BOARD PANELS 9mm Plywood UNDER MATTRESS-FIRM MATTRESS- (Please check measurements before ordering) PARCELFORCE 48HR TRACKED - SLATS NOT INCLUDED : Amazon.co.uk: Home & Kitchen](https://images-eu.ssl-images-amazon.com/images/I/91JEKgwoB8L._AC_UL200_SR200,200_.jpg)
DrawerSolutions 4'6" BUNKIE BED BOARD PANELS 9mm Plywood UNDER MATTRESS-FIRM MATTRESS- (Please check measurements before ordering) PARCELFORCE 48HR TRACKED - SLATS NOT INCLUDED : Amazon.co.uk: Home & Kitchen
![wood - Should additional bed slats fit over or around the existing spacer blocks? - Home Improvement Stack Exchange wood - Should additional bed slats fit over or around the existing spacer blocks? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Gi0kJ.jpg)