I recently bought some gorgeous antique shield-back mahogany dining chairs whose seats need some help. Adding new fabric is no problem (I've done that before.) My concern is the foundation...the seat underneath has an opening with burlap and springs as the support system for the seat. Some of the springs are missing....Should I add a thin piece of plywood to the top of the seat to provide adequate support? If so, how thick should the plywood be? What kind of batting & how thick should it be to make it a comfortable seat? Your help would be greatly appreciated! Thanks,
Debbie
