Originally Posted by
Onebyone
You need a heat/moisture barrier of some kind added, like the silver heat resistant fabric, or the plywood will warp. Seen it happen to many a nice wood ironing surface. I like duck canvas to cover whatever padding I use. I make a muslin easy off top covering over that so it's easy to replace or wash. I now use a portable wool pressing pad on top.
agree that you need a water-resistant layer. I cover mine base thoroughly with aluminum foil - inexpensive and works fine.