Show Make Plywood Strong Because the grain of each ply Is at right angles to the one above and bel below w plywood does not shrink or orswell orswell swell like ordinary boards Lightweight Lightweight Light Light- C weight walls made of plywood glued to framework are many times stronger by government tests than conventional heavy walls There are two types of ot fir plywood One is exterior exterior exterior ex ex- waterproof type used for boats siding of ot buildings and homes and other outdoor uses The other Is for interior walls cabinets and various various various va va- rious inside applications |