Sheet: Sheet decking is a single large board crafted from both plywood or oriented strand board (OSB). Plywood turned popular during the nineteen seventies on account of its longevity and toughness, but roofers use OSB far more frequently now as it’s powerful and affordable. Perfect for areas with major snow. https://spencerdhlos.bmswiki.com/4572078/examine_this_report_on_classrooms