Function — if you want to build your deck to host future events, you may want to create a different layout than if you were to use it to surround a pool. You can use clamps to keep the posts in position while you fasten them to the deck. Drive roofing nails through the flashing’s top edge every 8 inches. Start by laying out the joist spacing on opposing rim joists. Finally, protect your finished product from the elements by using a deck stain or sealer. If you install composite decking, you can...