3 PVC Cover Structures to Protect Your Property Before Winter Watch out EL NINO! Every fall brings the same list: winterize the boat, get the car out of the weather, protect the garden beds, cover the firewood. PVC pipe is the fastest and most affordable way to build functional cover structures for all of these — and because furniture-grade fittings don't glue permanently, you can disassemble them in spring and store them flat. Here are three builds that address the most comm