![]() The heat from the sun in the afternoon will easily and quickly cause them to sag under their own weight, they expand and contract a lot with temperature changes, etc., etc., etc. They hold fasteners poorly, but can be glued with some special prep. ![]() It bends with a heat gun very easily, so shaping them in place is fun and fast. Occasionally I use this stuff (PVC) to make faux ribs in glued lapstrake builds. Swap the real wood for the PVC piece and run the same weight/defection test and see where you stand, assuming it doesn't break from this 5 pound test. Now comes to fun part, place a 5 pound weight on the loose end and again measure the distance to the floor. Now clamp a 1x2 of spruce, pine or whatever you have the same length in the same vice and check the difference. Next measure the amount of defection just from its own weight, of course from the loose end to the ground. Try this, get a 48" length of 1x2 of PVC and clamp one end in a vice. Simply put it's barely able to hold it's own weight. No, the PVC planking stuff (and extrusions) from the big box store isn't good for anything except heavy trim replacement, that don't require it to bear any weight or very much heat or even much UV exposure. 3M Sharp Lines Tape Use on walls, trim, tile and glass 21-day clean removal. Btw, whenever i use pvc pipe on boats for non plumbing purposes I sand with 80 grit, wipe down with acetone then spiral wrap with 2" glass tape overlapping by an inch using epoxy or VE and when cured, sand it then bond it in. 3M Original Blue Tape Use on walls, trim, tile and glass 14-day clean removal. It should go without saying that proper prep is required for bonding just like any smooth surface material. Now I havn't explored this but I think they sell various profiles of moldings out of something like this at the big box stores which might be worth a look. Oh, did I say its fairly cheap and we have our local Seeleye Plastics warehouse bring it in for us. I only fairly recently discovered this material while working on my sons boat at Ft Pierce in Florida and they sell Celtec at Fiberglass Supply Depot and had some glassed samples and they were impressive. ![]() A lot of the foam cores we use such as Airex and Divinycell are also PVC. ![]() You can buy PVC plumbing pipe in solid or cellular pvc and it looks the same. By cellular I mean it is foamed with a solid skin. It comes in 4x8 sheets in all the usual thicknesses and bonds well and is about 35lb/ft3 so reasonably light. I'm not sure about the fake wood deck boards but there is a cellular PVC sheet material made by Vycom called Celtec which we use quite a bit of. ![]()
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