Post by oasisrebuild on Mar 2, 2020 19:31:21 GMT -8
I am rebuilding a 63 Oasis and the entire back end needs to be rebuilt. Has anyone ever thought to use composite decking for making the curbing/edging rear curve? Its bendable and holds a screw. Curious at least...
With the SmartDeck, we found that without surface preparation, the epoxy adhesion failed (at the interface), not the substrate. The surface was fairly smooth and just didn’t have enough “tooth” for the epoxy to grab on to. When the surface was sanded or flame treated (see below), the adhesion increased as much as 25%.
Flame treating a plastic surface for bonding
To flame treat a plastic surface, hold a propane torch flame about 4″ to 6″ from the plastic (with the tip of the flame just above the surface) and move it across the surface at a rate of 2 or 3 inches per second overlapping the previous pass slightly. Keep the torch moving and only allow the exhaust gases to hit the surface. If done correctly, the surface will not discolor or burn in any obvious way. This technique oxidizes the surface and improves adhesion. For best adhesion, bond to the surface within 30 minutes of treatment.
I wouldn't do it, but that's my 2 cents. Composite decking is designed to be screwed to other structural material, (think wood joists) and not have something screwed to it. It may accept a screw, but I feel it will loosen as the plastic material fractures over time.
Post by wisconsinjoe on Mar 28, 2020 12:03:04 GMT -8
I think I agree that wood will hold screws better. I'm thinking of making a steam bending machine inexpensively from PVC pipe, a portable clothes steamer, and some duct tape. Then just clamp wood onto a bending form. Not done it before, but have seen lots of folks do this.
Composite is floppy, expensive, and weighs an absolute ton. There's no upside at all.
If you're worried about flexibility, just crosscut strips of exterior 1/4" ply and laminate them together with a bit of Titebond III and a handful of self-countersinking screws. Fast, strong, light, and cheap.