Thread Tools Show Printable Version. Posts They all refer to Ultraply but not Ultraply XL. Maybe the XL is a new product. Has anyone built with it or done any testing of the product such as long term burial or wet exposure? Does nobody have an opinion on this plywood? I use it every time I need to put down a new floor.
Can't be beat. Worked out ok, I coated and faired with epoxy and , then painted with Brightsides, the baby likes it If you building down and dirty low budget, it should be fine. Re: UltraPly XL, any final word. Originally Posted by GJBan.
Re: UltraPly XL, any final word That is why I have started a protocol of boiling drying and freezing the laminate to see what happens. Unfortunately I do not have a control such as some marine plywood to run side by side.
I will also start some burial tests for rot and durability. The availability is what makes this product attractive and if it is good for small boats then so much the better.
So many people are caught up in "doing it the right way" in that they never get anything done. When I was a kid long ago my father and I built boats up to 23 feet out of AB-AC exterior and hot dipped galvanized screws. They were fine boats with NO problems. After about 10 years or more we gave them away or sold them and lost track of them. Good wood is getting hard to fine and soon only the rich will have them. Experimenting with new materials is a must and it is us builders that have to do it the best way we can.
Fear of failure is what stops progress. If your going to throw good money down on quality plans for a good design, then use substandard material to build the hull, thats a risk I have trouble with.
Originally Posted by Mike Vogdes. I suppose it depends on what your building Re: UltraPly XL, any final word Sounds like there is quite a mix of woods in the material, not always the same, and that the exterior 'plies' are more like very thin veneers.
Its a "poor mans planking" and he understands its not certified nor recommended for marine use. Re: UltraPly XL, any final word In one of those links, someone says: "Its hardly "5" ply as we would consider the faces not plys in terms of their thickness. The faces are less than 1mm and will not provide any real benefit over three ply. I have some, but it's up North at the moment and I never thought to measure the plies. The boat is now three years old and only made it into the water its first summer, has been stored upside down on sawhorses in the weather the rest of the time.
It has been unused because I broke the leeboard and never got the sail right, and I'm useless about finishing projects. Sometime last summer I got to picking at some of the delaminating luan so it is more of a wasp haven than a boat right now anyway.
The luan is mostly delaminating but the Ultraply appears to be fine. It was painted outside with oil based floor painted, inside with whatever leftover paint I had at the time. No epoxy or anything. The inside is yellow so I can see stains and such there.
It looks like there is also some rot black areas finding its way into the luan but again no so in the Ultraply. I also built a one sheet thing out of Ultraply for gits and shiggles. It is only painted on the outside, nothing inside. It has been stored propped against the wall in carport but water puddles under it whenever it rains. There is a bit of delamination where it sits in the water.
Take this as you will, I plan on using Ultraply when I build my Laguna, but part of why I decided to build the Laguna is because its a relatively quick build so I don't have to feel as bad about going cheap on materials. I will repeat these cycles until I get bad results or am sick of running the test. I am now building a dory while I restore my Chris Craft 36'. The traditional bottom of the dory is white pine with plenty of tight knots.
Can you imagine the outcry if this wood was never used for the bottom before and I had suggested it! I am more wary of the white pine bottom than the Ultraply XL sides that I will use. Remember in your posts; there is Ultraply and Ultraply XL. Join Date Mar Location central cal Posts 23, Hannu's "Dug", made with drywall tape and bondo. I cannot overemphasize the horrible quality of this ply, yet the boat remains.
I paddle it about a bit, loan it to whoever, and the rest of the time it sits. No rot, no delamination, no joint failure. As for the white pine, people used to build boats out of what was available locally, before the sent away for better stuff from somewhere else. Join Date Dec Location on-the-cuyahoga Posts 13, I used my own checklist to evaluate the stuff It had: three approximately equal veneers waterproof glue a weight identical to okoume I was able to cherrypick some panels that were clear of knots and footballs on the outer veneers.
I inpected the inner veneers by backlighting each panel with a watt spotlight in a dark room. I found a couple of nickel sized voids and filled them with epoxy. The downside: Some panels had exterior football patches on the A side and the epoxy wasn't able to eliminate a little water penetration. The exterior veneers were some kind of white wood maybe birch that would blacken very fast if the epoxy layer was broached.
Each panel was covered with green x's that were the underlayment nailing pattern. And the exterior stuff is difficult to keep looking nice. The panels were only 4 x 4 so a lot of scarfing was involved. Nonetheless, the boats made from this underlayment were very sturdy and not bad looking.
One, a 14' pirogue, sailed off my roofrack and landed in the road. Got scuffed up. Nothing broke. It's still in use ten years later. Because the wood showed such a propensity for entertaining rot I kept both boats finished bright so the beginnings of rot were immediately visible. I keep both boats in my basement in the winter to make sure they are well dried out. Yes, you can build boats with exterior grade plywood. But the quality of our domestically made ply has been going down for the last forty years and exterior fir, which is what most of us have available has a lot of downsides.
Join Date Mar Posts Since this is my first boat and i knew i'd make mistakes, which i did with making the scarf joint the first time Either way i have sawed though this ultraply XL many times and have yet to find a void!! Contact Us! Sign in to see pricing and availability which varies by market. The warmth, beauty, and functionality of wood combined with unique characteristics found in many species make Ultraply boards a remarkable building ma Read More.
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