If you search, you'll mostly find information on protecting treated decking or similar. Let's start with the actual drawing:
So, I'm going to build the countertop with laminated wood beams, which I've used to build an outdoor table before, and it's worked well. However, this bar countertop is a bit more exposed to the elements, so my plan is to sand/brush it and then stain it and then brush it again so it looks a bit "weathered," then apply a protective layer. If I oil it, I'll probably have to keep oiling it over and over again, likely several times per season. What are the lacquer options? The best would be some form of hard wax oil that provides incredibly durable protection, but it's also important that it's flexible and doesn't crack when/if the wood moves.
Another relevant question is the shelving material under the bar. There I’ll be using OSB boards and then painting them white, but is there anything special I should consider there? Type of paint to best protect them?
If you search, you mostly find information about protecting impregnated decking or similar. Let's start with the drawing itself:
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So I'm going to build the countertop with glulam, which I have used to build an outdoor table before and it has worked well. However, this bar top is a bit more exposed to the elements, so my plan is to sand/brush it and then stain it and then brush it again to make it look a bit "worn," then apply a protective layer. If I oil it, I will probably have to keep re-oiling it again and again, probably several times per season. What lacquer options are there? The best would be some form of hardwax oil that creates an incredibly durable protection, but it is also important that it is flexible and doesn't crack when/if the wood moves.
Another relevant question is the sheet material for the shelves under the bar. I will use OSB boards there and then paint them white, but is there something specific I should consider there? Type of paint to protect them in the best way?
My experience with OSB outdoors is - wrong material in the wrong place.
Even if you paint them, which is hard to get right in my experience, they absorb moisture and become shabby and bendy quickly. They also can't handle any significant load, especially not over time, and especially not if moisture comes in (for example from the air or from the bottom of a pan/bowl, etc.) - so they will become "U-shaped" quite quickly, I would think.
OSB is made to be used as cheap sheathing material on walls indoors. I would have used another material, preferably solid wood and not OSB/chipboard.
For the countertop, maybe hardwax will work, I have not tried it outdoors, but on wooden floors, it works excellently: And they are worn/dirtied, scrubbed, etc., and they move.
Nice drawing, I'm actually thinking of building something similar and I've been pondering over the countertops. Initially, I considered building the structure with pressure-treated wood and then casting a countertop, but now I'm leaning towards using natural wood that will be treated instead.
My experience with OSB outside is - wrong material in the wrong place.
Even if you paint them, which is hard to do well in my experience, they absorb moisture and become shabby and flimsy quickly. They also do not handle any significant load, especially not over time, and especially not if moisture is involved (e.g., via the air or at the bottom of a pan/bowl etc) - so they will become "U-shaped" pretty quickly, I would think.
OSB is made to be used as cheap sheet material on indoor walls. I would have used another material, preferably solid wood and not osb/chipboard.
For the countertop, maybe hard wax will work. I haven't tried it outside, but on wooden floors, it works excellently: And they wear/get soiled, get scrubbed, etc., and move around.
OSB may not be ideal, but I thought I'd start with it, maybe I'll have to replace it later on. I think OSB is more dimensionally stable than MDF and maybe even plywood. So I'm mostly looking to seal it as best as I can.
For the countertop, maybe hard wax will work, I haven't tried it outdoors, but on wooden floors it works excellently: And they get worn/dirty, scrubbed, etc., and move around
The question is whether there is a UV-resistant hard wax oil for outdoor use.
The question is whether there is hard wax oil that is UV resistant for outdoor use.
Good question, I don't know that. Generally speaking, UV light is harsh on outdoor surfaces, so the question is if you can avoid treating the surface regularly?
Possibly if you accept a grayish tone and just sand it down if it becomes too rough?
Boiled linseed oil. Oil every other day/every third day for about two weeks. Apply thin layers and wipe off the excess before it becomes sticky. Then it should be enough to apply a new layer each year. However, you have a large horizontal surface, so there will be standing water, but the idea seems to be to have something that looks worn.
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