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We made the exterior stair threads (3/4") from the pictures out of Cumarú Wood. It looked good for a few weeks... Now, it's showing some cracks at the middle of the boards... I've read the other posts, no need to repeat that...
My question are:
Thanks to all!
I don't see a problem with the photo that includes the pool. The cracks I see in the other photo look like they might be caused by improper drying.
You certainly can't fill the cracks. The only thing to do is to replace the boards. And talk to your supplier/proveedor.
I haven't had this problem with Cumaru.
Thanks so much for replying. Actually, both photos are the same with a 3 month difference.
That wood was sitting on the supplier's warehouse for quite a long time when I bought it. Before deciding to recommend this type of wood, I went thru several web sites (unluckily except woodweb) all of them agreeing it was a good choice.
Those cracks started to appear after maybe 2 months installed. Before that there was no evidence to suspect this was gonna happen...
So, now I'm concerned that if I replace those boards, the same could happen again...
Can you suggest what to look for when selecting new boards??
Thanks again, gracias!
I see that not all the board have checked just the ones with "figured grain". Replace the checked boards with new ones but choose ones with straight grain.
Keep in mind that this wood gets wet and expands then it dries and shrinks. This repeated action will always lead to checking.
Don't you think that expecting (and guaranteeing) exposed exterior wood to never crack, check, shrink, warp or otherwise move in any direction whatsoever, is unrealistic? Wood is wood and if they wanted something engineered and space-age, they should have gone to outer-space because it just doesn't grow anywhere on this planet.
There's a reason why they make wood fillers and dough,.. embrace it or the cracks. Also regularly oil the surfaces since these pool-side-steps are probably not located within the tropical rainforest where your cukaroo tree grew up (the existing cracks may even close-up a bit)
Even old-growth Burmese teak which is naturally saturated with oils and resins, will dry out and check when taken out of Burma.
Or...next time go with composite PVC and leave the Cumaro rainforest standing.