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Old 02-20-2010, 07:53 PM   #1
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Treating LVL beam ends


Approximately 1996 I added a roof extension on the back of my home to cover an existing wood deck. We used three (3) LVL beams (sandwiched/bolted) to span an 18 ft. length. Only the very ends of the beams would be exposed to rain. An older painter (RIP) friend of mine put a coating on the beams of something which he stated would "last my life-time". Well, I'm still here, but the ends of the beams seem to be needing a coating of something. There's no rot, no peeling veneer, just discoloration as compared to the non-exposed part of the beams. the beams only changed coloring slightly. The ends are now darker where rain has hit them. I'm thinking of cleaning the exposed parts of the beam(s) with maybe TSP, allow to dry good and re-coat with something really good. Suggestions please, David

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Old 02-21-2010, 02:23 AM   #2
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Treating LVL beam ends


I'd first go to an oil based primer. Both zinsser and kilz have formulations for exterior, problem woods.

I would also consider covering it with flashing and/or trim?

You could try calling tech support at GP or Weyerhauser, although I think they will tell you that plain old LVL is not meant to be exposed like that.

Please do post your solution.

Thanks.

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Old 02-21-2010, 09:04 AM   #3
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Treating LVL beam ends


YES, I did/do know regular LVL should not be exposed. At the time of the project, no one near here sold LVL beams, and a friend who operates a truss business ordered them for me. To have them pressure treated at that time would put the cost of each beam at $600+. Flashing on the exposed ends is definitely an option. Cutting the bottom corner of each end on a 45 is an option-less material exposed. The oil-based primer could be an option--I don't really want to change the somewhat natural wood look. Thanks, David
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Old 02-21-2010, 12:11 PM   #4
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Treating LVL beam ends


Then maybe a marine grade wood sealer, or maybe a piece of stained and finished exterior grade wood trim over a paint primed end?

Just a thought.
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