I have a split level mid-century built in 1969. It has protruding exterior beams that have been painted. I noticed that one has rotted internally and was sloppily repaired with foam backer and spackle that has fallen off. I'm going to craft aluminum flashing to install on top to shed water off of all beams, but what is the best way to repair this beam? I'm thinking about removing the rotten wood and filling the void that is probably 4-5" wide and and inch deep. What is the best filler to use? Or should I try something else?
Wood – How to repair wood rot on exterior (decorative) exposed beam
exteriorwood
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Best Answer
It depends how you personally define best. The absolute best (money and time no object) is to replace it.
Before you start, be prepared that the rot may go a lot further than you expect (though maybe it won't of course).
For small areas, Wood filler :-)
For slightly larger areas, Wood. Appropriately treated and/or painted.
If there is a lot of rot, I'd be thinking of remedial action more significant than filling.
For small areas, you might be able to use a wood hardener.
If it is non structural, you can scarf in a replacement section.
If it is structural, i.e. holding up your roof. I would consult a specialist, in my part of the world that might be a surveyor, elsewhere, a structural engineer maybe.