Ted in NE-OH

Well-known Member
Some of my boards on my barn siding have rotted ends. If I remove the rot can i fill in with Bondo, will it work ok?
 
Get Rock Hard wood filler at Lowes. Very easy to use. Much easier than bondo. And much easier cleanup.
Richard in NW SC
 
(quoted from post at 18:06:06 09/25/15) Get Rock Hard wood filler at Lowes. Very easy to use. Much easier than bondo. And much easier cleanup.
Richard in NW SC

But is it water proof????
 
I've used Minwax Wood Hardener before to stabilize wood (and other substances such as deer antlers) for knife handles. It's particularly useful when the wood you want to use is spalted, which of course is just a fancy term for rotten, and you want to stabilize it from rotting further, allow you to shape it without crumbling, and make it hard enough to hold up to the use a knife handle will see. At 10 bucks or so a pint it's probably not cost-effective if you have a large area to do, but it does an excellent job at what it's supposed to do. The flip side is that it is REALLY hard to work (sand, shape, etc.) once it's set--it clogs up sandpaper and even rasps lickity-split. I find it worth the effort as it allows me to use numerous sorts of wood with pretty grain and spalting patterns that would not be usable without it. Link below is the first one to pop up on Amazon--I know nothing about the specific seller, but any decent hardware store will probably carry it.
Minwax wood hardener
 
I repaired some dry rot and termite damage on a facia board on my house with bondo 15 years ago , it still looks great . The paint has stayed on perfectly , while the rest of the board has dried and cracked with age ...
 
Bondo works as good as any filler. Problem is, with time, fillers don't work all that well. Wood contracts and expands with humidity but the filler doesn't so filled knot holes become loose and repaired bottoms, like yours, fall off. You could redo it every couple years.
 
I've seen building repairs where someone cut off the bottom of all the vertical siding at one common height, and installed one or two courses of new horizontal siding across the entire bottom edge of the building. The new bottom siding was painted the same color as the fascia trim and the corner trim. If done right it looks pretty good. They loosened the bottom of the cutoff siding to slip the top edge of the repair under the old siding for a better weather seal.
 
Yes it will. Bondo actually makes a wood filler. As others have said there may be a better way to do it though.

Steven
 

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