30-03-2014, 11:45 AM
Fine Woodworking magazine ran a story on wood adhesives several years ago. I don't recall the details, or if they rated them for water resistance, but white and yellow PVA glues differed mainly in tackiness. They're all aliphatic. No PVAs were rated for structural applications as they all creep under stress.
FW also ran a more recent article on the strength of glued finger joints, which they tested to failure, but again that was aimed at indoor furniture.
I used resorcinol years ago; it's absolutely waterproof and doesn't creep but I think epoxy has displaced it, and that's what I use for outdoor work. "Gorilla Glue" bonds well, is waterproof (cures from moisture actually) and fills gaps but I don't trust urethanes for the long term, having seen too many turn to sticky goo eventually.
It's pretty damp outdoors today but on the whole, wood frame buildings last well in this climate. I can't think of a single stone or brick house in this entire town. Some of the public buildings are brick.
FW also ran a more recent article on the strength of glued finger joints, which they tested to failure, but again that was aimed at indoor furniture.
I used resorcinol years ago; it's absolutely waterproof and doesn't creep but I think epoxy has displaced it, and that's what I use for outdoor work. "Gorilla Glue" bonds well, is waterproof (cures from moisture actually) and fills gaps but I don't trust urethanes for the long term, having seen too many turn to sticky goo eventually.
It's pretty damp outdoors today but on the whole, wood frame buildings last well in this climate. I can't think of a single stone or brick house in this entire town. Some of the public buildings are brick.
