I am building 4 mission style high chairs in red oak for the kitchen
counter. There are about 50 mortise and tenon joints in each one,
counting the spindles.
I have seen so many wobbly chairs in my life I am wondering if there is
a preferred glue to use in the joints. I use Titebond 2 as a rule, and
dont care for the foaming Gorilla glues, but would the expansion
characteristics of those be what I need?
Gorilla glue is a bad idea because of clean-up. Titebond 2 will provide
adequate strength if the joints are milled properly (snug but not real tight
dry-fit) but you might consider Titebond III. Its more expensive and you
don't need the water-proof property but is gives you a longer open time
(about 15 vrs 5 minutes if I remember correctly.) Tiebond also makes a
slow-set but in my experience its not as readily available as the Type III.
The foam from expanded poly glue has essentially zero strength. Poly
glue requires very tight-fitting joints to work properly.
You may want to consider over-drying the pieces with tenons, so that
when they come back up to proper moisture level they swell and lock
themselves into place.
Given that the chair will eventually need repairing, you might consider
a glue that is reversible. Hide glue, or plain white/yellow glue (the
non-waterproof kind) might make sense.
Yellow carpenter's glue, any popular brand, will do. Make sure all
your tenons fit snugly in the mortises, ie, do a dry fit before the
actual glue-up procedure. Wobbly chairs wobble mainly because they
were not made properly or they were put through abuse.
If you are using thru-tenons you might consider wedges to ensure
they never loosen. Titebond and wedged tenons are incredibly strong
joints. Cut a saw kerf (thin) 2/3rds of way through the tenon. Do your
glue-up, force glue into kerf and drive a tight fitted wedge into the kerf.
Contrasting wood for the wedge is a nice touch. My chair teacher says
it will never loosen. Believe him.
I've found a very good epoxy glue that can be ordered from Clearkote
Corp. (727) 898-8611. You can get it in quarts, one can resin and one
can hardener. One advantage to using it is that it doesn't require
clamping pressure to bond, and the bonding strength is comparable
to clamped aliphatic resin glue. You just mix two gobs of roughly the
size. Working time is from 20 minutes to 45 minutes depending on
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.