Steve Van Kirk
09-24-2014, 7:50 AM
Hi folks,
First post, so go easy on me. :)
I'm building a dining table for my wife out reclaimed Douglas fir structural timbers. The wood is over 100 years old and has tons of "character" - knots (filled w/epoxy), nail holes, small splits/cracks, powder-post beetle tunnels, etc.. "Rustic elegant" is what we're going for. The top is made from four individual planks that are approximately 10-11" wide by 7' long by 1.5" thick. It is not glued up as a single panel. The planks were intentionally not milled to perfection (e.g. don't have uniform thickness, not planed perfectly flat, etc.). When you run your hand over them, you'll notice the areas that were sanded deeper out of necessity. This was intentional & was part of the overall look & feel we wanted.
The construction & finish-prep is 99% complete. Within a few days I'll be ready to start applying finish. I have chosen Waterlox. I'll be using the original sealer for the first coats & ending with a couple coats or so of the satin.
So leading up to my question: my wife and I like the idea of leaving the underside of the table unfinished so that people who dine with us can sign it. I'm a little uneasy about this, however, because I've read that if you don't finish all sides of a board equally, you can get have problems. Moisture will affect faces of the board unequally during seasonal changes, so cupping, etc. may occur. Yet the table we currently have is unfinished underneath and we've never had any trouble.
So my question is this: should I finish all sides of the table-top planks, or is it safe to leave the underside unfinished?
FWIW, I live in the Pacific NW. The seasonal moisture maps I've seen show that the variation for indoor woodwork isn't as large as other parts of the country.
Thanks for the help!
Steve
First post, so go easy on me. :)
I'm building a dining table for my wife out reclaimed Douglas fir structural timbers. The wood is over 100 years old and has tons of "character" - knots (filled w/epoxy), nail holes, small splits/cracks, powder-post beetle tunnels, etc.. "Rustic elegant" is what we're going for. The top is made from four individual planks that are approximately 10-11" wide by 7' long by 1.5" thick. It is not glued up as a single panel. The planks were intentionally not milled to perfection (e.g. don't have uniform thickness, not planed perfectly flat, etc.). When you run your hand over them, you'll notice the areas that were sanded deeper out of necessity. This was intentional & was part of the overall look & feel we wanted.
The construction & finish-prep is 99% complete. Within a few days I'll be ready to start applying finish. I have chosen Waterlox. I'll be using the original sealer for the first coats & ending with a couple coats or so of the satin.
So leading up to my question: my wife and I like the idea of leaving the underside of the table unfinished so that people who dine with us can sign it. I'm a little uneasy about this, however, because I've read that if you don't finish all sides of a board equally, you can get have problems. Moisture will affect faces of the board unequally during seasonal changes, so cupping, etc. may occur. Yet the table we currently have is unfinished underneath and we've never had any trouble.
So my question is this: should I finish all sides of the table-top planks, or is it safe to leave the underside unfinished?
FWIW, I live in the Pacific NW. The seasonal moisture maps I've seen show that the variation for indoor woodwork isn't as large as other parts of the country.
Thanks for the help!
Steve