[pianotech] Bottom Board Material

[Phil Frankenberg]

Absolutely the maple. I think Wim is thinking knee board. The fact that you 
were concerned about screws holding clarified the ambiguity for me.

Phil Frankenberg
CSUChico
Chico Ca.

----- Original Message ----- 
From: "Wim Blees" <tnrwim at aol.com>
To: "Pianotech" <pianotech at ptg.org>
Sent: Thursday, February 17, 2011 5:44 PM
Subject: Re: [pianotech] Bottom Board Material


Terry

If you have the maple, and the equipment to do edge glueing, I would suggest 
that. You will, however, have to cover the finished panel with veneer, the 
same wood as the rest of the piano.

Wim

Sent from my HTC PURET, a Windows® phone from AT&T

-----Original Message-----
From: Terry Farrell <mfarrel2 at tampabay.rr.com>
Sent: Thursday, February 17, 2011 2:51 PM
To: pianotech at ptg.org
Subject: [pianotech] Bottom Board Material

I will be fabricating a new bottom board for a customer's vertical
piano (moisture/mold damage). Any opinions on the best material for
the job?

I suppose some sort of plywood. I am using a hardwood veneered
gazillion-ply plywood for another project and am surprised at how soft
it is - I don't think that will be the best thing. My concern is for
screw holding. I don't know my plywood grades all that well. I should
think an exterior grade of ply made of yellow pine or something
similar with one side sanded (the inside side) would do the job well.
Is there a grade designation that specifies good hard wood that will
hold a screw well?

Or should I just make it out of a couple pieces of edge-glued (some
sort of water-proof glue) hard maple? I have tons of that in my shop -
I would have to make a trip to the lumber yard for plywood.

Comments? Suggestions?

Thanks!

Terry Farrell