Thread: Bookmatched top warped

That logic is sound, Fanlee.

I've had a similar problem with Tassie oak and ended up rejointing and re-bookmatching it
with a more robust system of stabilization whilst the glue dried.
That worked a treat, but I still think you should try the steam method first.

Come on Stu, tell him what to do.

Originally Posted by fanlee

Hi.
I've actually been PLAYING some of my guitars...but...I browse this forum & off I go again!! )
I have joined a bookmatched Victorian Blackwood top - reasonably well - but it has warped before I copuld finish surfacing it.
The high spot is right down the glue line extending about 3cm either side of the centre.
From conversation with the more experienced, the advice was to steam the piece & then clamp flat it for a week, maybe two, and to place a thin wafer of something under the 'pivot point' of the bend for a bit more purchase.
However on one point I'd like more input before trying this is...Do I 'steam' the whole top both sides or the side that is concave upwards or the side that is convex downwards that is the 'inside' of the 'u' or the outside (bottom) of the 'u'? My logic for what it's worth (LOL) tells me to put the steam into the 'short' side that is the concave upside (inside of the 'u')
TIA
RobSm

Well there you go, while i was typing Stu answered.
I read your mind Stu.
Regard Bob
http://www.tasmaniantonewoods.com

Originally Posted by oz tradie

That logic is sound, Fanlee.

I've had a similar problem with Tassie oak and ended up rejointing and re-bookmatching it
with a more robust system of stabilization whilst the glue dried.
That worked a treat, but I still think you should try the steam method first.

Having good wood spin on ya is a joy, ain't it?

My first comment is that your logic is sound - get some moisture back in the 'short' side of your piece.

Paper towel flat-wad soaked in dihydrogen oxide under the piece with a slab of stubbies on top to weigh things down has worked a charm in the past. Leave it a few days and she may come good.

If you have to resort to steam, recommend taking note of what agent you used to join the stuff in the first place and steam the whole lot if you can, then chuck the slab on it again.

Interested in knowing why the thing did the dance on ya in the first place:
- Green timber?
- Odd glue?
- Too much side pressure when joining?

Let us know how ya go, yeah?

Best,
Riggsy

PS - Sure solve? Rip it down the guts and re-join it.