Cross grain wood movement ???

[tusses]

ok - I have been thinking again

so ...

wood moves with moisture content , we all know that.

but

at what thickness do we need to worry about it ?

i.e. you veneer a slice of hardwood onto mdf/ply etc and take it as stable, yet if you make a frame and panel, you dont glue the panel - duh ! - cuz it dont work

carry on

[robo]

Timber is never fully stable whatever the thickness.

Veneers shrink - that's why both sides should be veneered and even cross banded.

R

[dunbarhamlin]

Much of my stuff is between 1/32" and 1/8" - and seasonal movement is a major issue whatever the thickness, to the point that it limits when I can glue up.
It's why instrument soundboards are generally quarter sawn, to try and limit the self destructive effects of cross grain movement.

[engineerone]

the reason you veneer both sides is not just the movement of the veneers, it is also to minimise the bending moment if done on only one side

paul

[tusses]

is there a chart anywhere that shows the amount of movement per species against moisture change ?

[dunbarhamlin]

Google is your friend
Bear in mind these are averages, and each piece of wood will be different
HTH
Steve

[tusses]

Thanks dunbarhamlin , Google is indeed my freind - but I try to ask questions that the answers will benefit the forum

if we all just googled, there would just be the pub !