The Framers Forum

I'd left the heater on full overnight and the gum tape has lifted from the pine frame - has anyone experience of damping the wood prior to applying the gum tape. I wondered if it helped bond the tape. I use one of those roller dispensers for the tape and haven't had this beofore but I know the picture is going in a very warm house.

Shouldn't do that.

was the pine surface unfinished or does that back have some sort of coating on it? There are some mouldings where gumtape will just not stick. Usually a bit of a tickle with some sandpaper to rough up the surface does the trick.
Or it could be you haven't got the tape quite wet enough.

It's a Liom beech veneer and I think you idea of roughing it up ever so slighlty might work. I'm sure enough about thetape being wet enough in the frst place - another tough I've had is to apply some diluted pva carefully before taping it up. Any more thoughts?