G'day,
I am making some Bee Hive Boxes. I obtained some 6" Pine. I needed to biscuit join them together so that I can saw them to size. I joined the pieces together but when I clamp the two pieces together they tend to size in the middle and do not lay flat. After I clamped them together I placed a very heavy weight to hold the two pieces flat. Could somebody tell me why the pieces tend to rise in the centre.
Cheers Perry