It is not clear between what elements the cracks are appearing- please
elucidate.
Rick


Sorry when i re-read my post i realised i wasn't so clear.

The cracks appear between each joint of wood. Originally I was going to
screw straps of aluminium on the underside of each piece across the joints.I
was advised it wouldn't be required. It's too late now as they are in place.

It's really depressing as the rest of the room is "perfect".

Any help appreciated.