Originally Posted by ghostrider
Over time, the triangle method can stretch out the hanging and distort it. All the weight is on the corners instead of evenly spread across the entire width of the piece as with a sleeve. Something to consider.
I sometimes put a center piece in it also. Depends on how big the wall hanging is. If it is a bigger one I will do the sleeve. Small ones such as 'large blocks style' I use the triangles. But a very good point. Thanks!