Builders Tip: Now that the edges of the sheeting are jointed, you still have one more thing to do before you start spreading the glue. On the inside edge that will be butted up to the next sheet sand a small chamfer. The reason for doing this is to give clearance to the very small bead of glue that squeezed out and dried on the other sheet. This bevel will allow the two sheets to more closely butt up to one another.