Depending on the configuration and number of inner panels it may be required to fabricate the panels in two or more sections. If more than one section is required the joint(s) will be either a biscuit or lap joint. If we biscuit slot the panels we will provide the biscuits with the order. Joint(s) should have glue applied to the biscuits before joining panels together on the wall. A thin layer of wood fill should then be applied over the joints and sanded smooth prior to priming.  We also recommend using some construction adhesive between the sheetrock and the back of the panel to also ensure there is not movement in the seams.