We always recommend installing into studs over drywall. Nailing the tongue of the shiplap into the studs behind the drywall will be enough to support the weight of the product. You can also nail into the bottom or the face of shiplap if you want the added security. Use our Metrie Complete Finishing Kit to cover up the additional nail holes.
Our shiplap is 1/2” thick which may not meet all building requirements if you want to install without drywall. If you don't already have drywall, you need to ensure the wall is flat prior to installing shiplap and that any gaps between panels are covered so you don’t see into the wall. Installing over drywall will also ensure that if you decide to change the wall in the future, you only need to pull down the shiplap.
Due to many variables including the size of the space being covered and the strength of your drywall, we suggest you secure each plank directly to the studs of your wall. If this is not an option, such as for a ceiling installation, you can attach the shiplap to wood furring strips of at least 1/2" thickness.