Yes, this can be used in the laundry room wall.
The backside is NOT primed. Primer applied to front side and 2 edges.
Not in my house!!! And my son is Allergic to everything !!!
This is MDF so it may have issues if it gets wet or sustains heavy moisture from stem from tub/shower.
To finish the edge next to your base board, remove the base board, install the shiplap to the floor, and reinstall the base.
It does not have to be painted, and can be left as-is.
its completely sealed & primered so a little splash here & there wouldn't hurt it. mine is in a bathroom wall behind my sinks & vanity. i painted over the primer.
I used 18ga brads shot from a Porter Cable pneumatic nail gun. I nailed in the tongue area where if you are careful, no nails will show. You will however have to do some face nailing as the pieces DO NOT interlock. I used 1.25" brads when nailing into studs and 2" brads when going through drywall into a stud. Alternatively, you could use some construction adhesive to minimize face nailing. Do not consider using finishing nails and a hammer unless you enjoy the frustration of bent nails and doing surface repairs to the MDF.
A complete installation guide can be viewed via a link on the right-hand side of the product page in order to help you determine if this product will suit your project needs.
You do not need to prep the boards before painting. Just make sure the boards are clean and dirt/grime free before painting.