You read that right, shiplap! In a motorhome! Well, ok - it's faux shiplap; more like RV-friendly shiplap. We used super light 5mm underlayment cut into 6-inch planks, and just affixed them to the wall with Liquid Nails and a nail gun. Slap some paint on those bad boys, and bam! We've got some rustic-modern elements that add texture and clean lines to our space.