Versatex PVC Stealth Skirt Board is a multi-purpose frieze board and starter strip engineered to help all types of sidings meet ground and masonry contact code requirements. The new 5/4-in. thick plank features an angled top ridge for the first course of fiber cement or composite siding to rest upon. This tapered edge also allows water to run off. Its PVC nature allows it to directly contact ground or masonry with no ill effects.