James Hardie HardiePlank Weatherboard PrimeLine Chamfer 4200 x 300mm PrimeLine is a range of durable fibre cement weatherboards in a range of profiles that imitate traditional and contemporary timber weatherboard styles. Being fibre cement, PrimeLine weatherboards resist damage from rot, moisture, termites and fire when installed and maintained correctly. The time saving HardieLock insert sets the board overlap. Achieves the deep shadow line of a much thicker board. Pre-primed and ready to be painted on-site. Chamfer profile comes in a double width board for fast wall coverage. Clean lines to create a shadow effect. Quick and easy to install.