Pine rails can be used for all your fencing, pergola, greenhouse, paddock and landscaping needs. The Pine rails are batten screwed or bolted to the fence posts horizontally to give a frame allowing palings to then be nailed onto the rails. These are treated with a water-borne preservative called copper chrome arsenate (cca). Treated to H3 which is designed for outside above ground contact use. This treatment is to prevent decay, borers and termites.