The jobsite is a tough world for a sill. Conditions are never perfect and your sill is going to take a hit. Stop paying for it and start planning for it with the Replaceable Deck Sill (RDS). RDS is the first and only sill system that eliminates the costly, time-consuming and labor-intensive task of addressing sill deck damage. Plus, RDS helps quickly identify non-level openings and address imperfect site conditions in a matter of minutes.