Case Studies

Cellular Sash

Cellular Sash


Wood windows inherently will require maintenance and degrade over time. Wood window manufacturers were seeking a low-maintenance, pre-finished, non rot solution to wood.


Chelsea Building Products developed exterior-grade cellular PVC profiles that matched with milled wood window components. The profiles are extruded and shipped to the window manufacturer ready to mortise and tenon, glazed and assembled into a finished window. The finished product is low-maintenance and is water resistant.

  • Chelsea Cellular Sash window components
  • Strong, durable, extruded cellular PVC
  • Low maintenance, lasting beauty
  • UV resistant
  • Highly weatherable, will not warp or rot
  • No painting necessary, but paintable if desired