Window Sill Installation

Window Sill Installation Instructions

The length and depth of the window sill is specified by the customer. The max length of a window sill is 120″, and the depth is typically between 4″ and 10″. Thickness is typically between 9/16″ and 5/8″. Finished edge(s) will have a slight radius, and the window sill ends will have straight, cut edges.

  1. Clean ledge to your personal preference.
  2. Measure length of ledge.
  3. Measure length of window sill. Trim window sill if necessary.
    • We recommend cutting window sill with a masonry blade on a skill saw, it can be dry-cut.
  4. Place window sill on ledge to verify fit and look, pull window sill out.
  5. Lay line of adhesive material on ledge.
  6. Place window sill on ledge.
  7. Caulk around edges. Remove excess caulking.
  8. Clean window sill with warm, soapy water, or other cleaning product if preferred.
  9. Dark colored window sills will need to be polished to maintain luster.