The window sill is a small detail that combines function and design – it protects the base of the window from water, serves as a surface, and completes the look of the opening. Correct selection and execution prevent damp damage and give a careful finish.
Materials for the sill
Marble and natural stone give a classic look, quartz is durable and uniform, and porcelain granite is economical and hard-wearing. For external sills it is important to choose a material that resists sun and rain without crumbling.
Fall and drainage
An external sill must have a slight outward fall that drains water away from the wall, plus a projection with a drip groove that prevents run-off down the facade. A small detail that prevents damp staining below the window.
Finish and matching
Precise cutting, a sealed junction to the frame and correct sealing around the sill ensure a clean finish with no water ingress. Matching the tone to the window and cladding completes the look.
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