Aluminium Window Sills

Aluminium Window Sills



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Window sills are an integral part of any passive house. The main purpose of a sill is to cast water away from the fabric of the building and to prevent water ingress.

With passive houses you also don’t want your sills to act as a cold bridge, drawing cold air from outside and allowing it to penetrate into the house; this is where Aluminium comes into its own as a light weight and durable material which allows you to have a long life & color coded sill which won’t act as a cold bridge and will help improve your energy efficiency.

Seamlesss Aluminium supplies a wide range of aluminium sills and can manufacture any type or preferred design to meet your individual requirements.

Our external sills & internal sills can be supplied in a range of colors in order to match your window frames and can be supplied in widths to complement any wall construction.

Aluminium sills provide superior window sills and over sills to the construction and external insulation industries.

  • Eliminate Cold Bridging
  • Lightweight
  • Easy to install
  • Available in required lengths
  • Traditional appearance
  • Powder coated specified Ral or BS number
  • Suitable for use on – ICF, Timber Frame, block build, external insulation projects.

Aluminium Sills can be retrofitted to existing window sills making them the ideal choice for external insulation contractors, or can be used in new build .