External sill profiles to order — coated steel sheet

An external sill is visible at every window, but its job starts when rain runs down the glass. Properly shaped sheet metal helps carry water beyond the façade face and gives the bottom of the opening a neat finish. SteelProfil offers options adapted to the building’s requirements. This practical detail allows new windows and a freshly completed façade to share a consistent, carefully planned finish.

It is worth coordinating the sill colour with the frame, flashings or roof covering. Sometimes a discreet match works best; elsewhere, a distinct line can emphasise the opening. Sheet metal creates a slim detail that does not dominate the wall. The correct depth and side finishes preserve the window’s proportions, giving a good result both close up and when viewing the entire front of the house.

The slope, projection and front edge shape all serve drainage. Connections to the frame and sides of the opening, executed according to the chosen system, are equally important. A properly prepared sill works with the façade and has a deliberate termination. This is especially relevant during an insulation upgrade, when the new insulation thickness changes the required dimensions and installation of the whole component.

A custom order allows the sill to suit the particular window and planned wall finish. Measure it once the final façade build-up is established so that the proportions are correct. We help compare materials and the range of components needed. This is convenient when replacing windows, refreshing a house or finishing a project where installation conditions vary from one opening to another.

The sheet coating should suit outdoor conditions and the desired appearance. Correct fabrication and care help maintain the surface in line with the material manufacturer’s recommendations. Installation can also include rain-noise reduction measures where provided for by the chosen system. A carefully developed detail therefore supports both the façade’s appearance and the comfort of people using the room.

SteelProfil offers frequent promotions and favourable prices on finishing materials. Our first- and second-grade sheet metal options make it easier to compare purchasing choices, and selected materials are available from stock. Sills made to individual dimensions need an agreed production date. They can then be coordinated with the façade work so that the complete set is ready for the appropriate stage.

It is best to order sills with the whole façade in mind, keeping a common shade and finish across all openings. A clear list of lengths and depths simplifies material preparation and subsequent fitting. You can discuss that plan with us alongside the remaining flashings. The result need not be ornate to look good: an even line below the window and neatly finished edges are often enough to show the care taken with the building.