
Overlay Renovation Window Sills in Białystok
An overlay renovation sill is a fast way to refresh an old sill without chiselling or removal. We glue the thin profile straight onto the existing base — concrete, terrazzo or timber — and instead of renovation work you get a new, attractive sill.
How Does an Overlay Sill Work?
An overlay renovation sill is intended for fitting onto old sills — concrete, terrazzo, timber and the like. It is a thin profile that we lay over the existing base, so there's no need to chisel out or remove the old sill.
Once fixed with mounting adhesive, the overlay forms a single, coherent whole with the old sill, giving it a new, attractive look. It is a fast way to refresh the window area — with no rubble, no chiselling and no major renovation. In Białystok and across Podlasie it is often chosen by those who are renovating an interior in stages and don't want to start the work by tearing things out.
- Glued onto the existing sill.
- Onto a concrete, terrazzo, timber and similar base.
- No chiselling or removal of the old sill.
- Thin overlay profile, fast refresh.
Who Is a Renovation Sill For?
An overlay sill is a choice for people who want to refresh an interior without renovation work. It works well where the old sill holds firm but already looks unattractive — scratched, stained or simply not matching the new interior.
It is a good solution for flats in blocks and tenements, where chiselling out a concrete sill would be a nuisance, and anywhere that speed and a clean job matter. We'll match the overlay in colour to the window and the interior, including new uPVC windows. The solution is compatible with uPVC, timber and aluminium windows.
- The old sill holds firm but looks unattractive.
- Flats in blocks and tenements — no chiselling of concrete.
- Refreshing in stages, with no major renovation.
- For uPVC, timber and aluminium windows.
Choosing and Fitting a Renovation Sill
Choosing an overlay sill starts with a free on-site survey — we check the condition and dimensions of the old sill and choose the colour of the overlay. If the old base holds firm, gluing it on is fast and clean, with no rubble.
We carry out the work with our own Pro-Plast crew, and the purchase can be spread over instalments. As a local Białystok firm we give a 5-year warranty. If you're also planning to replace the windows, we'll match the sill to new uPVC windows — book a free survey or call 602 488 413. You'll find the other types of sill on the window sills page.
Frequently asked questions
How does an overlay renovation sill work?
Does the old sill have to be removed?
On what base can an overlay sill be laid?
Does a renovation sill suit my windows?
How much does a renovation sill cost in Białystok?

Ready for a warmer, quieter home?
Book a free measure-up — we'll take care of the rest. No deposit for a chat, no hard sell.
