The window sills
can be 1.2, 2, and 3 cm thick. There have been cases where, according to the architect or designer, window sills are even thicker - up to 10 cm. In such cases, they are made in 45 degree technology, the seam is at the fracture point and is practically invisible. Such thick windowsills are more often chosen by proponents of ascetic and minimalist style, who like clean and straight lines.
Outdoor windowsills
Often customers also choose stone exterior windowsills that match the color of the stone plinth or staircase. Outdoor window sills are usually made on a slight slope for rainwater runoff, but special incisions can also be made.
Indoor windowsills
Low windowsills - often used for seating in public spaces, often deeper than standard windowsills.
There is always enough sunshine on the windowsills, so we love to place different indoor plants there, which in turn are often watered, and in that case tree or mdf will definitely bloat and deform after some time. By contrast, the water left on the stone windowsill simply dries without leaving a trace and does not change the shape or appearance of the window sill.
In our latitudes, there is heater below the windowsills. To cover it visually, the sill is formed deeper, over the radiator. Different types of holes for circulating hot air can be milled in stone windowsills. They can be left exposed, or they can be fitted with metal bars.
If the windowsill is at a sufficient distance above the radiator, it may be possible to do without cuts.