When choosing the right material for your window board, the decisive factor is whether it is intended for indoor or outdoor use. Aluminium is a predominant choice for the exterior, as it is less susceptible to weather damage due to its natural corrosion protection. In addition, it proves its durability by retaining a smooth and beautiful surface over the long term and requires low maintenance.
Natural stone is also popular for externally mounted window sills – marble, slate and granite are particularly suitable here. However, since marble is quite high-maintenance and also reacts sensitively to water, it is more suitable for interior window sills. A granite window board, on the other hand, is similarly robust as a model made of aluminium. The biggest disadvantage of window sills made of natural stone: their price is comparatively high.
More favourable is usually artificial stone, which, depending on the quality, has a long service life and is also more break-resistant, but is generally used more indoors. If you have a lot of wooden furniture, a wooden window sill can also look attractive. In this case, however, you have to accept a reduction in robustness, because the material is extremely susceptible to dirt and water damage.
The best materials for interior window sills have proven to be uPVC and specially coated pressed wood parts. Both materials are characterised by an excellent price-performance ratio, react insensitively to most external influences and require little maintenance.
In the kitchen and bathroom, tiles are often used for the window sill. These are usually better suited to humid air and provide a visual finish to the room in question.