Internal window sill

Design your interior window sill (also called board or window cill) at windows24.com in different colours and decors – always depending on the chosen material. Thanks to the large selection you will find in the product configurator, you can design your window sill exactly according to your ideas. Create a real eye-catcher or let your sills appear pleasantly unassuming. Match the colour tone to your interior design, for example, or choose a contrasting colour. In addition to classic shades such as white, grey or anthracite, there are also various colourful and extravagant shades as well as special RAL colours. Thanks to UV-resistant colours, you can expect no colour changes, even with increased exposure to light.

This means you get window sills that will shine in their original colour for a long time. The high-quality applied colours also make the surface of the interior window sill very easy to clean and resistant to scratches. Whether smooth, silk-matt colours, pearl or fine structure, there are different nuances to choose from for the uPVC and Werzalit models. Determine the desired material in the online configurator and select your favourite colour. From beige marble and cream white to Betolit and wood decor such as light oak, you can design the interior window sill exactly according to your design ideas.

When it comes to window sills (or soffit), a basic distinction is made between interior and exterior window sills. Our exterior window sills, which you can get at low prices in the windows24.com online shop, are made of sturdy aluminium and are therefore particularly weather-resistant. Their main task is to protect the masonry from rainwater run-off, which can otherwise cause nasty stains. For an internal sill, on the other hand, completely different criteria are decisive. It serves as a neat finish to the wall below the window, the so-called sill. And by sealing the window, the sill also prevents heat from escaping to the outside.

The internal window board thus effectively serves to protect against heat loss.

Above all, however, the window sill inside is a decorative surface that you can design according to your own ideas. Picture frames, decorative elements and, last but not least, plants find a place here and give your home a personal character. Functionality and design go hand in hand and determine the choice of material and form.

Interior window boards from Werzalit are made of form-stable high-pressure mouldings and coated with up to five layers of melamine resin. At high temperatures, the coating fuses inseparably with the pressed wooden parts to form an absolutely scratch-resistant surface.

Werzalit window sills are available in the Exclusive and Compact models. While our Exclusive model has a rather classic bullnose design and a cosy appearance, the Compact model stands out at first glance with its striking square design and is best suited to modern interiors.

In another text these are capitalised as the special names of the types

PVC window sills have very similar characteristics. They, too, are stable, scratch-resistant and UV-resistant, and also offer reliable thermal insulation. And if something goes wrong when watering the plants, that's no cause for concern: uPVC is water-resistant and can be easily cleaned with a cloth.

In our online configurator, you can buy your new window sill as an individual piece cut to size and also have the option of ordering matching end caps. This has the advantage that your uPVC interior window sill looks like it was cast from one piece.

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.

Regardless of whether you are building a new house or renovating an existing one: you can easily install your interior window sill yourself. This is usually done when installing new windows, but you can also replace your old interior window sills with new ones separately at any time.

It is important that you precisely measure the reveal of your window beforehand and order the window sill in the appropriate size.

You can determine the length according to your needs and specify the dimensions for the depth or overhang.

Please note that up to a depth of 200 mm, at least half of the window sill must rest on the brickwork in order to provide sufficient stability. Very wide window sills should embedded into the embrasure on the right and left by a professional. Both installation foam and installation adhesive are suitable for installing your window sill. Especially for uneven surfaces, it makes sense to use PU foam, as it is good for levelling out unevenness.

We also provide further information on the tools required and detailed instructions for installing window sills.

Finally, don't forget to seal the joints of your window sill on the inside with silicone. This improves the thermal insulation and at the same time prevents draughts and condensation water from entering.