Custom-made natural stone window sills
A natural stone window sill combines a timeless look with exceptional durability. At Renier, you can choose from a carefully curated selection of natural stone types, all custom-made in our own workshops.
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Our Natural Stone Varieties
Every type of natural stone has its own character, color, and look. That way, you’ll always find a windowsill that perfectly complements your interior.
White Piedra Paloma, honed
Genuine white Spanish limestone with a soft white to cream-colored appearance. Durable, low-maintenance, and elegant.
Sweetened Moca Creme
Beige limestone from Portugal with a warm, natural look. Timeless and suitable for both modern and classic interiors.
Pietra Serena, sweetened
Elegant Italian natural stone with a refined gray color. Sleek, durable, and well-suited for contemporary interiors.
Vinalmont Sweetened
Unique Belgian limestone from our own quarry near Liège. Sustainable, low-maintenance, and moisture-resistant.
Belgian blue flagstone, honed
A Belgian classic from our own quarry in Sprimont. Scratch-resistant, timeless, and exceptionally durable.
Indian Black, sweetened
Jet-black granite with a matte finish. Highly wear-resistant, low-maintenance, and ideal for a sleek interior.
Indian Black Poly
Glossy black granite with a luxurious look. Scratch-resistant, durable, and perfect for modern interiors.
Carrara marble poly
Luxurious white marble with subtle gray veins. Timeless, elegant, and exceptionally stylish as a windowsill.
Estimated Prices for Window Sills
The starting prices listed below are based on a window sill measuring 90 × 18 × 2 cm, excluding VAT. The final price depends on the dimensions, finish, and type of natural stone you choose.
* Approximate prices per piece, excluding VAT. Natural stone is a natural product: color, texture, and veining may differ from the images.
Fully Custom-Made
Your window sill will be custom-made to your desired length, width, and thickness. This ensures a perfect fit for new construction, renovation, or interior finishing.
Straight from Renier
Renier combines more than 100 years of experience with in-house production and a wide selection of natural stone. This ensures quality, craftsmanship, and a durable finish.
Configure your window tablet online
Easily choose your natural stone, dimensions, and finish through our online store.
View all window sillsFrequently Asked Questions About Window Sills
What is the best thickness to choose for a window sill?
The most common thicknesses are 2 cm and 3 cm. The right choice depends on the desired look, the span, and the application.
Can a window sill be completely custom-made?
Yes. All window sills are custom-made. Cutouts, special shapes, and finishes are also available.
Why Choose Belgian Blue Stone?
Belgian Blue Stone combines a timeless look with exceptional durability. Thanks to its natural appearance and wear resistance, it is a popular choice for both renovations and new construction.
How do I measure a window sill correctly?
Measure the width of the window opening and determine the desired overhang on the left, right, and front. If you have any questions, we're happy to help.
What is the lead time for a custom window tablet?
The standard delivery time is approximately two weeks, depending on the type of natural stone and finish selected.
Which type of natural stone is best for a windowsill?
The right choice depends on your interior design style and budget. Belgian Blue Bluestone is popular for its authentic look, while granite and limestone each offer their own unique character and advantages. On this page, you’ll find an overview of the most popular types of natural stone for window sills.