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Sanded blue
Custom-made flat door threshold
  • Authentic Belgian blue stone
  • Easy to configure
  • Gray or blue sanded finish
  • Renier: Top Quality from Our Own Quarry
Miter Cut Option
By default, a miter cut is always 45°, either with an inside or outside angle. Other angles are possible; please specify this clearly in the "Comments" field (at checkout).
Drawing of an L-shaped mitered door sill (interior)
Cushion Options
To ensure a proper fit with other building components, it may be helpful to place a shim on a threshold. Either the 1-centimeter-thick shim extends across the entire width, or it stops 5 centimeters from the front (see drawing) It is not possible to combine a cushion with a miter joint.

Custom-made flat door threshold

€ 0,00

Price per item, including VAT

€ 0,00

Price per square meter, excluding VAT and without options

This custom-made flat door threshold is a timeless and durable solution for both renovation and new construction. The threshold is made of Belgian blue stone (arduin), a natural stone known for its strength, durability, and elegant appearance. Thanks to its smooth finish and sanded top layer, this threshold combines functionality with a stylish, modern look.

Easily customize your ideal flat door threshold with a drip groove right here. Select the desired finish, thickness, length, and width below, along with any optional features. The price per piece and per m² is calculated automatically. You can always adjust the finish as desired. Then click “Add to Cart” and complete your order. Delivery time: 2 weeks.

Is the length greater than 180 cm? The threshold will automatically be split into multiple pieces. Enter the desired division using the additional fields that appear.

Available on backorder


L Mitre cut on the inside
L Mitre cut on the outside
L Full-width cushion
L The cushion ends 5 cm from the front

R Mitre Cut (Inward)
R Mitre Cut (Outside)
R Full-Width Cushion
R The cushion ends 5 cm from the front

Total area per piece: 0

Total area: 0

Our Belgian blue stone is one of the most sustainable materials on Earth. This ancient stone, which has been formed over millions of years, is quarried and processed locally in an environmentally friendly and sustainable manner.

You can easily customize this flat door threshold to your liking:

  • Blue stone from our own quarry (La Préalle in Sprimont)
  • Finish:
    • Top, front, and both ends (5 cm) sanded blue or gray
    • The front and both ends (5 cm) can optionally be finished with a beveled edge for a stylish look
  • Straight cut, with a drainage groove measuring 0.6 x 0.6 cm, 2 cm from the front edge, ending 2 cm from the machined ends.
  • Options:
    • 45° miter
    • 1-centimeter-thick cushions across the entire width

    • 1-cm-thick cushions that end 5 cm from the front

  • Thicknesses ranging from 2 cm to 20 cm
  • Complete flexibility in dimensions.

Download Technical Data Sheet
Download all images
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Frequently Asked Questions

Can I have a door threshold made entirely to my specifications using Belgian blue stone?

Yes. You can configure the door sill to your desired length, width, thickness, and finish within the available product options.

For this custom-made product, you can choose between a blue-sanded and a gray-sanded finish, among other options. Depending on the product, additional edge finishes or options may also be available.

Yes, the flat door sill is designed to be an exterior sill and is equipped with a drip groove. This helps rainwater drain off the bottom of the sill instead of running back toward the facade.

For longer lengths, the threshold can be divided into several sections for technical and practical reasons. Please clearly specify the desired division if the joint location is important.

For this custom-made product, Renier estimates a delivery time of approximately 2 weeks. The exact delivery time may depend on the design, quantity, and production schedule.