Category: Window Sills

  • Nation wide deliveryNation wide delivery
  • Quality SlateQuality Slate
  • Made to MeasureMade to Measure

Window sills

Manufactured from the finest slate our window sill range have everything to offer from our premium product to our budget cost effective option. On this page, you find our standard sizes if you wish to receive a made to measure quotation, then please see our bespoke section of our web site.

Tilemaster adhesives and grouts are available including Fila sealant and cleaners

Welsh Slate Window Sills

Precision made slate sills

Welsh Slate window sills are available in a fine rubbed smooth finish manufactured in a 30mm thickness.

Our standard sizes are found on this page manufactured and ready for delivery. Quarried in the heart of Snowdonia, our dark blue-grey slate has a fine rubbed smooth finish. Sills made from our slate will not only look great, they will also last a lifetime.

Other sizes are available on request please contact our sales team for more information 01766 514700


  • Walls
  • Outdoor

Ottoseal S70 Silicone

Joint Sealant

We recommend using Ottoseal for joints in our slate Coping, Hearths and Window sills.The Matt Anthracite color is a perfect match to our slate and gives a professional finish to any project

Ottoseal S 70 highly notch resistant, there is no migratory staining as with some products on the market. It is suitable for applications in constantly wet conditions, e.g bathrooms and swimming pools.

Ottoseal S70

Mont Black Slate Window Sills

Mont black fine rubbed window sills made from the finest imported slate a premium product manufactured with Precision. Available in a selection in standard sizes.

This premium product manufactured to a high standard is mostly available in our bespoke section we can manufacture various sizes in 30mm 40mm and 50mm thickness.

Dark grey in color almost anthracite, contemporary looking slate that will compliment most window design. See bespoke section for more information on how to obtain a cut to size quotation.

Cleft Riven Slate Window Sills

Cleft window sills have a slightly textured surface very flat and consistent. Popular with home builders for its price and quality, we have standard sizes available that will suit most window openings.

We have a selection of sizes available in our cleft range with two widths to suit both rendered and cl-added wall construction. All standard cleft window sills will have a fine rubbed and beveled front long edge with an option to add a drip groove at an extra cost.

Cleft riven slate sills


  • Walls
  • Outdoor
  • Indoor