Lightweight Stone Cills – The Smarter Way to Add Traditional Charm

Stone window cills have long been a hallmark of classic architecture, adding elegance, depth, and character to both period and modern buildings. However, traditional stone can be heavy, expensive, and difficult to work with, especially in projects with tight timelines or structural limitations.

That’s where Stone-Coat comes in.

Developed as a practical alternative to natural stone, Stone-Coat is a high-performance lightweight stone solution that offers the same authentic appearance, without the weight or complexity. Whether you’re working on a new build, renovation, or energy-efficient project, Stone-Coat window cills are the perfect blend of form and function.

What Is Stone-Coat?

Stone-Coat is made from high-density EPS polystyrene and finished with a tough, weather-resistant coating. This innovative combination results in a product that closely replicates the look and feel of real stone—yet is significantly lighter, easier to handle, and faster to install.

Why Choose Stone-Coat Window Cills?


✔ Lightweight – Perfect for high-level or weight-restricted areas
✔ Durable – Designed to withstand the elements, year after year
✔ Easy Installation – Can be installed after main building work is complete, reducing site delays
✔ Low Maintenance – No need for regular sealing or upkeep
✔ Custom Made – Manufactured to suit any size, profile, or colour
✔ Thermally Efficient – Ideal for use with Render and EWI systems
✔ Perfect Match – Can replicate existing stonework with precision

From traditional facades to contemporary designs, Stone-Coat window cills offer the flexibility to suit any style or project requirement. Whether you’re restoring heritage features or adding architectural interest to a modern home, our cills bring a refined, high-quality finish with ease.

A Trusted Choice for Builders, Architects & Homeowners

Stone-Coat has been widely adopted across residential and commercial projects due to its versatility and reliability. Our products are not only beautiful but also designed with the practical needs of today’s construction in mind—minimising labour, reducing structural load, and speeding up installation.

Design Without Limits

In addition to window cills, Stone-Coat is available in a wide range of profiles including window surrounds, door heads, copings, string courses, and more. We also offer fully bespoke mouldings for unique projects.


Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.

More information about our Privacy Policy

You can adjust all of your cookie settings by navigating the tabs on the left hand side.