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  • Shropshire Brick and Stone UK

From uPVC to Stone: Window Sills Throughout the Years

Since their early origins, window sills have undergone various transformations in terms of materials, styles, and functionality. Read on as we take a fascinating journey through time, exploring the history and evolution of window sills throughout the years.

Window cill

What is a window sill?

A window sill is the horizontal ledge or shelf located at the bottom of a window opening, both on the interior and exterior of a building. It serves several purposes, including:


●      providing structural support

●      acting as a transition between the window frame and the wall

●      preventing water infiltration.


In addition to its functional role, window sills also have aesthetic value - they can be designed to match the architectural style of the building and serve as a platform for decorative items, such as potted plants, sculptures, or ornaments. Window sills can also be sloped or angled to facilitate water drainage and prevent water from pooling on the surface.

What did early window sills look like?

Early window sills varied depending on the time period and region, but they generally had a simple and practical design. In ancient times, such as during the Roman and Greek civilizations, window sills were typically made of stone - they were often thick and extended beyond the wall, providing structural support to the window frame and serving as a ledge for the window opening. In some cases, decorative elements were added to the stone window sills to enhance their appearance. These decorative elements could include carvings, mouldings, or inscriptions, showcasing the craftsmanship and artistic skills of the period. However, it's important to note that these embellishments were more commonly found in grand structures or buildings of significance, rather than in everyday homes.

Concrete sills

Concrete, a composite material made of cement, aggregates, and water, has proven to be a popular choice for window sills:


In the early 20th century, the use of concrete in window sills became prevalent, particularly in commercial and industrial buildings. Concrete offered several advantages over other materials, such as stone or wood. It was readily available, cost-effective, and could be moulded into various shapes and sizes, making it suitable for a wide range of window designs. One significant development in the use of concrete for window sills was the introduction of precast concrete. Precast concrete sills were manufactured in controlled environments, which made them an attractive choice for builders looking for efficient and cost-effective solutions. Today, concrete window sills continue to be a popular choice in both residential and commercial construction. They offer a modern and sleek aesthetic, providing a clean, minimalist look to buildings. Concrete sills can be found in a variety of architectural styles, from contemporary designs to industrial-inspired structures.


There are several benefits to using concrete as a material in window sills. Here are some of the key advantages:


●      Concrete is highly durable and can withstand the test of time. It is resistant to weathering, including exposure to sunlight, rain, and extreme temperatures. Concrete window sills are also less likely to warp, rot, or deteriorate compared to materials like wood or certain types of stone.

●      Concrete window sills require minimal maintenance. They do not need to be painted or stained regularly, unlike wood sills - cleaning concrete sills is usually a simple task that can be done with water and a mild detergent.

●      As previously mentioned, concrete can be moulded into various shapes and sizes, allowing for flexibility in design. It can also be customised to fit specific window dimensions and architectural styles.

●      Concrete is generally a cost-effective material compared to other options like natural stone. It is readily available and can be produced locally, reducing transportation costs. The longevity and low maintenance requirements of concrete window sills also contribute to cost savings over time.

●      Concrete is a strong and stable material, making it suitable for supporting the weight of windows and withstanding external forces. Reinforced concrete, which incorporates steel bars or mesh, further enhances its strength and load-bearing capacity.

Stone sills

Throughout history, stone has been a favoured choice for window sills, adding a touch of natural beauty and sophistication to buildings. Stone window sills have a long history, dating back to ancient civilisations. Here’s why they remain a popular choice today:

Aesthetic appeal

Stone window sills possess a natural beauty - the natural variations in colour, texture, and veining of different types of stone, such as marble, granite, limestone, or sandstone, create a unique and visually appealing aesthetic. Stone window sills can complement a wide range of architectural styles, from classical to contemporary, adding a touch of elegance and sophistication to both residential and commercial buildings.


Stone is renowned for its durability, making it an excellent choice for window sills. Stone window sills can withstand the harshest weather conditions, including extreme temperatures, moisture, and UV radiation, without warping, rotting, or deteriorating. They are resistant to fading, chipping, and scratching, ensuring that they maintain their beauty for years to come. Stone window sills are therefore a worthy investment, providing a durable and long-lasting solution.

Low maintenance

Stone window sills require minimal maintenance, making them a practical choice for homeowners and building owners. Unlike materials that need regular painting or staining, stone window sills generally only require occasional cleaning with a mild detergent and water. Their natural resistance to stains and mould makes them easy to maintain, saving both time and effort in the long run.

Thermal insulation

Another benefit of stone window sills is their excellent thermal insulation properties. Stone has a high thermal mass, meaning it can absorb and store heat - this helps regulate indoor temperatures, reducing heat loss in colder months and minimising heat gain during the warmer seasons. Stone window sills contribute to energy efficiency, providing a more comfortable living or working environment while potentially reducing energy costs.

Increased property value

The addition of stone window sills can significantly enhance the property value of a building. Stone is often associated with luxury and quality, and the use of stone window sills can make a strong architectural statement. Potential buyers or tenants are often attracted to the timeless beauty and prestige that stone brings, making it a solid investment that can generate income in the long run.

uPVC sills

Originally, uPVC was primarily used in the plumbing industry due to its resistance to chemicals and moisture. However, its convenient properties soon led to its application in various other sectors, including window manufacturing. Here’s why uPVC is a popular material for window sills:


●      uPVC is highly resistant to rot, corrosion, and weathering, making it an ideal choice for both interior and exterior window sills. Unlike traditional materials like wood or metal, uPVC window sills do not warp, crack, or deteriorate over time, ensuring long-lasting performance.

●      uPVC window sills are practically maintenance-free. In comparison to wooden sills, which require regular painting or staining, uPVC sills retain their colour and finish without any additional effort. A simple wipe with a damp cloth is usually sufficient to keep them looking clean and fresh. This low maintenance requirement saves homeowners time, effort  and money in the long run.

●      uPVC window sills are available in a wide range of colours, finishes, and designs, allowing homeowners to find the perfect match for their aesthetic preferences. Whether you prefer a classic white sill or a wood-grain effect, uPVC can be customised to suit any style or architectural design.

●      Compared to other materials like stone or wood, uPVC is a cost-effective option for window sills. The initial cost of uPVC sills is typically lower, and their long lifespan and low maintenance requirements translate into significant savings over time. Additionally, uPVC sills are lightweight, making them easier and more affordable to transport and install.

●      uPVC window sills are highly resistant to weather conditions, including rain, sunlight, and extreme temperatures. They do not fade, warp, or crack when exposed to harsh elements, ensuring their structural integrity and visual appeal for years to come.

Shropshire Brick & Stone (UK) Ltd - your reliable cast stone supplies

Whatever the needs of your project might be, our team of professionals  here at Shropshire Brick & Stone (UK) Ltd can craft premium-quality cast stone window sills to match your vision and specifications. Whether you’re breathing new life into a residential property or wish to add a timeless look to a commercial development, our specialist design team is on hand to help. Choose from a diverse range of precast concrete sills, or work collaboratively with us to devise a stone sill that’s entirely unique to you. Get in touch with us today to find out more about our services.

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