White External Window Cills

Durable White uPVC External Cills for Windows & Doors

Our White External Window Cills provide a clean, professional finish while helping to direct rainwater away from the building. Manufactured from high-quality uPVC, these external cills offer a low-maintenance and long-lasting alternative to traditional timber cills.

Suitable for new-build properties, replacement windows and refurbishment projects, white external cills remain one of the most popular choices for both domestic and commercial installations.

Why External Window Cills Are Important

External cills play an essential role in protecting the building fabric by allowing rainwater to drain clear of the wall below the window. Correctly installed cills help prevent water staining, damp penetration and damage to surrounding surfaces.

The integrated drip detail helps ensure effective water management and long-term performance.

Benefits of White External Cills

• Low Maintenance uPVC Construction
• Bright White Finish
• Weather Resistant
• Will Not Rot or Corrode
• Easy to Clean
• Long Service Life
• Suitable for New Build & Replacement Windows
• Professional Finished Appearance
• Available in Multiple Widths
• Available from Stock in Bristol

Suitable Applications

• uPVC Windows
• Aluminium Windows
• Replacement Windows
• New Build Homes
• Extensions
• Conservatories
• Commercial Buildings
• Housing Developments
• Property Refurbishments
• Garden Rooms

Available Sizes

White external cills are available in a range of widths to suit different wall constructions and installation requirements. Larger projection cills are available for deeper wall builds and specialist applications.

Matching end caps are also available to provide a neat and professional finish.

Low Maintenance & Long Lasting

Unlike timber alternatives, uPVC external cills do not require painting or regular maintenance. They are resistant to moisture, weathering and UV exposure, helping them maintain their appearance for years.

The smooth white finish is easy to clean and complements virtually all window styles.

Perfect for White Window Installations

White external cills remain the standard choice for white uPVC window installations, creating a coordinated appearance while delivering reliable weather protection.

They can also be used alongside coloured window frames where a contrasting white finish is required.

White External Window Cills Bristol

Master Plastics has supplied window finishing products, roofline materials and building plastics throughout Bristol since 1994. We stock a wide range of white external cills, end caps and window finishing accessories for trade and retail customers.

Call 0117 971 9922 or visit our Bristol trade counter for expert advice and competitive prices on White External Window Cills.