90mm Aluminium Sub Cill (Anthracite Grey RAL 7016)

Our 90mm Aluminium Sub Cill is designed to provide a strong, reliable base for aluminium doors and windows, ensuring proper support, drainage and a clean external finish. Manufactured using the trusted Cortizo aluminium system, this sub cill combines durability, precision engineering and modern aesthetics.

Available in a range of colours, it perfectly complements contemporary aluminium frames while offering excellent resistance to weathering, corrosion and everyday wear.

Engineered with a sloped profile and integrated drainage channels, the sub cill helps direct water away from the building, improving long-term performance and protecting the installation below the frame.

Ideal for use with bifolds, doors, sliding doors and aluminium window systems, this sub cill ensures a stable installation while maintaining the sleek, minimal look aluminium systems are known for.

If there is a particular size you are after or a design option not provided on the site please contact us on 0203 355 5311 and our consultations team will be happy to help.

• Guarantee: 10 Years
• Brand: Cortizo

We at Glass Openings will carry out deliveries manufactured by us and will be free for orders that are over £1200.00. Any orders under £1200.00 will incur a delivery charge based on location.

Lead times stated at the time of ordering are not final. All delivery times are from the date we receive a finalised order, online or e-mail and when payment is made in full. Any modifications to the order will more than likely result in a delay to the delivery.

The delivery term varies by product.

Customers have a legal right to cancel orders up to seven days after the order has been placed and can receive a full refund. This statutory period of seven days does not apply on all products as the return and cancellation policy varies by product categories. As the Glass Openings store offers both bespoke and stock items, please read carefully to determine what return and cancellation policy is associated with the product you are ordering.

Please find more information on our Delivery Information & Returns and Cancellation Policy pages.

For technical downloads and product installation manuals, please visit our Downloads page.