Channing School, London

Channing School, a well-respected all-girls’ school in North London, is undergoing further development to its junior school. The redevelopment plans include a rear extension, a new hall, upgrades to existing buildings, and enhanced sports facilities further cementing the school’s place among London’s best-equipped educational academies.

The development features a combination of new build and alterations to existing buildings, with significant below-ground structures requiring robust and long-lasting waterproofing. The client demanded a solution that would guarantee durability while

minimising maintenance and the risk of future water ingress is essential in a high-profile educational setting.

To meet the project’s high standards, Smart Concrete, known for its reliable waterproofing solutions delivered a powerful dual waterproofing scheme that ticks all the boxes for client expectations.

Newton Hydrobond 403 (Type A – Barrier Protection)

This advanced external membrane forms a continuous, self-healing layer that blocks water from getting in. It’s installed beneath the building’s slab and along the retaining walls, acting as the first line of defence against water ingress.

Kryton KIM (Krystol Internal Membrane – Type B Structurally Integral Protection) Blended directly into the concrete mix, Kryton KIM turns the concrete itself into a waterproof barrier. Using smart crystalline technology, it reacts with water and unhydrated cement to form crystals that seal even hairline cracks, providing long-term,self-sealing protection from the inside out. Together, these two systems create a fully integrated waterproofing envelope, giving the school’s foundations maximum protection and long-term peace of mind.

By combining Newton’s external membrane with Kryton’s integral waterproofing admixture, Smart Concrete delivered a fully watertight solution one that’s built to last. The system comes with an industry-leading 35-year performance guarantee, giving the school and its stakeholders total confidence that the below-ground areas will stay dry, durable, and maintenance-free, built to last the test of time.

The Channing School Junior Development is a prime example of how advanced waterproofing technologies—provided by trusted experts can safeguard the longevity and integrity of modern educational spaces. With Newton and Kryton systems in place, the school’s investment is future-proofed, ensuring a dry, safe, and inspiring environment for both pupils and staff.