London’s increasing density is forcing homeowners to build down, rather than up or out, to create more space. Subterranean extensions can sometimes triple the size of the street level home. The challenges with constructing down in tight quarters among heritage buildings are numerous.
One homeowner in the wealthy Belgravia district of London tasked Abbey Pynford with designing an eight meter (26.25 ft.) deep basement beneath their existing six-story property. When Pynford took on the challenge they knew it would face several challenges not least how best to waterproof the space.
Abbey Pynford used a top-down approach to construct the basement and added Kryton’s Krystol Internal Membrane (KIM) concrete waterproofing admixture to the concrete. “The flexibility and workability of the Kryton product range enabled a number of construction techniques to be employed which best suited the ground conditions and engineering requirements for each element of the project,” Abbey Pynford divisional manager Lewis O’Connor.
Pynford also used Kryton’s Krystol Waterproofing System to completely tank the new basement.
The final cathedral-like space provided the homeowners much-needed space and will be water-free for the life of the building.