Those Victorian terraces around Purley station weren't built on shaky foundations, and neither should your garden building be. A properly laid concrete base transforms any outdoor structure from wobbly afterthought to permanent fixture.
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Purley's mix of sloping gardens and clay-heavy soil creates unique challenges for outdoor structures. Whether you're installing a workshop behind one of those 1930s semis off Brighton Road or adding a summer house to complement your Edwardian property, the foundation determines everything. Local experience matters when dealing with the particular ground conditions between Riddlesdown and Purley Oaks.
Ground preparation begins with excavation to stable subsoil, typically 150-200mm deeper in Purley's clay areas. Steel mesh reinforcement sits within 100mm of concrete, preventing the cracking that plagues amateur attempts. Proper membrane installation blocks moisture penetration - essential given how water collects in gardens backing onto Purley Downs. Final levelling uses laser equipment, ensuring your structure sits true regardless of surrounding slopes.
Twenty years working these postcode boundaries teaches you things textbooks miss. Like knowing exactly where the chalk meets clay near Kenley aerodrome, or why properties near Sanderstead station need extra drainage consideration.
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Standard 3x2 metre bases start around £850, with larger 6x4 metre slabs reaching £2,200. Sloping sites common to upper Purley may add 15-20% due to additional excavation and levelling requirements.
CR8 forms our core territory, from Purley Way shopping district across to Riddlesdown Common. Regular projects take us through Kenley's residential streets and up into Coulsdon's newer developments.
Most residential bases complete within 2-3 days, weather permitting. Curing requires an additional 48 hours before placing heavy structures - though smaller sheds can go up after 24 hours.
Each base carries decade-long protection against settlement or structural failure. This covers materials and workmanship, with annual checks available for the first three years at no charge.
Absolutely - terraced solutions work brilliantly on slopes exceeding 1:6 gradient. Retaining walls built into the base design create level platforms whilst managing water runoff, particularly useful for properties backing onto the downs.
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