Doorwins aluminium windows and doors

Golden Ratio Sash Windows & Doors is London’s premier specialist in the restoration, manufacture, and installation of traditional timber windows. From our local workshop, our time-served craftsmen use traditional joinery methods and premium materials like Accoya® to faithfully replicate original features while enhancing energy efficiency. We specialize in bespoke double-glazed sash windows, casement windows, and elegant French doors tailored to period properties. Our services include professional draught-proofing, timber repair, and full window replacements across London. With a 10-year guarantee and a commitment to punctuality and craftsmanship, we help preserve your home’s heritage while improving comfort and value.

Doorwins Dearden is the aluminium and uPVC double glazing division of Doorwins, supplying high-quality windows, doors, and energy-efficient glazing solutions across London. We specialise in aluminium bifold doors, sliding doors, casement windows, roof lanterns, skylights, as well as uPVC casement and tilt and turn windows, composite doors, and replacement double glazing for homes and residential developments. Known for reliability, competitive pricing, and technical expertise, Doorwins Dearden offers supply-only, supply and fit, and bespoke manufacturing services to homeowners, landlords, builders, and contractors. Our products are designed to meet modern thermal, security, and building regulation standards, with expert guidance provided f

Specialist Woodcare Company