GC Double Glazing & Locks

GC Double Glazing & Locks is a family-run business based in Sunderland, with a rich history and extensive experience in the fabrication, installation, and sales of UPVC and aluminium products. Our team boasts over 28 years of experience in the industry, during which we have built a strong reputation for our dedication to providing high-quality products and services to our clients in the North East Area.

Our specialties lie in replacement windows and doors in UPVC or aluminium, aluminium bi-folding doors, and repairs to existing windows and doors, including double glazed units and locks. At GC Double Glazing & Locks, we are committed to delivering a prompt and friendly service, ensuring that our clients' needs are met with the utmost care and professionalism.

Our Services

We pride ourselves on offering a comprehensive range of services to our clients, from repairs and replacements to installations of new windows and doors. Our services include:

• Repairs to existing windows and doors, including replacements of failed (misted) double glazed units, door handles, door Euro-cylinders, multipoint door locks, overhead door closers (aluminium doors), pad handles (aluminium doors), letterboxes, hinges, new door panels, window locking mechanisms, and new handles in white, chrome, silver, black, and gold.
• Gasket renewal and the replacement of thousands of parts.
• Replacement windows and doors, including UPVC windows, UPVC doors, composite doors, French doors & patios, aluminium bi-folding doors, and aluminium windows in white or RAL coloured products.
• Energy-efficient upgrades and the replacement of outdated coloured toplights or leaded glass.
• Euro-cylinder upgrades to more secure, 1-star or 3-star options in line with the latest British Standards (BS EN 1303:2005, BS3621:2007, PAS 24:2007, and BSI TS007:2012).
• Security issue solutions, including the replacement of external door Euro-cylinders without replacing the whole locking system.
• Note that Euro-cylinder and security hardware are now classified under the TS007 British Kitemark with a star rating system. 3-star*** cylinders are awarded a 3-star rating when they pass all criteria of the TS007 BS Standard. 1-star * cylinder locks receive a one-star rating when they meet the criteria of the BS Kitemark but have not passed all tests. Such locks would require additional 2-star rated security hardware to reach a 3-star rating.

At GC Double Glazing & Locks, we are dedicated to providing our clients with the highest level of service and quality, ensuring that their windows, doors, and locks meet their needs and exceed their expectations. With our extensive experience and commitment to excellence, we are confident in our ability to deliver prompt, friendly, and professional services to all of our clients.