Welcome to HZ Double Glazing

Based in London, we specialise in aluminium and uPVC windows, doors, shutters, glazing, rooflights, Crittall-style products, and more — all professionally supplied, expertly fitted, and built to last.

With over 20 years of experience, you can trust us to deliver lasting results.

Trusted by countless satisfied customers.

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About Us

We’re a family-run team specialising in aluminium and uPVC windows, doors, shutters and more — Combining expert fitting with personal care, honest advice, and high-quality results you can trust.

Choose us for reliable service and lasting craftsmanship.

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Window installer in orange shirt holding a uPVC window sill

Our Services Offered

Delivering reliable installation, repair, and maintenance of aluminium and uPVC glazing products — built around residential and commercial property needs.

Window hinge before and after maintenance and repair

Supply & Fit Solutions

Family-run specialists offering supply and/or fitting of high-quality aluminium and uPVC products tailored to your needs.

Product Advice Services

Expert guidance to help you choose the perfect aluminium and uPVC products — tailored for your home’s style, energy efficiency, and durability.

Repairs and Maintenance

Expert repair and maintenance for aluminium and uPVC windows, doors, and glazing — keeping installations secure, energy-efficient, and durable to save you time and money.

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Explore our range of products

Discover our wide selection of products, each designed for durability, energy efficiency, and style—perfectly suited for both homes and businesses.

Windows

Aluminium and uPVC windows + Fire-rated and Crittall-Style. Expert supply, fitting, and repairs for homes and businesses.

Doors

High-quality aluminium and uPVC doors, including front, patio, French, bifold, fire-rated, and Crittall-style designs. Supplied and installed in London.

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Rooflights & Skylights

Explore our extensive range of rooflights and skylights to enhance your space with natural light.

Crittal-Style Products

Crittall-style products deliver enduring elegance and industrial character, blending classic design with expert craftsmanship for a uniquely striking appeal.