Welcome to HZ Double Glazing
Based in London, we supply and professionally install high-performance aluminium and uPVC windows, bespoke shutters, and secure doors. Our premium range includes custom glass rooflights, and slim steel windows and doors engineered for durable, energy-efficient modern properties.
With over 20 years of experience, we deliver exceptional, lasting craftsmanship across London.
As a fully accredited FENSA approved installer, every window and door installation we complete is officially certified to comply with strict national UK building regulations.
Explore our range of products
Looking for a hassle free window /door/ shutter replacement?
We supply and professionally install a premium range of double glazed windows, doors and custom plantation shutters tailored for homes and businesses.
Windows
Aluminium and uPVC windows, Fire-rated and Heritage Style.
Expert supply, fitting, and repairs for homes and businesses.
Doors
In Aluminium, uPVC & Steel including:
French, Bifold, Fire-rated, Front & Patio. Supplied and installed in London.
Rooflights & Skylights
Explore our extensive range of rooflights and skylights to enhance your space with natural light.
Steel Windows & Doors
Steel products deliver enduring elegance and industrial character, blending classic design with expert craftsmanship for a uniquely striking appeal.
Shutters
See samples, get advice, and receive your free quote.
Compare uPVC, Basswood, and Paulownia Shutter materials. Find the perfect waterproof, lightweight, or sustainable option for every room in your home.
Our Services Offered
Delivering reliable installation, repair, and maintenance of aluminium and uPVC glazing products — built around residential and commercial property needs.
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.
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.
