How long does a window installation take?

Most single-window installations take a few hours. A full house of windows is typically completed within one or two days, depending on the number of windows and any structural considerations.

Do you offer energy-efficient glazing?

Yes, all our windows are available with A-rated double glazing as standard. We also offer triple glazing for maximum thermal performance, ideal for rooms facing north or exposed elevations.

What areas do you cover for window installations?

We cover Essex, East London, North London, and surrounding areas including Hertfordshire. We typically avoid Central London and inside the A406 North Circular. Contact us to confirm coverage for your postcode.

Can I get finance on windows?

Yes, we offer finance options through our approved finance partners. CII Double Glazing acts as an Introducer Appointed Representative of Phoenix Financial Consultants Limited (FCA FRN: 539195). Finance is subject to status and credit checks.

Our Services

Windows

Precision-fitted windows that transform your home

We supply and install the full range of window styles across Essex and East London. Every window is fitted by our own directly-employed team. No subcontractors, no surprises. Browse our window range below to find the right style for your home.

Assure certified10-year guaranteeNo subcontractorsFinance available

Windows range

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UPVC windows

UPVC Windows

Energy-efficient, low-maintenance frames in 18 colours

Casement Windows

The most popular window style in the UK, side-hinged sashes that open outward for excellent ventilation and a clean, versatile look.

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French Casement Windows

Two full-height sashes that open outward from the centre with no central vertical bar, maximum light and a beautiful unobstructed view.

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Sliding Sash Windows

Classic vertically sliding sashes with authentic period proportions, available in UPVC with spring-balance operation and tilt-clean functionality.

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Tilt & Turn Windows

Versatile European-style windows that tilt inward at the top for secure ventilation or swing open fully like a door for easy cleaning.

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Sash Horn Windows

Traditional vertically sliding sash windows with authentic sash horns, the classic period detail that defines Victorian and Edwardian properties.

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Flush Sash Windows

Period-accurate windows where the sash sits flush with the outer frame, the correct replacement for traditional timber windows in conservation areas and period homes.

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Aluminium windows

Aluminium Windows

Slim-profile aluminium frames for a modern, contemporary look

Slim aluminium frames

Aluminium Casement Windows

Slimline aluminium casement windows with clean sightlines, strong security, and flexible styling for contemporary or traditional homes.

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Slim aluminium frames

Aluminium Tilt & Turn Windows

Aluminium tilt and turn windows with secure ventilation, easy cleaning access, and a sharper modern frame profile.

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Checkatrade

“Fantastic experience from initial survey to completion. The team were professional, tidy, and the attention to detail on the finish was fantastic. Couldn't be happier with our new windows.”

Checkatrade

“Used CII for our entire house of windows. Brilliant from start to finish. Knowledgeable, reliable, and very professional. The quality of the product and installation is second to none.”

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