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

For every Essex home

We fit replacement windows across Essex and East London for homes that need different answers: full-house upgrades, single problem openings, front elevations, bungalows, extensions, and period-style properties.

Made to fit your home

Casement, sliding sash, flush sash, tilt-and-turn, and aluminium frames all solve different problems. We use the survey to match style, opening layout, colour, ventilation, and glazing to the property.

Guaranteed for 10 years

Every window carries a 10-year guarantee on the frame and sealed unit. A+ energy ratings are standard, with Secured by Design hardware available across the right specifications.

From survey to handover

We measure properly, talk through the options, and leave you with a written quote. No subcontracted fitting team, no rushed doorstep decision, and no guesswork from photos.

Assure certified10-year guaranteeNo subcontractorsFinance available

Priority routes

Window work we are asked to price most often

Most Essex window enquiries fall into a few clear routes: whole-house UPVC casement replacement, period-style flush sash work, traditional vertical sash upgrades, and slimmer aluminium windows for extensions or newer homes. We separate those choices on the survey because the right answer depends on the property, not only the preferred look. Frame depth, opening style, ventilation, escape routes, trickle vents, colour lead times, and glass weight all change the quote and the installation method.

Casement windowsThe practical default for most full-house replacements and thermal upgrades.Flush sash windowsChosen when a period or conservation-style exterior needs a timber-like line.Sliding sash windowsA stronger match for Victorian, Edwardian, and Georgian-style elevations.

Free Survey

Need help narrowing down the right window?

We can survey the openings, talk through UPVC versus aluminium, explain glazing and colour options, and leave you with a clear written quote for your home.

Compare UPVC and aluminium properlyAdvice on glazing, colour, and ventilation optionsWritten quote after a survey, not a guess

Book a free survey 020 8500 9100

Windows range

Browse Windows

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.

View details

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.

View details

Sliding Sash Windows

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

View details

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.

View details

Sash Horn Windows

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

View details

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.

View details

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.

View details

Slim aluminium frames

Aluminium Tilt & Turn Windows

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

View details

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.”

Read all reviews on Google

Questions answered