Windows by Cii Double Glazing in Essex

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 rushed doorstep decision, no vague photo estimate, and no pressure to choose before you are ready.

Assure certified10-year guaranteeSurveyed properlyFinance available

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

Window guide

Which window style suits the house?

Most window choices come down to the look from outside, how each room needs to open, and whether the house wants a simple replacement or a more traditional finish. Pick the style first, then settle the colour, opener layout, glass, trickle vents, and any easy-clean or escape hinge details.

White replacement windows installed across the front of a house

Windows product comparison

Casement windows
Simple replacements and full-house upgrades. Choose these when you want a clean, practical window that works in most rooms.
Flush sash windows
A flatter, more traditional outside line. Choose these when standard casements look too bulky or too modern for the house.
Sliding sash windows
Victorian, Edwardian, and Georgian-style fronts. Choose these when the house suits vertical sliding windows and period proportions.
French casement windows
Clear openings without a fixed centre post. Choose these for rooms where both sides opening together gives a better view or wider access.
Tilt-and-turn windows
Easy cleaning and controlled ventilation. Choose these where inside cleaning, upper-floor access, or secure ventilation matters.
Aluminium windows
Slimmer frames and darker contemporary colours. Choose these for extensions or modern elevations where the frame line matters more than lowest cost.
Checkatrade
Job carried out on time and very professionally.
R Martin C., EN3
Trustpilot
Second time using CII for different properties. Easy process, good pricing, and the work was completed exactly as promised.
Tracey P., GB
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Questions answered

Common Questions

Where We Work

Essex, Hertfordshire & London

Based in Romford, we regularly work across Essex, North and East London, and into Hertfordshire. If you are not sure whether we cover your area, just give us a call.

Find Us

Our Workshop

Free home surveys available across our coverage area.

Areas We Cover

We Come to You

BarkingsideBasildonBillericayBishop's StortfordBrentwoodBuckhurst HillChadwell HeathChelmsfordCheshuntChigwellChingfordCollier RowDagenhamEnfieldEppingHarlowHoddesdonHornchurchIlfordIngatestoneLeigh-on-SeaLeytonstoneLoughtonOngarPotters BarRomfordShenfieldSouth WoodfordStratfordUpminsterWalthamstowWansteadWhitechapelWoodford Green

Not seeing your area? Get in touch and we will let you know if we travel to you.

Get Started Today

Ready to Transform Your Home?

Get a free, no-obligation quote from our team. We survey, advise, and install with a clear plan from first visit to final handover.

Mon-Fri 8am-6pm · No call centres · Speak directly with Ross

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