Windows
From slim-profile aluminium to classic UPVC, we supply and install windows across Essex and East London.
Learn moreWhat We Do
Windows, Doors & Roof Lanterns in Essex
From a single replacement window to a full home transformation. Cii Double Glazing handles supply, delivery, and installation entirely in-house.
Cii Double Glazing is a family run installer based in Romford, Essex, supplying and fitting windows, doors and roof lanterns across Essex, East London, Hertfordshire and North London. Every job is handled by our directly employed team. We do not use subcontractors, and the same people who quote your project are the ones who come back to install it.
Our product range covers UPVC and aluminium windows in eight different styles, composite and UPVC front doors, aluminium bi-fold and sliding patio doors, French doors, stable doors, and a full range of Maxi roof lanterns and flat rooflights. Every frame is made to measure, every window profile is A+ rated, and every Secured by Design installation is backed by our break-in promise.
Alongside new installations we also carry out repairs: misted or blown glass, failed seals, broken handles, hinges, and hardware faults. And for builders, contractors and developers, our trade service offers direct supply, trade pricing and no minimum orders, with no call centres between you and the team.
Every quote starts with a free survey and a clear written price. No hidden fees, no sales pressure, no surprise extras after the work has started. If you are looking for a double glazing installer in Essex who picks up the phone and stands behind their own work, that is who we are.
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Priority window, door, and repair pages
If you are comparing options, these are the core service routes we usually recommend reading first. They explain the main decisions before a survey: window style, door opening type, repair suitability, specification detail, and how each installation is planned.
