Tel: 01268 571 055

Specialists in Steel Replacement Aluminium Windows & Doors for Listed Buildings / Conservation Areas

We supply and install Heritage steel replacement steel windows and doors for listed buildings and other conservation uses.

The areas that we service in the UK are Essex, Hertfordshire, London, Kent, Surrey, Suffolk and Cambridgeshire.

business hours

Business Hours

Monday - Friday : 8am - 4:30pm
Saturday &: Sunday : Closed

   01268 571055
   01268 571944
   info@completegroupuk.co.uk

Showroom Hours

Monday - Friday : 9am - 4pm
Saturday: 9am - 4pm
Sunday: 10am - 4pm

We have friendly, knowledgeable, advisors who will explain our products and answer your questions.

There are currently around fifty products in each showroom for you to examine and discuss.

For more details go to our showrooms page.

To visit a showroom,

showroom hours


Heritage Window Features

Royale 32.5mm frame

Royale 32.5mm frame

This aluminium window system is the slimmest thermally broken aluminium window system on the market. They have been designed as a secure and thermally efficient replacement for steel windows.

These windows look just like your old steel windows, will maintain the character and integrity of your period property and will be a great improvement on your old steel windows. They use the latest "Polyamide" thermal break barrier technology, have high security Ste'alth Secure™ Locking, which locks your windows on three sides making them as strong and resilient as steel and is still a fraction of the cost of steel windows. Due to it's high specifications these windows are suitable for new build as well as replacement and refurbishment projects.

A popular misconception is that aluminium windows cannot be as slim as steel windows, but this window system is in fact slimmer than some steel windows. The outer frame is just 32.5mm deep, making the perfect replacement for a steel window system. In the majority of cases we will not have to cut back plaster.

Key Profile Dimensions
Outerframe Depth (mm)32.5
Sash Depth (mm)40
Glazed Sealed Units (mm)24 (4 x 8 x 4)
Projection Cill height - Optional (mm)TBA
Head Extension - Optional (mm)37
Transom / Mullion - If Required (mm)8

More information on the Royale steel replacement windows

Heritage 47mm frame

Heritage 47mm frame

This aluminium Heritage window system is designed as a slim-line and thermally efficient replacement for steel windows, part of the Heritage Range it uses steel look-a-like profiles. They look just like your old steel windows, and will maintain the character and integrity of your period property. These Heritage Windows have even been approved for use in Grade II listed buildings and conservation areas and have the approval of Letchworth Garden City Heritage Foundation.

Using the latest "Polyamide" thermal break barrier technology, they have high security Stealth Secure™ Locking, which locks your windows on three sides making them as strong and resilient as steel windows at a fraction of the cost. Due to it's high specifications these windows are suitable for new build as well as replacement and refurbishment projects.

Key Profile Dimensions
Outerframe Depth (mm)47
Sash Depth (mm)56.5
Glazed Sealed Units (mm)24 (4 x 8 x 4)
Projection Cill height - Optional (mm)25
Head Extension - Optional (mm)32
Transom / Mullion - If Required (mm)50

More information on the aluminium Heritage window system

Great Prices, Great Products and Complete Satisfaction Guaranteed, call today 01268 571055 or email info@completegroup.co.uk