uPVC, Aluminium and Hardwood



uPVC, Aluminium and Hardwood



uPVC, Aluminium and Hardwood

Windows & Window Installation in Hertfordshire & Buckinghamshire

You might think that all double glazing is the same with standard UPVC windows and doors being pretty much the only choice out there. But double glazing is no more the same than any dwelling is identical. Just consider the wealth of architecture that the UK has with not only modern new builds but Victorian townhouses, quaint country cottages, stylish apartments, listed Georgian properties, converted barns and so on. Some of these homes would look out of place with UPVC windows and doors so double glazing manufacturers now offer a wide range of double glazing types to suit your individual property.

Various Window Types

SDM Doors & Windows supply and fit & a variety of window types, some of which are listed below. All our windows are of the highest quality and fitted to industry standard.

  • uPVC windows
  • Aluminium window
  • Hardwood windows
  • Sash casement windows
  • Bay window
  • Flush casement windows


UPVC windows remain a firm favourite with many people as it offers high performance and low maintenance, that’s firmly within reach of any budget.

With over 30 fade resistant shades to choose from, the days of being restricted to basic white UPVC frames are over. From classic cream to contemporary Anthracite Grey frames, maybe a natural woodgrain finish is more to your taste. Combined with energy efficient double or triple glazing, our uPVC windows notably increase warmth, peace and style.


These flexible windows have very practical uses thanks to their dual hinge system which allows the window to either open inwards from the side, like a traditional window or from the top, making the job of cleaning your windows a very simple process.

Families with small children will appreciate the security aspect that Tilt and Turn windows enjoy as you can tilt the windows just a fraction, to allow air to circulate but also preventing the window from being opened any wider by curious children.

Larger houses again suit Tilt and Turn windows for maximum light exposure and once again, these windows can be adapted to suit your home with a choice of frames and sizes.


Bay windows project outwards from the main walls of the room, and can be installed with any combination of window panes. Providing a sophisticated curved or angular aesthetic from the outside, they’ll add additional living space which can be used as a cosy indoor seating nook or window area to display photos and ornaments, whilst letting in plenty of natural light too.


Our aluminium windows today are the result of continual development to improve aesthetics, strength, security, thermal efficiency and longevity. We recognise that today’s homeowners are concerned about environmental issues. Our focus on materials with sustainable credentials has helped us to develop replacement aluminium windows that can meet increasingly tough environmental standards.

The advantages of the latest aluminium framed windows are strength, durability, elegance and high thermal efficiency. Aluminium window frames allow light to flood into your property from even the smallest window, whilst offering the peace of mind of enhanced high secure. The aluminium windows we install have been made to the highest possible standards to ensure that your home will benefit from the some of the best energy rated aluminium windows on the market

We offer a huge range of stock colours and finishes on our windows. Choose from many different RAL colours to match your property perfectly. We can offer bespoke colours to match the most unusual property styles and designs. Our aluminium window systems can be ordered in dual colours, allowing a different finish on both the inside and outside frames. As well as our standard painted finishes, we can also offer stunning sublimated woodgrain effects.


St Albans







North London

High Wycombe


Leighton Buzzard

Welwyn Garden City




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