Bowater Doors offer a wide range of high performance composite doors expertly installed by South Lakes Windows Ltd. Bowater has been established in the UK for decades ensuring many years of experience go into everything they do. Their British-built door range is constantly evolving – ensuring that it remains one of the most secure and energy-efficient offerings in our range.

The Bowater DUO composite door has been designed with meticulous attention to detail and finished to the highest possible standard. Each door offers strength, security and style – in equal measure.



DUO Doors – Flawless Performance

Not all composite doors are the same. You need to know that you’re choosing one to last: one that offers the ultimate in security and energy efficiency.


The performance of each Bowater DUO door is fully guaranteed for ten years, but every one has been designed to look good and perform flawlessly for much longer, giving you decades of low-maintenance service.


Your front door is the first thing to greet any visitor and a well-selected door can not only improve the look of your home and increase its security and energy efficiency, it can also raise the value of your property.


Traditional timber doors may look great when they’re freshly painted or varnished, but to keep their good looks, they need refinishing every year on average. With a DUO composite door installed by South Lakes Windows Ltd, there’s none of that maintenance hassle! These composite doors look just as good (some would argue better!) and there’s no need to ever have the hassle of regular maintenance.


When you choose a Bowater DUO Composite door, you can be confident it’s weatherproof. It won’t swell in winter and shrink in summer like timber doors often do, it’s also not going to warp, twist or split. Because all Bowater Doors come fully framed with triple seals, you’ve also got no worries about nasty draughts.


You’d be amazed how much energy is lost through a badly fitted door. That’s why every Bowater DUO Composite Door has a super-efficient insulating inner core and comes with a thermally efficient threshold.


As well as keeping out the elements and street and traffic noise, all products in the Bowater Composite Door Range are designed to keep out intruders. Highly robust and highly efficient, they are equipped with Saracen Secure Hardware, including a tried and trusted mortise lock linked to a superior hook bolt system. Contact South Lakes Windows NOW to discuss your Bowater DUO composite door requirements.


Our British-built composite doors are available in an extensive range of colours, styles and woodgrain effects with a wide variety of glazing options, so… get ready to adore your door!


  • Low maintenance
  • More energy-efficient – proven by energy rating labels
  • Aesthetically pleasing
  • Highly resistant to weathering
  • Solid and robust – able to withstand any knocks and bumps
  • More secure than a traditional timber door


A stylish front door is one of the first impressions of your home – why not make yours as individual as you are?

With such a wide range of colours, styles, glazing and finishing options – you’ll probably never see another DUO door like yours.

Whether you prefer time-honoured and traditional, or contemporary and cutting-edge, you can choose a door style to suit you and your home. The choice of colour, glass, furniture and finish means there are thousands of possible combinations. You can even complement your door with matching side panels, sidelights and toplights.

The DUO door range has been designed with symmetry and style in mind; each one is finished with attention to detail and built in Britain, using the strongest, low-maintenance materials. Thanks to their extra sharp woodgrain definition, they are virtually indistinguishable from a traditional timber door, but have a range of modern advantages.

The tough GRP skin means your door will withstand any knocks and scratches, and it has been developed to withstand extreme UV testing, so it will not fade in strong sunlight.

A well-made, well-chosen door from South Lakes Windows Ltd will improve not only the appearance, but also the value of your home.


  • There is a great range of colours and styles to choose from with the DUO range
  • The low threshold option means these doors minimise a potential trip hazard and provide easy access
  • White, Rosewood or Golden Oak frames are available as standard
  • There is an exclusive range of decorative glass designs to choose from

DUO Composite Door Benefits

  • Energy-efficient – lowering your heating bills
  • 54% thicker than a standard door – leaving would-be intruders out in the cold
  • Double compression seals – improved thermal and acoustic efficiency
  • Solid and secure – all DUO doors use a multi-point locking system


Available in 7 colourways, plus the option of foils on both sides for those that prefer a woodgrain finish within their home as opposed to the standard white interior.


Every DUO door is double rebated as standard, to help you keep the heat inside where it belongs.


Not only does this help the environment, it saves money on your heating bills too. Double rebates make the weather seal much more draught-proof and effective than their single rebate equivalents.


In addition All Duo doors feature:

  • Choice of patterned backing glasses
  • High performance 50mm triple glazed unit
  • Tri-Series glazing cassette – no screw holes,
  • Availability of range of matching side panels to perfectly complement your door.


This exacting standard has been set to really to guarantee all products supplied to the consumer meet critical performance and safety criteria.


From July 2013, it is mandatory for all windows and doors to carry the ‘CE’ mark that guarantees conformity to European Standards.


This exacting standard has been set to really to guarantee all products supplied to the consumer meet critical performance and safety criteria.

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