Upvc Composite Doors - Lancaster based Double Glazing
Composite external entrance doors from our High Quality Duo Plus range...
The Duo is designed with meticulous
attention to every detail and finished
to the highest possible standard.
Your front door is a symbol of your home, your family and your life. It's as individual as you are. It says a lot about you. Which is why it's so important that when you choose a new door, it has to be exactly right. Not just nearly right. After all, it's going to be with you for years to come. So it's something you're going to want to cherish. To adore.
It's going to keep you, your family and possessions safe and sound. It's going to keep out the cold and wet, yet keep in the warmth. It's going to be as good looking in 10 years time as it is on the day it's installed.
So take your time in making the right decision and make certain it's one that you don't regret. Choose a Duo Composite Door and get ready to adore your door from the moment it arrives.
Composite Doors
Choose a UPVC Composite Door from the selection on the left to view more details...

Lancaster Composite Doors - Carnforth Composite Doors - Morecambe Composite Doors - Kendal Composite Doors
UPVC Composite Doors in Lancashire & Cumbria

SAVE MONEY! Energy Efficient UPVC Composite Doors
Every Composite Duo Door is double rebated as standard. By fitting a double rebate to every external door, we're helping you to stay warm. And helping the environment. It makes the weather seals much more draught proof and effective than their single rebate equivalents. So you get to keep more expensive heat on the inside, whilst keeping more cold weather on the outside.
What's more, the high density central core of each door provides excellent acoustic and insulation qualities, helping to keep even more of the heat in than standard infill doors and achieving the highest ratings of any door on the market. All of which adds up to lower energy bills. Something that we all want!
Composite entrance doors pass the latest PAS23 standard, a measurement of resistance to air and water penetration, at the highest level.
Duo Plus PVCu composite doors are fitted with ultra-secure multipoint locking systems.
All Duo doors are 68mm thick. Their ultra-strong GRP skins, combined with an extra-strong multipoint locking system provide the highest level of security and deliver total piece of mind. The doors are 50% thicker than most competitors. Duo Composite Doors are fitted with high security, multi-point door locks and adjustable flag hinges as standard.
Within the context of security and piece of mind, you and your family can rest assured and feel safe behind the unique Duo Plus multi-point lock. For your security, all Duo Plus doors are fitted with a unique 12 point multilock. Simply by lifting the handle upwards all 12 lock features are engaged.
- 2 x top and bottom shoot bolts.
- 3 x outer/inner facing hook locks.
- 2 x dead-locks.
- 1 x centre locking latch.
- 4 or 6 x roller cams (Dependant on door height)
The all round security is complemented further by 3 high security hinges that include anti-lift properties, together with the subtle sight lines similar to that of a butt hinge.
High Security Cylinder Lock
Finally, the Duo Plus high security entrance door is fitted with the unique Magnum Superior cylinder and then key locked shut. The Magnum Superior cylinder is Kite marked and surpasses all of today's security requirements and cannot be drilled, picked, bumped or snapped and for your convenience all ultimate doors are supplied with 5 keys as standard.
From start to finish Duo Doors are designed, developed, manufactured and installed to meet or exceed all current British standards. Doors pass the PAS24 security standard, which measures resistance against forced mechanical and human entry. (Also weather performance PAS23 standards.)
South Lakes Windows Duo Composite Doors are Secured by Design - the official police security initiative.
The Secured By Design standard is recognised by the Association of British Insurers.
High Security - High Performance Hardware
The doors achieve PAS23 and PAS24, the latest and most stringent BSI security and weather performance standards.
No Warping!
They're thicker than nearly every other door on the market and there's no timber involved in their construction, so there's no risk of warping.
UV Stable Tested
Doors are tested to withstand extreme sunlight conditions and are UV stability guaranteed to 10 years.
Threshold
Optional aluminium low thresholds are available at 15mm(Part 'M Compliant) for easier wheelchair/pram access or 30mm heights.Environmental Considerations
Our products are environmentally friendly. We use CFC free polyurethane foam for the inner core and a timber free construction throughout. Manufactured under ISO 14001 Environmental Management System licence. All extruded components are sourced in the UK.
You'd expect a Composite Duo Plus Door from South Lakes Windows to last a long time...
We guarantee that it will!
Composite Door Colours
Our GRP 'through colour' doors are available in a choice of 8 colour finishes including black (beck brown) and white.

Door furniture
Add the finishing touches to your door by choosing from a complete range of matching quality door handles, letterplates, urn knockers, spyholes, security chain and numerals in gold and chrome effect finish.
To complement your new Duo Plus
entrance door and your existing interior
decor you may choose from a range of 4
hardware finishes; white, brass, chrome
and black.
These solid zinc handles are contemporary
in design and will enhance the appearance
of all doors regardless of colour and
design.
Brass and Chrome colour options both
have a lacquer finish that will help
prevent corrosion, especially around
coastal areas.

With a DuoGuard composite door there’s no need to compromise.
Its unique double rebate and 12 locking points combine to provide unrivalled protection against flooding and break in – in fact it reduces water ingress by 99.5% when compared to a standard single rebate entrance door.
And with a comprehensive range of styles, high quality furniture, glazing and colour options, it’s as unique as your customers!
- Class leading security
- Enhanced protection against flooding
- Improved heat and sound insulation
- Finished to your specification
- Individually made to measure
Energy efficiency, innovation and sustainability.
With a choice of new front door styles and colours that can be complemented by a wide range of glazing styles and high quality furniture, you’ll find that you can create the perfect entrance door for every home.
- 70 mm steel reinforced door frame
- PVC-U full steel reinforced substrate
- Double seal weather performance
- Colourfast, high grain definition
- Timber-free, warp-free construction
- 68mm thickness
- High security 12 point locking system
- 6 pin anti-drill/anti-bump euro cylinder
- High security hinges
- Fitted with extended lever (DDA) handles
Elegant UPVC Composite Doors
With its wide range of colours, styles, glazing and finish options, you'll probably never see another Duo door the same as yours. Duo doors are created with symmetry and proportion in mind, finished with attention to detail, built using the strongest, low-maintenance materials available, and will enhance the appearance and character of any home, whether contemporary or modern.
The combination of colour, glass, furniture and finish means that there are over one and a half million options from which you can choose your perfect door. One that's not only elegant but also individual. Stunning.
You can complement your door with side panels or, for the wider entrance, sidelights and toplights. A Duo door looks as perfect in a leafy rural parish as it does in a busy city street.
Confidence in your New Composite Door
With a thick skin of ultra-hard wearing Glass Reinforced Plastic, your Duo Plus exterior entrance door will perform just as you'd expect. Or better.
All Duo external composite doors are manufactured to the highest standards in our factory in the UK, using only the highest-grade materials. Their performance is fully guaranteed for 10 years but designed to last for over a quarter of a century.
The high quality sub-frame is individually constructed to match every door size exactly, and combines strength and stability with sturdy joints locking everything tightly in place.
What's more, they're produced in an environmentally responsible manner using renewable resources and low energy processes, with factory waste kept to a minimum and recycling employed where possible. Every Duo door is a "green" door.
It is not every day that you invest in a new front entrance door. So it's vital that you choose a front door that you can trust. One that gives you and your family peace of mind. One that will stay looking good for years to come. Duo. The only door you'll ever need.
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