Double Diamond Quality Composite Doors

Double Diamond Doors Logo

A Diamond Composite Door from South Lakes Windows Ltd brings warmth, comfort, style and security right to your doorstep. Using the latest in composite technology, this range of elegant, high performance doors will give your home and family all the style and protection you need with very low maintenance.

It’s easy to take our Double Diamond composite doors for granted because they stay looking great year after year without any assistance from you. All your door needs is an occasional wipe with a cloth once in a while to keep it looking pristine year after year.

Diamond doors are manufactures by New World Developments Ltd who also manufacture our flagship Apeer door range.

Note: Because of South Lakes Windows commitment to ultimate quality, we only supply the DOUBLE REBATE door option.

Diamond Colour Ranges

Show off your home’s true colours on the outside, inside, rebate, frame and weather deflector of your door. Our Double Diamond range gives you a choice of colours, in either the total-door or the white-inside option.

Plus, for absolute consistency even when the door is open, Diamond carefully colour match every edge.

Colours that stay bright whatever the weather!

Standard Colour Range:

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Diamond Doors Standard Colours

Premium Colour Range:

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Diamond Doors Premium Colours

Colour match your complete door entrance system, inside and outside.

Colour choices are not restricted to white frames, or to a white only finish on the inside. Choose your door colour, match the door frames, rebate, weather deflector and internal finish.

Diamond Light

Inspirational, beautiful and the ultimate in stylish practicality, the Elegance, Simplicity, Prairie and Royale glazing options provide you with a wealth of choice to enhance your Diamond door and create a first impression that lasts.

Using hand cut bevels and textured glass pieces, the decorative glass is assembled using traditional stained glass methods, and triple glazed to give excellent insulation.

Hand crafted glazing

Backing Glass

(Not Available On RG Glass Designs)

All of the door designs featured throughout the brochure can be backed with a range of obscure glass to suit all requirements for energy efficiency, safety and privacy.

This is our standard range but we can offer more styles upon request. Please note there may be an additional charge for non standard obscure glass patterns.

Diamond Security

Every Diamond Door comes complete with the latest in anti-drill, anti-pick, anti-snap, anti-bump locks.

Diamond doors use the latest in locking technology to challenge even the most experienced criminals.

Double rebate
70mm of high density polyurethane foam with uPVC inner frame, triple glazed decorative units, extra insulation and security from a double rebate uPVC system.

Multi Point Locking System
This high security system is fitted as standard to reinforce the concept of safety in your home.

Kitemark Security Cylinder
Anti-bump, anti-drill, anti-pick and anti-snap Kitemarked cylinder lock barrels are fitted as standard.

Winkhaus Locking System
Our new range of bar pull handles operate with a Winkhaus Lock and an escutcheon plate. Classic lever lever handles are also available.

Reinforced Frame
Diamond doors are fitted into steel reinforced PVC frames for a strong secure doorset.

Flag or butt hinges can be fitted to Double Diamond doors.

Double Diamond
Double twin seal rebate for extra strength, security and insulation.

Kitemark Glass
All glass is Kitemarked toughened glass, either double or triple glazed.

GRP Skin
Both sides of our doors have 2mm fibreglass (GRP) skins which ensure a tough and durable finish with lifelike grain.

Diamond Accessories

To complement our doors, we offer a range of high quality door furniture and door hardware. All door accessories are covered by South Lakes Windows ten year guarantee.


All decorative glass designs shown in doors with the RG code are available with a choice of sidelight and toplight options as shown. Due to the unique construction of the RG glass, it is not possible to create matching sidelights or toplights.

RG glass includes: Abstract, Bullseye, Classic, Clarity, Diamond Cut, Dorchester, Elegance, Linear, Matrix, Prairie, Reflections, Royale, Simplicity, Symphony and Tahoe. Murano RG glass in all colours is available with matching sidelight and toplight.


For more information or composite door costs - Contact us NOW... It's EASY!

Call FREEPHONE 0800 917 6066 and speak to one of our super helpful staff RIGHT NOW! (Office Hours)
…Or simply use our online contact form and we will respond ASAP!

Double Glazing in Morecambe Bay, Lancs