Stable View Light - Rockdoor Composite Door

Diamond Stable Composite Door

The Rockdoor range of composite doors offers strength, security and thermal efficiency to help to protect and insulate your home.

Stable Diamond by Rockdoor

Strong, secure and thermally efficient

Our Diamond Stable doors are undoubtably a stunning design. Perfectly suited to a range of homes that are looking for a new composite door that provides style, security and excellent thermal efficiency alongside practicality.

Our Diamond Stable doors are a great way to let fresh air circulate the home whilst keeping pets and children safely inside. Simply open the top segment of the door to let air flow through your home whilst keeping the bottom segment closed ensuring pets and children are safely inside.

Our range of Diamond Stable doors features the same innovative technologies as our other door styles including S-Glaze technology, a 50mm thick sash, an Ion gasket and an aluminium-reinforced inner frame encapsulated in PVC-U and high-density polyurethane foam. All our stable doors also feature a custom made centre seal to ensure the door seals perfectly.

Choose your Stable Diamond composite door colour

Here you can see the full range of colours the Rockdoor Diamond Stable composite door is available in, to give you inspiration for designing your new door. Please note, that the doors shown below can be further customised with a choice of frame colours, glass designs and door furniture.

Anthracite Grey
Slate Grey
Agate Grey
Pebble Grey
Chartwell Green
Emerald Green
Sapphire Blue
Light Oak
Irish Oak

Get the Stable Diamond composite door expertly fitted by trusted installers

Found a colour for your new Stable Diamond composite door that would look perfect fitted to your home? You can now find expert composite door installers local to you right here on our website, that have been trained by Rockdoor to ensure your new composite door is expertly fitted.

Get Your Diamond Stable Composite door expertly installed by our Trusted Installers

To ensure your new Diamond Stable door performs as it should we always recommend using an Installer from our network of Trusted Installers.

Each Installer in our network of Trusted Installers has been through extensive training to ensure each and every door they install is fitted correctly eliminating the issue of problems arising later down the line.

All Rockdoors are made to measure, therefore an installer will need to do a free, no obligations door survey to ensure the door fits perfectly and answer any questions you might have about the Diamond Stable Door. Find your local Rockdoor Installer today.


Hopefully, you found the right door style to suit your home…

If you’re happy with your choice of the Diamond Stable Rockdoor, it’s a great choice after all. The next step is to use our online door designer tool to truly make this door your own, before talking to your local trusted door installer about the additional options available to you before your new door is manufactured and installed.

But what if you’re still undecided? Not to worry, take a look at our customer doors gallery, or browse other stable door options or explore our all composite door styles.

Reasons to Choose a Rockdoor

Core Benefits

Rockdoors inner strength is unsurpassed thanks to a combination of a 360° aluminium reinforced inner frame and high-density thermally efficient PU foam. Customers can also choose steel mesh reinforcing for the ultimate in security.

£2,000 Guarantee

Our lock cylinders are burglar proof. A TSOO7 3 star rating, SS 312 Sold Secure Diamond Standard and Secured by Design accreditation see to that, plus our £2,000 security guarantee.

Forced Entry

Rockdoors are designed for strength, it is in our DNA. For over 25 years, we have led the way in composite door development to ensure our doors protect homes and families from unwanted intruders and forced entry.

Hook up with Rockdoor

Strong sintered steel multi point hook locks with a 25mm throw, securely attach the door to the frame to ensure it cannot be forcibly opened by burglars whilst ensuring a better sound and weatherproof seal.

Glass Leading Security

Rockdoors feature S Glaze technology, meaning your glass is locked into your door for life, for added security. It also means no glazing cassettes are used which are prone to fading and discolouration.

Stronger, it's Official!

Rockdoor is consistently found to be one of the most secure doors available in the UK, studies show that a Rockdoor is 35% stronger than a typical GRP door.

Create your own Rockdoor now and get it expertly fitted

Rockdoor 3D door designer

Awards and accreditations