Rockdoors: why security-focused homeowners are switching

Simon Edward • 20 July 2026

Are you looking for a door that's exceptionally hard to break through? Learn why Rockdoors are the top choice of many UK homeowners.



Are you looking for a door that's exceptionally hard to break through? Learn why Rockdoors are the top choice of many UK homeowners.

You don't need us to tell you the importance of home security. Many homeowners see it as a priority and invest in innovative tech accordingly. But while sensors, smart doorbells and the like can make a positive difference, you shouldn't overlook the humble door.


Doors are more secure than ever. This is partly down to the standardisation of multi-point locking systems and an increasing uptake of composite doors.


Now, a new and even more secure door is on the market: the Rockdoor.


Where a traditional composite door has a foam core and PVC skin, Rockdoors have a glass-reinforced plastic skin, a solid core and internal reinforcement plates.


This unique construction makes Rockdoors exceptionally hard to break through. But a Rockdoor is far from just a tough cookie. It also has all the qualities homeowners look for in composite doors: it helps insulate the property, it locks securely and it's easy on the eye.


What are Rockdoors made from?

Rockdoors are made from three main components. First, there's a glass-reinforced plastic outer skin. This is manufactured to stay firm against cuts and blows.


Next, there's a solid polyurethane core. This fills the entire door slab, leaving no air gaps. And at the lock and hinge points, there are sturdy internal reinforcement plates.


On top of this, Rockdoors are fitted with security glazing beads, multi-point locking and Chubb locks for your peace of mind.


The product is accredited by Secured by Design, the UK police's security initiative that seeks to "design out crime" through high-level building security standards.


As you can see, security informs every aspect of the Rockdoor's design. So, how can you be sure that it does the job? The answer lies in its comprehensive testing.


How are Rockdoors tested?


Picture of someone making notes during a test.



The security and durability of Rockdoors isn't just on the manufacturer's say-so. They're extensively tested for security and durability, and tests show they're around 35% stronger than standard composite doors.


Before reaching the market, they're rigorously tested for forced entry. This includes the use of high-security three-star cylinders, TS007 standards and multi-point hook locks.


Rockdoor is justifiably proud of these results and has made them public. They demonstrate conclusively that their doors withstand serious attack better than standard composite, uPVC and timber doors.


The complete package

The main selling point of Rockdoors is their capacity to withstand manual attack. But they're far from a one-trick pony.


Rockdoors are also thermally efficient and weather-sealed – two attributes that many homeowners look for when researching and purchasing doors.


They're also available in a wide range of colours, meaning homeowners can buy a Rockdoor that matches the personality and aesthetic of their home.


What's more, Rockdoors come with comprehensive warranties. That includes:

  • A 10-year guarantee on the door leaf, outer frame and sealed glazing units
  • A five-year warranty on locking mechanisms and side-frame profiles
  • A £2,000 guarantee against lock snapping

Finally, Rockdoors are easy to clean. You only need to wipe them with warm soapy water, making sure to avoid abrasive cleaners that can damage the outer skin.


When should you get a Rockdoor?

Rockdoors are the door of choice when security is your top priority.


We say "top priority" because our other composite doors are also highly secure and come in an even wider range of design options. But if security is number one, you can't do better than a Rockdoor.


Rockdoors are often installed in village homes, farmhouses, rural plots and other isolated properties. This can provide peace of mind for homeowners and farmers who are far from neighbours and emergency services.


They're also increasingly purchased by security-conscious landlords and homeowners. It could be that the property has been broken into before or is located in an area vulnerable to break-ins.


It could be a buy-to-let property or HMO that needs security doors. Or it could simply be that the property owners are putting home security at the top of the agenda.


Finally, Rockdoors are sometimes fitted to meet insurance requirements. That's because some home insurers offer discounts for properties fitted with doors that meet Secured by Design standards. Rockdoors fit the bill, making them attractive for some insurance policyholders.


What design options do Rockdoors have?


Picture of a Rockdoor.

Rockdoors come in a variety of designs. Customers get to choose the style and colour of the slab, the type of glass panel and the hardware used.


In terms of glass, you can choose between clear, obscured, decorative, stained-effect, leaded and etched glass, depending on your aesthetic vision and privacy requirements.


Hardware, too, can be specified to blend with the overall look of your property. Homeowners can choose from letter plates, handles, spyholes, knockers and numerals in chrome, brushed stainless, black, gold, antique bronze or polished brass.


And in terms of colour, you can choose between 14 shades. Popular choices are anthracite grey, Chartwell green, duck egg blue, rosewood, Irish oak, black, red and cream. Moreover, most Rockdoors can come with one colour on the inside and another on the outside.


Can you get a Rockdoor with a cat flap?

It's possible to retrofit a cat flap, but it will invalidate the guarantee. For this reason, Rockdoor advises that you ask your installer to add a cat flap to your quote.


Rockdoors from Calder Windows

Here at Calder Windows, we've supplied and installed doors and windows for decades – and we're now proud to be an authorised installer of Rockdoor composite doors.


Rockdoor, you see, sells through approved installers rather than directly to homeowners. Installation, too, is carried out by independent installers. 


If you're in Yorkshire, trust us to install a Rockdoor with a timely, professional service. If security is your top priority, we're sure you won't look back.


To get started, contact our friendly team to book a free appointment. We'll chat about your needs and provide a quick, honest quote for the work.


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