Rockdoor Ltd manufactures Composite Doors (including Front Doors and Back Doors), Stable Doors and French Doors to individual specifications, in a highly automated high tech production plant in Lancashire.

Established in 1996 Rockdoor has been instrumental in the development of composite doors, leading the way in style, innovation and security. To this date, they have produced almost half a million doors from their high-tech manufacturing facility in Lancashire.

Rockdoors are tailor-made from scratch for the ultimate in strength, with each door being manufactured to your exact requirements here in the UK.

Their vast collection of composite doors are thoughtfully designed to suit many different tastes and property styles. The range features many individual door styles, from the contemporary to the traditional, and includes the market leading Rockdoor Stable door and French doors.

For Rockdoor UPVC Composite Doors in Lancashire, Cumbria & Yorkshire Contact South Lakes Windows Ltd for more Rockdoor composite door Information.



Rockdoor Ultimate looks superb on any style of property. Ultra-high security German engineered locks and a Carbon Fibre reinforced frame, makes the Ultimate Series the strongest composite door available.

An Inner Strength

This illustration provides an interesting insight into what goes on under the surface of a Rockdoor. Innovation and engineering expertise in composite door development, backed by attention to detail will go a long way to ensuring you and your family’s security. All expertly installed by South Lakes Windows Ltd experienced door fitters.

Rockdoors are designed to be as secure as possible. Multipoint locks, steel drill plates, cylinder protectors, outer & inner frame reinforcing and anti-bumping cylinders provide complete peace of mind.

Rockdoor is made with a unique engineered door system ‘made to measure’ for strength, not ‘cut to fit’ which weakens the door. It is designed with a bespoke reinforced inner & outer frame, specially designed to hold all the components including locks, deadbolts & hinges.

Rockdoor is the most thermally efficient door available with an entire Series available with an A-Rating for thermal performance. Press glazed technology, sash thickness, PU foam, PVC-U skins and thermally efficient soft coat glass are used to achieve an A-Rating.

Rockdoors are manufactured from high impact PVC-U to match windows. All coloured/wood doors are protected by Heat Shield technology meaning your door won’t crack, bend or warp.

PVC-U is low maintenance and only requires an occasional wipe down with warm soapy water. As a Rockdoor contains no wood, it’s impervious to water meaning it won’t swell.

German engineered hook locks exclusive to Rockdoor. Made from steel and brass for ultimate strength & security.

Toughened glass units filled with Argon Gas to provide the most thermally efficient door available.

An industry first, Rockdoors Carbon Fibre reinforced inner frame makes it the strongest door frame on the market.

Secured by Design Cylinder, anti-bump and anti pick manufactured to British Standards 1303.

Zinc cylinder guard protector to stop lock barrels from being snapped.

Concealed & reinforced steel drill plates prevent locks from being drilled out by thieves.

The door skeleton is welded together and is impervious to moisture ensuring it won’t swell or rot.

Brass hook locks engage into full length steel keeps to prevent forced entry.

Outerframe features a reinforced thermal block for strength and thermal efficiency.

Provides the strongest fixing points available when installing the door.

Multi Chambered, insulated outer frame for high levels of thermal performance.

No cassettes giving greater resistance to glass removal, perfect colour match and no air or water leakage.

Thick & tough 3mm skins both internally and externally resist cutting and impact.

Engineered 3 way adjustable hinges secured into the Carbon Fibre frame for extra strength.

Opens to 180° for convenient and safe day to day use, and comes with integral brush strip for thermal efficiency.

A unique and optional welded steel mesh security system can increase the strength of your Rockdoor by 4 times.

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