Composite Doors from Colins Sash Windows

A composite door speaks volumes about a property. Now you can make even more of a statement with our range of contemporary furniture suites which can transform a front door into a real property feature.

Choose from the Long Bar handle suite, the ultra-modern Square suite, the elegant Bow Handle suite, or the timeless Classic suite, available to order here.

The composite door can be as individual as you like. Three new door colours; Poppy Red, Duck Egg Blue and Black Brown, have added to our existing ten; White, Black, Blue, Red, Green, Oak, Darkwood, Cream, Grey and Chartwell Green.

Choice of Colours for composite doors

We also offer colour all round options, and 9 frame colours – white, mahogany, cherrywood, oak, white grain, brown–black, grey, cream and chartwell green – to compliment your new door colour. All of which can be configured with gold, chrome, black, white and contemporary hardware; it’s easy to see how there are over 900 billion types of Door-Stop door.

Eco Friendly Composite Doors

We’ve always been ahead when it comes to taking responsibility for the planet.

From day one we chose to use a calcium zinc based compound in the extrusion of the door frame (which we make in different lengths to avoid waste) because it’s much kinder to the planet than lead based additives.

The door’s inner rigid foam system is completely, utterly, one hundred percent CFC-free.

Energy Saving Certificates

All composite doors are rated by The British Fenestration Rating Council, which introduced the DER scheme in September 2011. Door-Stop supplied the first ever energy rated door and the first ‘A’ energy rated door.

New energy regulations for composite doors mean all door manufacturers and resellers will have to prove compliance. A generic certificate for certain door ‘types’ is unlikely to suffice. Using a calculation method verified by the Building Research Establishment and BFRC each and every Door-Stop composite door comes with a unique energy rating certificate, delivered immediately at the point of order.

This is not a type test or a dubious assurance that gives all composite doors the same U-value. It is tailored for each particular door configuration.

Door & side panel construction

GRP compression moulded skins. Choice of external colour, white internal. Polyurethane thermally insulated core. ODP = 0. GWP < 5

Locking mechanism

A choice of Yale, Fab & Fix or Affinity multipoint locks. All Secured by Design standard. Stainless steel austenitic face plate. Inward opening doors tested to BS6375 & PAS024. Fully adjustable keepsets, integral latch snib.

PVC outer frame

Dedicated 70mm fully welded chamfered composite door outerframe specifically designed to work with 44mm door leafs Energy efficient recycled reinforcement. Top box construction One piece door frame with dedicated composite door transom bar.

Door slab edging

2mm PVC white edging with ash grain effect embossing on hinge side Aluminium edge-band on lock side Trimmed and radiused edges to match door leaf. CNC routed to match radius of lock faceplate and hinges.

Glazing cassette

Colour matched reglazable cassette.

Hardware colour

Fully suited in gold, chrome and black.

Handle type

Lever/Lever colour suited to hardware selection.

Hinge type

Adjustable in 2 dimensions or 3 dimensions depending on hardware choice.

Weather performance

BS6375 on inward opening doors BSI Kitemark if flag hinges upgrade is chosen.

Security rating

PAS024 on inward opening doors BSI kitemark if flag hinges upgrade is chosen Q-Mark accreditation

Number of keys 3 Glass

24mm double glazed toughened sealed units. 28mm Low E sealed units used in top boxes and fully glazed panels

Standard cylinder

Conforms to PAS024:1999. Anti-bump Complies to Secured by Design Tested to BS EN 1303:2005 Available in nickel and brass


The manufacturing tolerances for composite doors and/or Side panels are compliant with the British Standard requirements of +/- 3mm.


Hardware / Furniture

A choice of Yale, Fab & Fix or Affinity fully suited hardware and furniture.

Letterplate construction

All metal faceplates and surrounds, suited to match other furniture.

Low threshold

Aluminium part ‘M’ compliant with thermal break and available in white, brown and caramel

Extension profile

Available colour matched in measurements of 15mm, 25mm and 50mm

Fixed hinges

Fixed position butt hinges available.

Lever pad handle

Lever/pad and lever split spindle options available, suited to match other furniture

Maintaining your composite doors

Composite Door-Stop doors are low maintenance – you’ll find a little care every six months goes a very long way.

Part of the door Recommended Maintenance Notes
Hindges Keep them at their best by lubricating with a little light engineering oil, e.g. 3 in 1
Cylinder Locks Need lubricating with Teflon based lubricant. They're sensitive so don't use oil or graphite powder
Hardware (handles and knockers) Just add a touch of light engineering oil on all moving parts. Especially important if you live near the coaster or by a building or industrial site.

Cleaning your composite doors

Your composite door will stay in top condition with just one clean a month.

Here’s how to care for each part of your door.

Path of the Door Cleaning Finishing
Door Leaf Keep the grime and grit away with warm soapy water (not washing up liquid) and wipe with a soft cloth.
Door Frame Wash with warm soapy water. Stubborn stains demand a specialised PVC-U cleaner. Read the cleaner's guidelines carefully.
External Glass Wash with warm soapy water with soft cloth. Finish with a proprietary glass cleaner.
Leaded Glass Wash with warm soapy water. Finish with a proprietary glass cleaner. (Oxidisation will naturally occur over time.)
Hardware (handlers, knockers) Take a clean cloth and warm water with a mild detergent, then simply wipe clean to a shine.

Design Your Own Door