Explore the composite door range

Flick through the tabs below to view available colours, glazing options and downloadable brochures covering the full specification of our DoorCo composite door range.

Trade-ready composite front doors

Our composite doors are fabricated using DoorCo slabs, recognised across the UK for their strength, thermal efficiency and low maintenance GRP outer skin. Each door is built to the highest standards using premium materials sourced through our trusted supply chain.

We supply trade customers with composite doors specified to match the job, whether that's a new front door for a residential refurbishment or a back door for a new build. Lead times are typically two weeks.

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Variety of core options

Specify foam, solid timber core or DoorCo's hybrid GRiPCORE construction depending on budget, weight, rigidity and thermal performance requirements.

GRP outer skin

A tough Glass Reinforced Plastic skin delivers a highly durable, weather-resistant finish with no varnishing or repainting required over time.

Strong compliance

PAS 24 tested and Approved Document Q ready, suitable for new build and replacement installations across the UK.

GRiPCORE hybrid construction available

PIR foam, HDF plywood and aluminium layers combine to reduce warping and thermal movement, giving a rigid, high performance slab. Foam and timber cores also available.

Composite door specifications

Key specifications across our DoorCo composite door range.

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SpecificationDetail
Core optionsMulti-layer GRP composite slab
Core optionsFoam, solid timber core, GRiPCORE hybrid
Outer skinTough, scratchproof GRP
U-ValuesFrom 1.4 W/m²K down to 0.9 W/m²K
SecurityMulti-point locking, 3-star cylinders, PAS 24
GlazingDouble or triple glazed, clear, obscure or decorative
HardwareLever, pull bar, knockers, letterplates
ColoursStandard, woodgrain, dual colour, full RAL

Glazing and security specifications

Composite doors are available with double or triple glazed units, and a wide range of decorative glass designs from traditional bevelled patterns through to contemporary etched options. Every door is fitted with Secured by Design locks and three-star cylinder barrels as standard.

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aqua composite door

Colours and finishes

Choose from Anthracite Grey, Chartwell Green, Agate Grey, Duck Egg Blue, Black and White as standard. Woodgrain finishes including Golden Oak and Rosewood are available, alongside smooth contemporary options and the full RAL range should you prefer. 

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DoorCo White

DoorCo White

DoorCo Golden Oak

DoorCo Golden Oak

DoorCo Black

DoorCo Black

DoorCo Blue

DoorCo Blue

DoorCo Green

DoorCo Green

DoorCo Red

DoorCo Red

DoorCo Rosewood

DoorCo Rosewood

RAL option

RAL option

Brochures and downloads

Download the full DoorCo composite door brochure to view every door style, glass design and hardware option in detail, then get in touch with our trade team for pricing.

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How our composite doors are built

The outer skin is tough GRP, chosen for its weather resistance, colour stability and low maintenance finish. It resists scuffs, fading and impact, removing the need for repainting or varnishing across the lifespan of the door.

Beneath the skin sit reinforcement and core layers. You can choose a foam core for a lower price and energy efficiency, a solid timber option for a heavier premium feel with leading security, or the GRiPCORE. This option combines PIR foam, plywood and aluminium for maximum rigidity and thermal efficiency.

  • grey composite door
  • composite door at hallway
  • greyish composite door
  • greyish composite door
  • military grey composite door
  • Inox Lyon composite door

Why partner with Alpine

We have a state of the art manufacturing facility in Morley, with approaching 80 years of combined industry experience between Directors Peter and Richard. Peter started on the tools as a fitter, so we understand exactly what trade customers need from a supplier, and how to make life as easy as possible.

Every composite door is fabricated using DoorCo slabs, Secured by Design locks and three-star barrels, with glass supplied through Martindale’s and Glasscraft. Quotes returned in 24 hours, delivery typically within two weeks across Leeds, Harrogate and beyond. Delivery is free in Leeds.

Composite door FAQs

Answers to the most common questions we receive from trade customers about our DoorCo composite doors, lead times, security and specification options.

How we work with the trade

Our Process

Initial quote

Send us your sizes online or over the phone. We turn most trade quotes around within 24 hours, and there is no obligation to proceed.

Conversation

We talk through the priorities for you or your client, be it design, thermal performance, security, colour finish, glazing, or locking.

Manufacturing

We manufacture in-house at our Morley facility using Eurocell uPVC profiles, DoorCo composite slabs and Alunet aluminium systems. Typical lead time is two weeks.

Bespoke build, testing and supply

Every frame is made to your exact sizes and quality-checked before despatch. Supply only as standard, full installation available on request.

What fellow trade professionals say about us

Honest feedback from the installers, builders and double glazing companies we supply day in, day out.

"Had both front and back stable doors fitted recently, and I have to say the men that came to fit them were really good, pleasant, efficient and did a great job! I am rea...

Carol Marshall

Google
"I can’t thank the team at Alpine enough for all of the hard work on your build. They were great from the start, being really helpful through the quote process and in adv...

Kate Oakes

Trustpilot
"We recently renovated a small cottage and needed to consider the traditional look and feel of the property, Alpine Windows and Doors were brilliant, listening to our req...

Tom Crowe

Google
"Excellent service from start to finish. They made the process from colours to design easy, nothing was too much trouble. Lovely polite staff and fitters. Fitters turned ...

Sarah Wood

Google
"Peter at Alpine has done the windows and doors at both our offices and my home. The service was very professional, fast and competitive price wise. I had a combination o...

SMILE Air Conditioning

SMILE Air Conditioning

Trustpilot
    A modern dining and living space featuring floor-to-ceiling dark frame glass doors with built-in blinds overlooking a backyard garden.