Made in Britain
Made In Britain 30+ years manufacturing
Windows & Doors Sold
250,000+ Windows & Doors Sold Trusted by homeowners & trade alike
Great Prices
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Prices starting from only
£510.00

All our prices include VAT

Fully customisablecomposite doors
10 yearguarantee
Trusted by thousandsof happy customers
Available for fast UK delivery

Choose our composite door style and get an instant price

Traditional Contemporary Designer

Inspired by classic British architecture, featuring woodgrain finishes, panelled detailing and timeless proportions.

Minimalist styling with clean lines, flush designs and subtle glazing for a sleek modern look.

Exclusive styles with advanced finishes and bold glazing, combining smooth or etched detailing for architectural impact.

View all composite door styles

Each style can be customised with:

  • Standard GRP or GRiPCORE slab options
  • Decorative or privacy glazing
  • Colour finishes and side panels
  • Hardware and threshold upgrades

Order your composite door in 3 easy steps

Designing and ordering your factory-direct composite door is straightforward with our online door designer.

1. Choose your composite door style & size

Choose your door style, enter your dimensions and add side panels or toplights if needed.

2. Use our door designer & get an instant price

Customise colours, glazing and hardware with instant GRP and GRiPCORE pricing.

3. Secure Checkout & Direct Delivery

Order online and have your modern composite door delivered UK wide by our own fleet.


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Two core options. One perfect composite door.

We offer two composite door constructions, each built with a solid 44mm thick slab, giving you the choice between a traditional foam insulated core and an advanced hybrid core.

Every composite front door is manufactured in-house to your exact dimensions, then paired with our Heritage 2800 UPVC frame system for strength and durability.

GRP composite doors
A high-performance insulated foam core delivering excellent durability and value.

GRiPCORE composite doors
An advanced hybrid core engineered for increased rigidity and a more solid, premium feel. Over 185 door styles are available across both options, so you can simply choose your preferred design and performance level.

GRP composite doors

Our standard GRP composite doors feature a durable glass-reinforced plastic outer skin bonded to a foam-insulated core for reliable strength and performance.

GRP construction

  • Insulated reinforced core – Designed to provide thermal efficiency and structural stability.

  • Durable GRP outer skin – Weather resistant finish available in realistic woodgrain or smooth styles.

  • Laminated internal reinforcement – Adds strength and helps maintain long-term shape retention.

Why choose GRP for composite exterior doors?

  • Proven composite door construction

  • Strong thermal and weather performance

  • Lighter weight, ideal for DIY installation

  • Excellent balance of performance and value

GRiPCORE composite doors

GRiPCORE is a next-generation hybrid composite door slab engineered for enhanced rigidity and performance.


GRiPCORE construction

  • PIR foam insulation – Provides effective thermal insulation to help improve energy efficiency.

  • HDF sheets for rigidity – High density fibreboard layers that enhance structural strength and overall door stability.

  • Aluminium layer for added stability – Reinforced aluminium sheet that improves rigidity and helps reduce thermal movement.

  • Exterior grade plywood reinforcement – Strong timber layer that supports the core and adds long term durability.

  • Durable GRP outer skin – Tough, weather resistant glass reinforced plastic finish designed to resist cracking, warping and fading.

Why choose GRiPCORE for composite exterior doors?

  • Hybrid core engineered for additional strength

  • Enhanced thermal performance and an improved U-Value

  • More solid, premium closing feel

  • Performance focused construction

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Expert Insight

Consider this when choosing your composite door

quotation mark

When comparing composite doors, it's important to look beyond colour and style options and consider how the door is constructed. Standard GRP composite doors are a popular choice for homeowners seeking excellent value, offering significant improvements in security, insulation and durability compared to a standard UPVC door.

GRiPCORE composite doors take this a step further, using advanced skin technology to deliver a more authentic, premium feel alongside exceptional durability. This combination of aesthetics, resilience and long-term performance makes GRiPCORE an increasingly popular choice for homeowners looking for a premium entrance door

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Image of Operations Director

Dan Richards

Operations Director

at Modern UPVC Windows

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Dan works closely with the manufacturing and installation teams, bringing hands-on knowledge of window and door performance, product quality and practical specification requirements.

Why choose our composite front doors?

Built for strength & security

Every composite front door is engineered for strength and security, combining reinforced slabs with our Heritage 2800 UPVC frame system.

Doors feature an ERA multi-point lock with twin high-security hooks for anti-separation resistance. For enhanced protection, upgrade to the Ultion anti-snap cylinder, featuring anti-pick, anti-bump and anti-drill technology, plus KeyControl to help prevent unauthorised key copying.

Ultion cylinders also include a thicker precision-cut key for added resistance and a £5,000 guarantee when registered. Terms apply.

Price match on composite doors

We offer factory-direct pricing without compromising on quality. Our modern composite doors are manufactured in-house using premium materials and durable GRP finishes.

Design your door online and receive an instant price. If you find a like-for-like composite door for less, we’ll match it.*

*Terms & conditions apply.

Made to measure composite doors with guarantees

Engineered for strength, stability and long-term performance, each door is supported by comprehensive guarantees:

  • 10 year guarantee on GRP and GRiPCORE composite door slabs, UPVC frames and sealed glass units

  • 5 year guarantee on internal blinds and UPVC panels, with 2 years on external blind mechanisms and astragal bars

  • 20 year surface finish and 10 year mechanical guarantee on selected GreenteQ hardware

  • 25 year surface finish guarantee and 10 year mechanical guarantee on ArchiteQ and GreenteQ pull handles

What are the delivery & installation options?

To suit your needs, we offer flexible delivery for our French windows across the UK and installation options throughout the Midlands.

Choose what works for you:
  • Delivery only: Windows shipped straight to your door using our delivery fleet.

  • Expert installation: Includes survey, removal and recycling of old units.

  • Warehouse collection: Pick up your order from our local warehouse.

Customise your composite front door

Customise your made to measure composite front door with glazing, colours, hardware and side panel options.

Hardware and security options

Glazing: Our standard is ultra-efficient A+ rated double glazing, with the option to upgrade to A++ triple glazing. Select from toughened, laminated or acoustic safety glass for added strength and performance.

Integral blinds: Enjoy blinds sealed securely inside your window units, available in cordless, dual sided and corded styles for a neat, convenient solution.


Handles & accessories: Personalise your French windows with a variety of handle finishes and hardware to complement your décor.


Obscure glazing: Maintain privacy without sacrificing light with choices like frosted, textured, patterned or decorative obscure glass.


Decorative bars: Add character with Georgian, astragal or traditional lead bars, offered in multiple designs to enhance your window's look.


Window restrictors: Improve safety by limiting how far the window opens, giving you extra peace of mind.

Composite door colours

Choose from a broad range of finishes to suit your home.

Standard colours Premium colours

Popular shades suitable for both traditional and modern properties.

Higher specification finishes for enhanced kerb appeal.

Bespoke colour matching

Colour match your composite door to create a truly personalised entrance, with finishes available to match almost any RAL reference, paint swatch or brand colour.

Decorative composite door glazing

Enhance your entrance with decorative or privacy glazing. Choose patterned, etched or clear glass with sidelight and toplight options.

Glazing units vary depending on the door style, with laminated glass supplied as standard to meet Approved Document Q requirements.


Glass frame options

  • Grained - A classic woodgrain finish with subtle detailing, ideal for traditional and heritage style doors.

  • Stipple - A clean, squared profile with a smooth stippled finish for a modern, understated look.

  • Inox - A premium stainless steel effect frame, perfect for contemporary composite doors with a sleek architectural feel.

Composite Door Side Panels

Side panels are ideal for wider entrances and can be matched to your chosen style and glazing.

Available in standard or flush styles with a wide choice of colours and finishes.

Size restrictions apply.

Low threshold upgrade

Upgrade to a Stormguard™ aluminium low threshold with optional wheelchair ramps.
  • Non-slip surface
  • Thermally broken design
  • Supplied with end caps
  • Designed to support Part M building regulations compliance when used with ramps.

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Useful Downloads

GRiPCore Brochure Doorco Brochure

Frequently Asked Questions

What is a composite door?

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A composite door is constructed from multiple materials to enhance strength, insulation and durability, and is commonly used as a front entrance door.

What are composite doors made of?

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Our standard GRP composite doors feature a reinforced insulated core and UPVC frame system with a durable GRP outer skin.

GRiPCORE composite doors use a hybrid core construction combining PIR foam, HDF plywood and aluminium layers for added rigidity and stability.

What is the difference between GRP and GRiPCORE composite doors?

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The main difference is the internal construction.

Standard GRP composite doors offers excellent all-round performance and value.

GRiPCORE composite doors features a hybrid layered core designed for enhanced rigidity and a more premium feel.

Are composite doors secure?

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Yes. Our modern composite doors are engineered for strength and security, with reinforced slabs, laminated glass supplied as standard, secure hardware and an ERA multi-point lock with twin high-security hooks. Upgrade options include the Ultion anti-snap cylinder with anti-pick, anti-bump and anti-drill protection, plus KeyControl to help prevent unauthorised key copying.

Are composite exterior doors energy efficient?

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Composite doors are designed to reduce heat loss thanks to their insulated core construction. Performance varies depending on slab type and overall specification.

How much are composite doors?

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Prices vary depending on:
  • Standard GRP or GRiPCORE slab
  • Style and collection
  • Glazing choice
  • Colour and finish
  • Side panels and hardware
Use our online designer tool and get an instant price.

Do you offer supply-only composite doors?

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Yes. We provide supply only composite doors as well as expert installation in selected areas.

Do composite doors require maintenance?

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Composite doors are low maintenance. Clean with warm soapy water, avoid abrasive cleaners and lubricate hinges and locking components periodically.

Design & order your composite front door

Bring timeless style and modern performance to your property, customise your door, get an instant quote, and place your order in minutes!