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Reliable and energy efficient GRP composite doors

The 44mm GRP composite doors by Calibre Doors have a high density, CFC- and HCFC-free foam core, and are available in 7 colours and 28 styles to suit all applications.

Features and Benefits

Quality assured GRP composite doors, Calibre Doors

Compliant with PAS24:2016, Approved Document Q and Secured by Design

Our GRP products are compliant with the latest PAS24 standards and are suitable for new build projects adhering to Document Q guidelines.

Patented hinge set for composite doors, Calibre Doors

Unique patented hinge set

To solve the issue of doors dropping from adjustable hinges, our purpose-designed and patented hinge set offers long-lasting performance and reduced maintenance.

Wheelchair-friendly doors, Calibre Doors

Narrow frame available

When wheelchair access is required, our entire composite range can be manufactured with a narrow frame.

Parts B, L, J and M compliant composite doors, Calibre Doors

Parts B, L, J and M compliant

Our range of composite doors are manufactured with building regulations compliance in mind, giving you total confidence.

Technical Information

44mm high impact fibreglass leaf, Calibre Doors

44mm high impact resistance fibreglass door leaf

Designed to be strong and stable while requiring very little maintenance, our fibreglass door leaf is perfect for social housing projects and new build applications.

Triple weather seal, Calibre Doors

Triple weather seal

Every door comes with a triple weather seal – achieving 1200pa wind performance – for excellent thermal and wind performance as standard.

2mm GRP skin, Calibre Doors

2mm GRP skin with high resistance

Our doors are finished with a 2mm hardwearing, wood-effect GRP skin with high resistance to daily wear and scratching.

Multi-point locking system, Calibre Doors

Multi-point locking system

All Calibre Doors composite door products are supplied with a multi-point locking system as standard.

Examples of Door Styles


This modern design boasts four glazed panels that may be situated in three alignments, creating an elegant and contemporary statement door. Different hardware options are also available for a unique specification.

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This contemporary design is the perfect option to bring a modern aesthetic to a traditional home. The customisable split glazed design allows you to choose various glazing positions as well as decorative options.

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This traditional door style features a dual glazed option to provide a timeless statement. A range of hardware and glazing options may be specified to elevate the door and will suit any architectural style.

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A traditional door style with elegant lines and four glazing panels that maximise potential natural light to the living space beyond. A wide range of glass options are available to accommodate any style or aesthetic.

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One of our most popular styles, this half glazed door can transform any dark corridor by flooding the area with natural light, while accommodating the need for privacy with a range of glazing options.

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Colours for the composite range, Calibre Doors


We offer a variety of woodgrain finishes for the GRP composite range – all doors are supplied white internally as standard. Frames are supplied in a choice of White, Golden Oak or Rosewood.

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Hardware for the composite range, Calibre Doors


We offer customers a wide choice of hardware options selected from a range of renowned suppliers including Winkhaus, Hoppe and SEA.

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We offer a range of contract services including installation and sign-off, tenant appointments and dedicated contract management. Speak to our team to see how we can support you.

Find out more
Specification Guide
Specification Guide

Download our comprehensive specification guide to browse the full range of timber, GRP composite and flood doors, including complete hardware, glazing and colour options.

10-year guarantee

All of our products come complete with a 10-year guarantee covering the door blade, glazing and frame. Thresholds are covered by a five-year guarantee and our hardware products vary, depending on the manufacturer’s warranty.

Speak to our team
Speak to Our Sales Team

Need some help? If you have a question, would like to place an order or are keen to meet with a member of our sales team, get in touch by calling 01773 852311. We’ll put you through to a member of our sales team to discuss your queries.

Contact us


Whether you have a project in mind or would like further information about our product range, the Calibre Doors sales team are here to help.