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Reliable and energy efficient GRP composite doors

Suredor 44mm GRP composite 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 timber doors, Masterdor

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

Suredor 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, Masterdor

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, Masterdor

Narrow frame available

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

Parts B, L, J and M compliant timber doors, Masterdor

Parts B, L, J and M compliant

Suredor doors are manufactured with building regulations compliance in mind, giving you total confidence.

Technical Information

44mm high impact fibreglass leaf, Masterdor

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, Masterdor

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, Masterdor

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, Masterdor

Multi-point locking system

All Suredor products are supplied with a multi-point locking system as standard.

Examples of Door Styles

Door Style 1

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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Door Style 2

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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Door Style 3

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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Door Style 4

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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Door Style 5

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 Suredor range, Masterdor


We offer seven classic woodgrain finishes for the Suredor 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 Suredor range, Masterdor


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.

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Specification Guide
Specification Guide

Download our comprehensive specification guide to browse the full range of Masterdor, Suredor 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.

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