Get a quote and call our team on

020 4587 8300

Request Quote
GRP Composite Doors Review: Range Of Composite Doors & Buying Guide


GRP Composite Doors Review: Range Of Composite Doors & Buying Guide

Myles Robinson
Written by Myles Robinson
Updated on 21st May 2024
Posted on 21st May 2024

What are GRP Composite Doors?

GRP Red Composite Front Door

GRP or Glass Reinforced Plastic composite doors have become popular among UK homeowners seeking a balance of style, security, and energy efficiency.

They boast a compression-moulded GRP skin, foam-filled core, and solid frame. GRP doors are strong, durable, and resistant to various environmental factors.

These composite doors also offer homeowners a range of benefits, including realistic timber texturing, high thermal insulation, impact resistance, and low maintenance requirements.

Read here to learn about the doors from GRP Composite Doors, their unique features, glazing options, size variations, colour choices, and hardware selections homeowners can choose from.

installer fitting sliding patio door
Build your door today!
Design your door


Unique Features of GRP Composite Doors

Compression-moulded door skin

These composite doors are manufactured moulding Glass Reinforced Plastic (GRP) under high pressure. This technique results in a door skin that is strong, durable, and resistant to environmental factors.

With their GRP skins bonded, doors are fully sealed and toughened, making them difficult to break or damage. The compression moulding technique of the gel-coated GRP skins also allows for intricate detailing and a smooth finish, enhancing the overall aesthetic appeal of the door.

Polyurethane thermally-insulated core

The polyurethane thermally-insulated score contributes to the door's structural integrity and helps enhance thermal efficiency.

Every foam-filled GRP door offers enhanced insulation, helping maintain a comfortable indoor temperature and reduce energy costs.

Yet, despite their insulating capabilities, these solid-core doors are lightweight, adding to their overall mobility, efficiency and functionality.

This combination of strength, insulation, and efficiency makes these solid-core door amongst the best composite doors when seeking a balance of security and energy savings.


General Features of GRP Composite Doors

High-security multipoint locking system

GRP solid-core composite doors boast a high-security multipoint locking system that meets PAS24 accreditation standards.

Yale High Security Cylinders

The locking mechanism provides multiple points of secure locking around the perimeter of the door, enhancing security and preventing forced entry.

They also carry the Secured by Design accreditation, a police-preferred specification for security products.

Their anti-snap cylinder further reinforces the door's resistance to common burglary techniques, offering homeowners further protection and peace of mind.

Durability and low maintenance

The GRP material is inherently strong and resistant to warping, cracking, and fading, ensuring these solid core doors maintain their integrity and appearance.

This durability makes solid-core composite doors a long-lasting investment, offering years of reliable performance.

The low-maintenance nature of these doors also means they require minimal upkeep, saving homeowners time and money and making them a practical and cost-effective choice for many households.

Design your door


Glazing Options for GRP Composite Doors

High-performance glazing

The high-performance glazing used to manufacture GRP solid-core composite doors enhances your home's security and energy efficiency.

The doors' high-definition GRP skin and laminated security deter forced entry attempts, enhance thermal performance by reducing heat loss, and ensure you benefit from a secure and energy-efficient entrance solution that enhances safety and comfort within the home.

Custom glazing options

Homeowners can choose from various glazing options and styles, including leaded, bevelled, or frosted glass, to create a distinctive and personalised entrance.

This flexibility in glazing design allows homeowners to add a touch of elegance and sophistication to their property's exterior, making a lasting impression on visitors.


Size Options for GRP Composite Doors

Customisable sizes

Whether you require a standard-sized door or something custom, these robust doors can be tailored to fit specific requirements.

Glass Reinforced Plastic Composite Door

Choosing your entrance-specific door size allows for a seamless and tailored installation, ensuring that the door is aesthetically pleasing and functions optimally, providing the freedom to create an entrance that suits your property's unique layout and design.

Standard sizes

Also offered in standard sizes, GRP solid-core composite doors fit seamlessly with common-sized entrances.

Ensuring that homeowners can find a door that fits their existing frame, the standard-sized GRP doors provide a convenient and cost-effective solution when seeking a high-quality entrance door without bespoke sizing.


Colour Options for GRP Composite Doors

Extensive colour choices

From classic white and oak or wood effect finishes to bold black, blue, green, and red hues, homeowners can select a colour that complements their home's exterior aesthetic.

The wide range of colour options allows for personalisation and customisation, enabling homeowners to make a statement with their entrance door. Whether opting for a traditional look or a modern pop of colour, these composite doors offer versatility and style, helping enhance the curb appeal of any property.

Colour matching

These versatile solid-core composite doors can be colour-matched to existing door frames or surrounding architecture, ensuring a seamless and cohesive look.

This unique feature eases selecting a new door that seamlessly blends in with the surrounding architecture.

Design your door


Hardware Options for GRP Composite Doors

Versatile hardware selection

From handles and letter plates to knockers and hinges, there are various styles, finishes, and materials to choose from to customise GRP doors.

Catering to different personal tastes, decor, and architectural styles, the hardware options allow homeowners to create a cohesive and stylish entrance that reflects their preferences.

Whether seeking a contemporary look with sleek modern hardware or a traditional feel with classic accents, these must-have composite doors boast a range of choices to enhance the overall appearance and performance of the door.

Hardware finishes

Choose from polished chrome, satin nickel, and black to suit your design and taste preferences.

GRP solid-core composite doors are functional and allow homeowners to create a cohesive and stylish entrance reflecting their tastes and style.



Black Front Composite Door

Are GRP doors suitable for all types of properties?

These composite solid-core doors are versatile and customisable to suit various property styles and configurations.

Whether you have a modern home, a traditional property, or a period building, these composite doors offer a range of design options, sizes, colours, and hardware choices to complement different architectural aesthetics.

How do GRP composite doors compare to solid core doors?

Manufacturers use robust uPVC frames to craft GRP and other solid-core composite doors. GRP solid-core composite doors feature a 44 mm door slab, while solid-core doors boast either 44 mm or 48 mm door slabs.

Compared to ordinary uPVC doors, which feature a 28 mm polystyrene inner panel, GRP and solid core doors are stronger, more energy efficient, and more durable.

Design your door

Why should I choose a GRP door?

These doors offer the following benefits:

  • Thermal performance. These composite solid-core doors offer excellent thermal efficiency, with a U-value of 0.6W/m2K (equivalent to approximately four solid timber doors), helping keep homes warm and reducing energy costs.
  • Environmental considerations. The polyurethane foam core used in GRP composite doors is CFC and HCFC-free and boasts an ozone depletion potential (ODP) of zero and a global warming potential (GWP) of less than five. These exceptional ratings make GRP composite doors an environmentally friendly option that aligns with the growing demand for sustainable building materials.
  • Warranty and certification. May manufacturers and installers offer long-term warranties on their GRP composite doors, providing homeowners with added peace of mind and assurance of the product's quality and durability. Every GRP composite door carries certifications such as PAS24 and Secured by Design, ensuring they meet rigorous security standards.
  • Cost-effectiveness. While they may have a higher initial cost, the long lifespan and low maintenance requirements make GRP solid-core doors a cost-effective investment in the long run, helping homeowners save money on energy bills and avoid the need for frequent repairs or replacements.
  • Professional installation. GRP use trained and experienced professionals to ensure a proper fit, maximum security, and the optimal performance of your new GRP door.

How do I go about buying a GRP composite door?

Use these guidelines to help you select and buy a GRP door:

  1. Selecting your preferred door. Choose from a range of GRP composite doors in various colours and styles. Consider the size of your entrance, your particular energy efficiency, security and safety, and hardware needs.
  2. Measuring and ordering. Consult a trained and experienced door installer to help measure your door frame to ensure a perfect fit.
  3. Door installation and aftercare. Choose a certified installer to fit your new GRP composite door, ensuring optimal performance and longevity. Regularly clean and inspect your new door to check for cracks and water leakages to help prevent warping.

Do GRP composite doors warp?

No. Because of their uPVC-skinned solid cores, thick door slabs, and strong frames, GRP solid-core doors don't easily warp. Many exterior wood or uPVC doors warp and shrink when they lose t

heir moisture to the environment. Therefore, if you properly maintain your foam-filled GRP door and prevent moisture loss or water ingress, your new door won't easily bend out of shape.

Green GRP Composite Front Door with Side Panel

GRP Composite Doors for Your Home

When looking for a new front door for your home, a door from GRP Composite Doors might be just what you are looking for.

With their compelling combination of style, security, and energy efficiency, high-quality GRP doors will fit every homeowner's needs and style. These glass-reinforced plastic, solid-core composite doors have a range of unique features, customisable options, and low maintenance requirements. They provide a practical and attractive choice to enhance any property's aesthetic appeal and functionality.

Whether you're looking to upgrade your existing entrance with a high-quality door or create a stunning first impression for your new home, GRP Composite Doors are worth considering for their unbeatable blend of form and function.

Design your door

Written by
Myles Robinson
Myles Robinson Marketing Director
Posted on: 21st May 2024
Topic: Advice

Myles is dedicated to sourcing and fitting the best composite doors and windows. His mission is to offer our customers exceptional deals on energy-efficient composite doors, focusing on reducing costs while making sure the most advanced technology is readily available for installation. This commitment is what motivates Myles in the door industry.

More articles

Build Your Doors & Windows Online Design Online Here ➜