Composite Door FAQs

A GRP composite door is constructed using multiple materials, combining a high-performance core with a Glass Reinforced Plastic (GRP) outer skin. This creates a strong, weather-resistant door that offers excellent thermal efficiency and long-term durability.

GRP doors are widely used in the trade because they:

• Require minimal maintenance
• Do not warp, crack, or fade like timber
• Provide consistent quality across installations

A GRP door is a type of composite door that uses a Glass Reinforced Plastic outer skin.

Most modern composite doors use a GRP outer skin because it offers excellent durability, weather resistance, and a realistic timber-like finish without the maintenance. This GRP layer protects the door from warping, cracking, fading, and moisture damage, making it ideal for UK weather conditions.

For trade installers, GRP composite doors are a popular choice because they provide consistent quality, low maintenance, and reliable long-term performance, making them easier to install and maintain across multiple projects.

Yes. They are consistent in size, easy to handle, and require minimal adjustment on-site, making them ideal for trade installations.

Yes. We work directly with installers, contractors, and developers to supply composite doors for a wide range of projects.

Yes. Composite doors are designed with insulated cores that improve thermal performance and reduce heat loss.
Replacement doors in existing homes to achieve U‑values of 1.4 W/m²K or better. Our composite doors are built to meet or exceed these requirements, giving you confidence on site and reassurance for your customers.

With proper installation, GRP composite doors are designed to last for many years with minimal maintenance. The expected lifespan of a Door-Stop composite door is 35 years.

You can find full details of our colour range, including the relevant RAL references, on the dedicated colours page. This provides a clear overview of all available finishes, helping you match specifications accurately for your project.

Referring to this page ensures you’re working with the correct, manufacturer-approved colour options and avoids any discrepancies when quoting or placing orders.

Your Area Sales Representative is available to support your business, but many day-to-day tasks from quoting and ordering to tracking and technical information, can be handled quickly through your account.

Using Door Vault gives you immediate access to everything you need, whenever you need it, while still having the reassurance that your representative is there to support you when required.

Many common technical questions are covered within our online resources found in your account, where you’ll find detailed product information, specifications and guidance as you configure your door.

If you need further clarification, you can submit your query to our customer service team or your area sales manager, along with any supporting details such as drawings or photos. This allows us to provide a clear and accurate response, tailored to your specific job.

Yes. Our supply model supports both single orders and ongoing project requirements, making it easy to reorder consistent products.

To discuss your project, please get in touch with our sales team, who will be able to answer any questions you have.

You can apply for credit terms by contacting your area business manager. The application process is quick to complete, and once approved, your account will be updated to reflect your agreed terms.

Until then, you can continue placing orders through the system on a pro forma basis, ensuring there’s no delay in getting started.

Yes  –  the easiest way to get an accurate price is by using our online door configurator*. You can build the exact door you need, including sizes, colours, glazing and hardware, and receive an instant quote based on your specification.

This not only speeds things up but also ensures the price you see reflects exactly what will be manufactured, helping you quote your own customers with confidence.

* You will need to make sure you have registered for an account and are logged in

The quickest and most accurate way to place an order is through our online door configurator*.  It allows you to configure the door to your exact specification, check everything in real time, and submit instantly, reducing the risk of errors and delays.

Once submitted, your order goes will go into production, helping you keep projects moving.

* You will need to make sure you have registered for an account and are logged in

You can make changes to your order directly through your online account using the Change Order section in your account, ensuring any updates are submitted quickly and accurately against the correct order.

Our cut-off time for amendments is 10am. If you place an order after 10am, you have until 10am the following working day to make any changes. If your order is placed before 10am, any amendments must be completed by 10am on the same working day.

Making changes within this timeframe helps avoid delays, as orders move into production shortly after the cut-off.

You can check the status of your order at any time through your account. The system provides clear, real-time updates as your order progresses through production* and dispatch, giving you full visibility without needing to chase for updates.

This is the fastest way to stay informed and plan your installations with confidence.

If there’s an issue with your delivery, you can report it directly to our customer services team, using the form above. This ensures your claim is logged immediately and linked to the correct order, allowing our team to resolve it as quickly as possible.

We recommend checking all goods on arrival and recording any damage or discrepancies at the point of delivery. Uploading photos alongside your report will help speed up resolution and minimise disruption to your install schedule.

Yes. With a variety of styles and finishes available, composite doors can be specified for both traditional, cottage and modern properties.

Composite doors are designed for consistent sizing and reliable fit, helping simplify installation and reduce time on site.

If you need installation guides, these can be found in your account area.

Composite doors are built for long-term performance and durability, requiring minimal maintenance once installed.

With proper installation, GRP composite doors are designed to last for many years. The expected lifespan of a Door-Stop composite door is 35 years.

You can see our full certificates and data sheets on our Technical Data page.

You can also download copies of our Installation Guide and Resident Guide from our Literature page

Inspections of all fire doorsets should be undertaken by a competent person on a regular basis. Inspection should also include the door closer, checking that the door leaf closes and latches from every angle, the variable speed of the door closer is adjusted to ensure safe operation and the door closer has been adjusted to ensure that the appropriate opening and closing forces have been achieved.​

In high traffic areas, such as common areas, corridors and stairwells it is recommended that doorsets may require more frequent inspection, in order to identify any wear and tear or product damage. Inspection and maintenance works should be documented in order to record the product history.

It is the building designer’s responsibility and not that of Door-Stop to ensure that the correct doorset specification is used for the particular development, construction or building type.​

The Door-Stop website configurator, used to order your fire doorset, is specifically designed to only allow configurations, and therefore orders, for fire doorsets that are compatible within the limitations of the Door-Stop certification.

Traceability labels on the edge of the door leaf provide a critical traceability link from the specific doorset back to the manufacturer and relevant certification, throughout the life service of a product.​

The label references the specific certificate and data sheet for the doorset and the unique traceability number of the label provides traceability of the manufacturing processes, raw materials and components that relate to the specific doorset.

View our certificate and data sheet online.​

Labels must not be damaged or removed. The removal of the label/s will result in a failure to meet the certification and therefore invalidate warranties. Labels cannot be replaced without an on-site inspection of the product by a Door-Stop representative and will incur an additional charge.

Target 10 Working days – can be subject to change.​

Fire doorsets are safety-critical products and we ensure every individual fire doorset has the correct checks carried out on it throughout production.

No – glazed apertures in fire doorsets (within the door leaf or toplight) can only be installed by a trained Door-Stop representative using compatible components.​

This will assure the specification is maintained and all parts, including intumescent protection and fixings are in accordance with certification.​

Please contact Customer Services below.

It is recommended that trained competent installers are used for the installation of fire doorsets. One way of demonstrating competence is to engage third party certificated installers.

All fire doorsets are supplied with a copy of the installation guide.

Door-Stop do not recommend any components of this fire doorset are changed. If throughout the life of the doorset a component replacement is required, it is critical that the components exactly match those listed on the relevant fire certificates and data sheet for this specific doorset.

Changing specification of any components will invalidate product certification, warranties and present safety and performance risk in a fire. Any maintenance works should be carried out by a competent person and documented and kept as part of the building record and fire door register.

Please refer to the installation guide.

Glazing of toplights is a complex task and Door-Stop supply their toplights factory glazed with a tested and certificated fitting system to allow the toplight to be fitted without needing to be deglazed on site.

There are several solutions for lineal gap sealing systems that are compatible and compliant with the certification of Door-Stop fire doorsets.

Please refer to the Certificate and installation guide.