GDO Pro 20mm Vertical Medium Rib (32 Colour Options) garage door Steel GDO

GDO Pro 20 Vertical Medium Rib Side Hinged Door

The GDO Pro 20 side hinged garage door combines a timeless design with the modern performance of an insulated double skinned steel construction. Delivered fully assembled within its own aluminium sub frame, this made to measure doorset offers improved security, thermal efficiency, and an easier installation process on site.

Classic Vertical Rib Design

This popular style features a classic vertical medium groove design that suits a wide range of traditional and contemporary property exteriors. The steel panels are finished in a high quality powder coating, with up to 32 standard colour options available to help match your home. For a clean internal appearance, the inside face of the panels is completely flat with no seam joints. You can configure your doorset in 50:50, one third, or two thirds split proportions, with your choice of active leaf opening.

Double Skinned Steel and Insulation

The door leaf is formed from two steel outer skins bonded to a central thermal core, creating a 20mm insulated panel. This double skinned design provides greater rigidity than single skin alternatives and helps reduce heat loss and draughts. It is a strong choice for integral garages or spaces used regularly, including workshops and hobby areas, where a more stable internal temperature is beneficial.

Enhanced Security Features

The robust steel construction improves resistance to everyday impacts and helps strengthen security when compared to basic non insulated doors. The inactive leaf is secured using concealed shoot bolts at the top and bottom, supported by a deadlock on the active leaf. For double leaf doors over 1600mm high, an optional three point locking system is available for increased security.

Effortless All In One Installation

Designed for straightforward fitting, the GDO Pro 20 is delivered as a complete ready to install unit. The insulated door leaves are factory fitted into a rigid box section aluminium sub frame, with the major fittings and hardware already in place. This approach reduces measuring and alignment work on site and helps speed up installation. A threshold is included as standard.

Key Features and Benefits

• Made to measure: Manufactured to suit your structural opening sizes as standard.
• Complete doorset: Door leaves supplied factory fitted within an aluminium sub frame for easier installation.
• 20mm insulated steel panel: Double skinned steel bonded to a thermal core for improved rigidity and thermal performance.
• Colour options: White supplied as standard, with up to 32 standard powder coated colour finishes available; special RAL colours available on request.
• Flexible door splits: Available in 50:50, one third, or two thirds split configurations.
• Opening choice: Select left or right hand active leaf opening; outward opening is standard, inward opening may be available on request.
• Adjustable colour matched hinges: Heavy duty external hinges with three way adjustment for accurate alignment; hinge quantity increases on larger sizes.
• Secure locking: Concealed shoot bolts on the inactive leaf plus a deadlock and adjustable keep on the active leaf; optional three point locking for taller double doors.
• Handle options: Standard lever handle supplied, with optional stainless steel long handles available.
• UK made: Manufactured in the UK.

When you are ready to order, simply choose the 'up to' size that covers your opening, and then enter your exact structural measurements into the ordering fields. From there, you can configure your door using the options provided. If you have any special requirements, such as needing the doors to open inwards, or if you just want to check the latest pricing and specifications, please feel free to email or call our team.

Factory Fitted Sub Frame
To ensure the easiest possible installation, your GDO Pro 20 doorset is delivered fully assembled with the aluminium fixing sub frame factory fitted as standard. This all in one construction guarantees accurate panel alignment straight out of the factory.

3 Point Locking
For an added level of security, a three point locking system featuring twin hood locks is available as an optional upgrade.
Please note: Minimum height over frame required is 1600mm.

Hinges
All heavy duty hinges come colour matched to your chosen door finish and are fully adjustable in three directions, allowing for fine tuning and perfect alignment of the door leaves on site.

Seals
Double seals fitted to both the door leaf and the frame help to protect your garage interior against the weather, while effectively limiting dust and debris from entering the space.

Handle Options
Customise the look of your doorset by selecting from our premium handle finishes. Options are available in Bronze effect (dark brown appearance), Gold effect, or Satin effect to perfectly complement your chosen door colour.

Matching Pedestrian Side Doors
If your garage features a separate side entrance, we offer matching pedestrian doors built to the exact same high quality, double skinned insulated specification as your main garage doors. Available in widths up to 1320mm and heights up to 2340mm, these side doors feature the same vertical rib design, handle options, and robust deadlock arrangement, ensuring a perfectly consistent aesthetic across your property.

Door Stays
Friction door stays are now fitted as standard at no extra charge, preventing the doors from blowing shut in the wind.

Colour Options
Personalise your garage door with a choice of 32 colour options. The paint finish features a highly durable powder coat ripple texture, providing an attractive appearance alongside excellent resilience against the British weather.

Choose from the classic low gloss solid colours below:

STANDARD FOC COLOURS:
White RAL9016
Black RAL9005
Grey RAL7016

PREMIUM COLOURS:
Signal Grey RAL7004
Dusty Grey RAL7037
Traffic Grey RAL7042
Light Grey RAL7035
Window Grey RAL7040
Basalt Grey RAL7012
Pebble Grey RAL7032
Iron Grey RAL7011
Slate Grey RAL7015
Graphite Grey RAL7024
Agate Grey RAL7038
Black Grey RAL7021
Steel Blue RAL5011
Cobalt Blue RAL5013
Sky Blue RAL5015
Gentian Blue RAL5010
Signal Blue RAL5005
Light Blue RAL5012
Moss Green RAL6005
Fir Green RAL6009
Chartwell Green BS14 C 35
Ruby Red RAL3003
Traffic Red RAL3020
Chocolate Brown RAL8017
Clay Brown RAL8003
Mahogany Brown RAL8016
Light Ivory RAL1015
Cream RAL9001
Traffic Yellow RAL1023

GDO Pro 20 insulated side hinged doorset specification

The GDO Pro 20 is a made to measure, double skinned insulated steel side hinged garage doorset designed for everyday use where improved strength, security and thermal performance are important. Supplied pre-assembled in its aluminium sub frame, it arrives as a complete doorset ready for straightforward installation on site.

Door construction and insulation

The door leaves are manufactured using 20mm double skinned insulated steel panels, helping to improve rigidity and reduce draughts and heat loss compared with basic single skin steel doors. The inner face is neat and flat for a clean internal appearance, making this an ideal choice for integral garages, workshops and garages used regularly.

Sizes and made to measure manufacturing

Each doorset is made to measure to suit your opening sizes, up to 2750mm wide and 2340mm high. Doors can be configured as a 50:50 split or as an asymmetric 1/3 and 2/3 split, depending on your preferred access arrangement.

Aluminium sub frame supplied and factory fitted

The GDO Pro 20 doorset is supplied pre-hung and factory fitted within its aluminium sub frame as standard, helping ensure accurate alignment and a faster, simpler installation. The frame and threshold arrangement also supports effective sealing around the perimeter for improved weather protection.

Security and locking

The doorset is designed to provide improved security for everyday garage use, with a robust lock and secure inactive leaf retention. For an added level of security, a 3 point locking upgrade is available on suitable door sizes (minimum height over frame 1600mm).

Hinges and alignment adjustment

Colour matched hinges are supplied and are adjustable in three directions to help fine tune alignment of the door leaves on installation.

Weather sealing

Double seals to the door leaf and frame help protect against the weather and limit dust and debris entering your garage.

Handle and finish options

A range of handle finish options is available to complement your chosen door colour and overall exterior style.

Colours

Choose from 32 colour options in a durable stipple effect powder coated finish, designed for long term appearance and low maintenance.

Matching pedestrian side door

If you also need a separate access door, a matching GDO Pro 20 Vertical Medium Rib personnel door is available with the same insulated construction and styling, so you can keep a consistent look across the property: View the matching Pro 20 personnel door.

Installation Guidance for GDO Pro 20 Doorsets

One of the biggest advantages of the GDO Pro 20 insulated side hinged garage door is that it is delivered fully pre-assembled. The insulated door leaves come factory hung within their heavy duty aluminium sub frame, eliminating the need for complex assembly on site. This "all in one" approach significantly reduces installation time and ensures factory accurate tolerances from the start.

While full, detailed manufacturer fitting instructions are provided with the door, the standard installation process follows these key steps:

1. Preparation and Checking

Before removing your old garage door, carefully measure your new GDO Pro 20 doorset and check it against your structural opening to ensure it will fit. Make sure the floor where the threshold will sit is solid and completely level; an uneven floor can cause the doors to catch or prevent the weather seals from working effectively.

2. Positioning the Doorset

Because the doors and frame are pre-assembled, they should be offered into the structural opening as one complete unit. Keep the door leaves closed and locked during this stage to keep the frame rigid. Use plastic packers or timber wedges between the aluminium frame and the brickwork to hold the doorset securely in place. Use a high quality spirit level to ensure the frame is perfectly plumb, square, and level.

3. Fixing the Frame

Once you are completely satisfied that the frame is perfectly upright and square, drill through the aluminium fixing sub frame and into the structural opening. Secure the frame using appropriate masonry frame fixings (not supplied). It is important not to over tighten the fixings, as this can bow the aluminium frame and pinch the door leaves.

4. Securing the Threshold

The doorset features a built in threshold that must be firmly fixed to the floor. Ensure a line of sealant is applied beneath the threshold before final fixing to prevent water from tracking underneath into the garage.

5. Testing and Final Adjustments

Once the frame is fully secured, unlock and open the door leaves to check their operation. They should swing smoothly without catching. If slight adjustments are needed due to the opening being slightly out of square, the GDO Pro 20 features heavy duty 3-way adjustable hinges. These allow you to finely tune the position of the door leaves in three directions for a perfect, even gap and smooth lock engagement.

6. Perimeter Sealing

Finally, once the door is operating perfectly, apply a high quality exterior silicone sealant around the entire perimeter gap between the aluminium frame and the brickwork to ensure the installation is completely weather tight.

Please note: We always recommend downloading and reading the full official installation manual prior to beginning work.

Installation instructions can be found here

GDO Pro 20 Warranty & Guarantee

The GDO Pro 20 side hinged garage door is manufactured in the UK to exacting engineering standards. To provide you with complete peace of mind, your doorset is backed by a comprehensive manufacturer's warranty. To ensure the validity of these guarantees, the door must be installed, operated, and maintained in accordance with the supplied manufacturer instructions.

10-Year Safe and Reliable Operation

The main structure of the GDO Pro 20 door is covered by a 10-year warranty ensuring safe and reliable operation. This provides long-term confidence in the core structural integrity and safety of your garage doorset.

2-Year Hardware and Component Guarantee

A 2-year warranty is provided on all moving and mechanical parts under normal daily use (defined by the manufacturer as up to 5 open/close operations per day). This comprehensive cover includes all primary hardware such as hinges, locking mechanisms, shoot bolts, and handles.

2-Year Factory Paint Finish

The factory-applied powder coat colour finishes are covered by a 2-year warranty against primary paint failure. Please note: As is standard with steel door manufacturing, the rolling and pressing process may cause slight natural distortion which can become apparent under certain lighting, and minor cosmetic blemishes are considered normal. The internal rear face of the door is not designed to have the exact same uniform cosmetic finish as the exterior.

Coastal and Estuary Exclusions

Please be aware that any steel doors fitted within 250 metres of the coastline (where the beach ends and the land begins) or directly adjacent to an inland estuary are strictly exempt from the paint finish warranty due to the highly corrosive saline environment.

Key Warranty Conditions and Exclusions

• Inspection upon Delivery: Goods must be carefully inspected upon arrival. Any transport damage or missing items must be reported within 48 hours of receipt. By proceeding to install the garage door, you acknowledge and accept its visual condition; no claims for cosmetic damage can be accepted once the item has been installed.
• General Maintenance: The door panel must be kept clean and free from impact damage. Any accidental areas of paint damage must be dressed with touch-up paint as soon as possible to prevent corrosion. Regular cleaning and light lubrication of the moving parts is required.
• Warranty Invalidation: Improper installation, structural modifications, repairs by non-qualified individuals, or damage caused by severe external influences (such as fire, flooding, alkaline solutions, bird droppings, or abnormal atmospheric pollution) will completely invalidate the warranty.

* Terms and conditions apply, full details can be found here

Minimum & Maximum Ordering Sizes