GDO Classic Medium Horizontal Rib Special Offer Up and Over garage door Steel GDO

GDO Classic Medium Horizontal Rib Steel Up and Over Garage Door

The GDO Classic Medium Horizontal Rib is a durable, low maintenance galvanised steel up and over door that offers a clean, contemporary appearance. Rather than the narrow traditional ribs found on older doors, the medium width horizontal profile gives a broader, bolder visual line. This design works exceptionally well on modern detached homes, 1970s and 1980s property updates, and any garage where you want to complement horizontal cladding or modern composite front doors.

Manufactured in the UK, every door is pressed from premium grade galvanised sheet steel with welded rear bracing to provide a rigid, secure panel that resists flexing. Unlike doors that arrive as separate parts, this model comes pre-hung within its own factory fitted steel sub frame, saving substantial installation time and guaranteeing square alignment straight off the lorry.

Pre Fitted 50mm Steel Sub Frame Included

This door is supplied as a complete pre-framed unit as standard. The 50mm steel box section sub frame is fitted directly to the door leaf and operating gear at the factory:

• Quick and Straightforward Fitting: Because the lifting springs, pivot arms, and tracks are pre-mounted to the steel frame, you do not need to assemble complex mechanisms on site. You simply unpack the unit, position it into the opening, square it up, and fix through the frame legs into the masonry.
• Zero Timber Maintenance: Eliminates old fashioned timber goalposts that rot, warp, twist, and require regular painting.
• Colour Matched Finish: The steel sub frame is factory powder-coated in the exact same colour as the door panel, giving a sharp, seamless picture frame border around the door. You can choose white as well for the sub frame only.

Crucial Measuring and Sizing Information

GDO up and over doors are ordered by their Overall Width and Overall Height, which includes the 50mm factory steel sub frame. This makes ordering straightforward, but it requires careful attention to your installation position:

• 8 Standard UK Widths Available: Supplied in 6ft 6in (2081mm overall), 6ft 10in (2183mm overall), 7ft 0in (2234mm overall), 7ft 1in (2259mm overall), 7ft 3in (2310mm overall), 7ft 5in (2361mm overall), 7ft 6in (2386mm overall), and 8ft 0in (2538mm overall). Standard heights are 6ft 6in (2031mm overall for canopy) and 7ft 0in (2184mm overall for retractable).
• Installing Behind the Aperture (Internal Face Fit): Fitting to the inside face of the brick piers preserves the maximum clear drive-through opening. Make sure you have at least 50mm of flat pier face on each side and 50mm headroom at the lintel. Important check: Ensure the internal daylight opening of the door frame (the space the door panel swings through) is smaller than the brick opening so the door panel can swing through without catching the masonry jambs or lintel.
• Installing Between the Aperture (Between Fit): The overall frame sits directly between the brick jambs. Your brickwork structural opening must be slightly larger than the overall frame width and height to allow for fitting tolerance (we recommend allowing roughly 10mm across the width and 5mm over the height).

Operating Mechanism: Canopy vs Retractable

Both gearing options are factory-mounted directly to the 50mm steel frame to suit how you plan to use the garage:

• Canopy Operating Gear: Operated by an overhead torsion spring mounted across the head frame, paired with cables and precision steel rollers running in vertical side tracks. When open, approximately one third of the door panel protrudes outward to form a neat external canopy. Because there are no tracks running back into the garage, canopy gear leaves your entire ceiling space completely clear for overhead storage, roof boxes, or ladders. Engineered primarily for effortless manual hand operation.
• Retractable Operating Gear: Uses heavy duty side mounted tension springs and horizontal ceiling level tracks that project back into the garage. The entire door leaf glides inside when open, leaving no panel protruding outside. Retractable gear is the correct choice if you plan to automate the door with a remote control electric operator, and it provides light, smooth manual operation.

32 Durable Factory Powder-Coated Colours

While most standard steel doors only give you a handful of basic colours, the GDO Classic is available in an extensive palette of 32 factory-applied, low-gloss powder-coat finishes. Both the door leaf and the 50mm steel sub frame are coated in the same durable, weather-resistant finish:

Popular Architectural Colours:
Traffic White (RAL 9016)
Jet Black (RAL 9005)
Anthracite Grey (RAL 7016)

Contemporary Greys:
Light Grey (RAL 7035)
Window Grey (RAL 7040)
Traffic Grey (RAL 7042)
Slate Grey (RAL 7015)
Graphite Grey (RAL 7024)
Iron Grey (RAL 7011)
Basalt Grey (RAL 7012)
Pebble Grey (RAL 7032)
Dusty Grey (RAL 7037)
Signal Grey (RAL 7004)
Agate Grey (RAL 7038)
Black Grey (RAL 7021)

Greens and Blues:
Chartwell Green (BS 14 C 35)
Moss Green (RAL 6005)
Fir Green (RAL 6009)
Steel Blue (RAL 5011)
Signal Blue (RAL 5005)
Gentian Blue (RAL 5010)
Cobalt Blue (RAL 5013)
Light Blue (RAL 5012)
Sky Blue (RAL 5015)

Reds, Creams and Earthy Tones:
Ruby Red (RAL 3003)
Traffic Red (RAL 3020)
Traffic Yellow (RAL 1023)
Light Ivory (RAL 1015)
Cream (RAL 9001)
Clay Brown (RAL 8003)
Chocolate Brown (RAL 8017)
Mahogany Brown (RAL 8016)

Fittings, Mechanical Locking & Security

• Secure Multi Point Locking: Fitted with an ergonomic round black exterior handle and interior turn disc operating solid two point slam-action mechanical latches that engage into the side frame legs.
  4 point locking is available as an extra option to have a lock in all 4 corners of the door
• Euro Profile Cylinder: Supplied with a standard euro profile cylinder and 2 keys. Can be keyed alike to other matching personnel doors on request.
• Electric Automation Ready: Retractable models link directly to any good quality ceiling mounted boom operator (such as the GDO 800XL or Hormann ProMatic/SupraMatic). An optional de-latch kit can be added to retain mechanical lower frame locking alongside the motor boom lock.

These GDO special offer up and over doors are standard sizes only, and you choose canopy or retractable gear when you start the order. Standard up and over doors in the UK are ordered using imperial size references, which relate to the nearest overall frame dimensions, rather than exact metric conversions.

Canopy or Retractable Gear

The first decision is whether you want canopy or retractable operating gear. Canopy gear uses a preassembled torsion spring above the door panel with cables either side to lift the door, and when it is fully open about a third of the panel projects out of the front of the garage, which is where the “canopy” name comes from.

Retractable operating gear uses lifting arms either side with springs and horizontal tracks inside the garage, so the door swings out a little further on the way up but then retracts fully back into the garage on the tracks. This makes retractable gear the better option if you know you want to add an electric operator, assuming you have enough headroom and length inside the garage for the boom.

Canopy mechanism with steel frame

Retractable mechanism with steel frame

Handle Options

You can choose a standard black handle with euro profile cylinder locking, or no handle and no handle hole drilled at all. No handle is usually chosen when the door is going to be used with an electric operator so you are not left with an unused external handle and keyhole.

Door type and operation

• Type: Single skin steel up and over garage door with canopy or retractable lifting gear.
• Operation: Manual as standard, with retractable gear the better choice if you plan to add an electric operator.
• Sizes: Standard sizes only, no made to measure on this range.

Construction and finish

• Construction: Galvanised steel door leaf with pressed ribs, folded edges and internal bracing for strength.
• Finish: Factory finished in a choice of 31 colour options on the door and optional steel frame.

Steel sub frame

• Supplied pre-framed as standard.

Operating gear options

• Canopy – Overhead torsion spring and cables, with about one third of the door projecting out when open.
• Retractable – Side arms and horizontal tracks, the door retracts fully into the garage and is well suited to electric operators.

Locking

• 2 point internal locking as standard.
• 4 point internal locking upgrade, using cables from the internal handle to operate extra locking points (no exposed locking rods).

Handle options

• Standard black external handle with euro cylinder for manual use.
• Or supplied without handle and without handle hole for electric operation.

Installation

• A level floor and square, plumb opening are important for the best results and smooth door operation.

Door Sizes

GDO Steel Up and Over Size Conversion Chart (Canopy or Retractable)

All GDO steel doors are supplied complete with a factory fitted 50mm steel box-section sub frame. The ordering size is the overall frame size (external frame width x height in mm). Both canopy and retractable operating mechanisms share the exact same overall dimensions.

*Fitting tolerance note: The dimensions listed above are the exact outer frame sizes including the 50mm frame. If fitting between the brickwork opening, allow approximately 10mm on the overall width and 5mm on the overall height for on-site clearance and out-of-square masonry.

Delivery guidance

Installation guidance

• These doors should be fixed to a sound, square and level opening, whether you are using the factory-fitted steel frame or your own timber frame.
• Always check the floor is level where the frame legs sit; any fall in the floor will affect how well the door closes and seals.
• Allow a small amount of fitting tolerance around the overall frame size to pack, plumb and level the frame properly before final fixing.
• The door and frame will arrive pre-assembled. Offer the frame into the opening, wedge and support it, then check with a spirit level on the head and both legs before drilling and fixing.
• Fixings should be suitable for the wall type (for example, concrete screws, frame fixings or sleeve anchors into brick or block). Use several fixings down each leg of the frame rather than relying on just a couple near the top.
• With a timber sub frame, make sure the timber is straight, treated and securely fixed to the structure before you hang the door to it. The door gear then fixes back to the timber uprights and head.

Space and clearance

• Check you have enough headroom inside the garage for the chosen gear: canopy needs space above the opening for the spring shaft, and retractable needs extra headroom and depth for the horizontal tracks and any electric operator boom.
• Make sure there is enough clear space in front of the garage for the door to swing out fully during operation, especially with retractable gear which swings out a little further on the way up.

General advice

• Two people are strongly recommended for handling and positioning the door and frame safely.
• After fixing, check the door runs freely, latches securely and sits evenly against the frame; adjust as needed before fully tightening all fixings.
• Basic maintenance such as light oil on pivots, rollers and moving parts will help the door run smoothly and extend the life of the operating gear.

Warranty information

These steel up and over doors are covered by a manufacturer’s warranty, provided they are installed and used in normal domestic conditions.

1. Warranty period

• Garage door, frame and mechanism: 10 year warranty covering the safe and reliable operation of the garage door from the date of purchase, for the original purchaser.
• Springs, tracks, rollers and hinges: 2 year warranty for normal domestic use (no more than 5 open/close operations per day). We recommend they are inspected annually by a competent engineer.
• Replacement parts: 6 month warranty on replacement parts, or the remainder of the original warranty period if longer.
• Paint finish: Factory-applied finish covered against rust-through and loss of adhesion for the stated warranty period, assuming the surface is kept clean and is not damaged by impact or harsh chemicals.

2. Requirements

• Warranty is only valid in the country where the garage door was purchased.
• The product must have been purchased through an authorised partner and supported by a valid receipt and product identification (such as barcode/serial label).
• The warranty covers the garage door, frame and operating mechanism only, and does not extend to any surrounding building work or consequential damage.

3. Performance

• During the warranty period, defects which can be shown to be due to material or manufacturing faults will be rectified. At the manufacturer’s discretion this may be by repair, exchange of parts, supply of a replacement door, or a reasonable reduction in price.
• The warranty does not cover any costs for removal, refitting, installation labour or delivery/attendance charges.

4. Exclusions

• Improper transport, storage or fitting.
• Repairs or adjustments carried out by non-qualified or non-competent individuals.
• External influences such as fire, water ingress, alkaline solutions, acids, salt, bird droppings or abnormal atmospheric or industrial pollution.
• Use of non-approved parts or accessories without the manufacturer’s agreement.
• General wear and tear, lack of reasonable maintenance and any damage caused by impact or misuse.

Full warranty terms, including any updates or model-specific details, are supplied with the product documentation and are available on request.

Click here to view this door's product guarantee.

GDO Steel Up and Over Size Conversion Chart (Canopy or Retractable)

All GDO steel doors are supplied complete with a factory-fitted 50mm steel box-section sub frame. The ordering size is the overall frame size (external frame width x height in mm). Both canopy and retractable operating mechanisms share the exact same overall dimensions.

*Fitting tolerance note: The dimensions listed above are the exact outer frame sizes including the 50mm frame. If fitting between the brickwork opening, allow approximately 10mm on the overall width and 5mm on the overall height for on-site clearance and out-of-square masonry.