GDO Classic Harrowden (32 Colour Options) Side hinged garage door Steel GDO

GDO Classic Harrowden Side Hinged Garage Door, Standard Sizes

The Harrowden features pressed Georgian style raised cassettes arranged in four balanced columns of three across the face of the door. With two columns on each leaf, the closed door creates a symmetrical twelve panel pattern that replicates the appearance of a traditional joinery made timber garage door.

It is ideally suited to period properties, Georgian townhouses and traditional new build homes where a ribbed steel door would feel out of keeping. You get authentic panelled character in low maintenance galvanised steel that never needs painting. This version is supplied across 15 standard sizes, matching common single garage apertures in the UK.

Why the Harrowden is 50/50 split only

The raised panel layout is designed symmetrically around two equal leaves, with the centre meeting stile falling cleanly between the second and third panel columns. An asymmetric 1/3 and 2/3 split is not available on this design because the split would cut directly through a column of pressed cassettes.

What is included

• Pre framed and fully assembled in a factory finished 50mm steel frame
• Black exterior locking handle, 3 cylinder keys and an internal release handle
• Two point latches operated by internal steel cables on the active leaf
• Top and bottom shoot bolts fitted to the rear of the passive leaf
• Fitting pack with 6 angled steel brackets, coach screws and washers

Construction details

Manufactured from single skin galvanised steel with pressed raised cassettes, finished in durable low gloss powder coat. Heavy duty steel bracing across the rear face gives the leaves structural rigidity. Fixed steel hinges with protective corrosion plating carry the leaves inside a 50mm box section steel frame.

Colour finishes

Available in 32 powder coated colours. White (RAL 9016), Jet Black (RAL 9005) and Anthracite Grey (RAL 7016) carry no surcharge. Classic heritage shades such as Chartwell Green, Fir Green, Ruby Red and Cream look particularly striking on the Harrowden's pressed panel detailing.

Ordering and fitting

Check your structural opening against the 15 standard sizes in the Measure tab. Dimensions are overall outside measurements including the 50mm frame. Because the 50/50 split produces two wide leaves, confirm there is plenty of outward swinging clearance on the driveway, and consider adding friction door stays to hold the leaves securely in windy weather.

* Outward swinging as standard.

Customising Your GDO Classic Harrowden Door

Every Harrowden side hinged doorset arrives pre framed and fully assembled with Georgian cassettes pressed into each leaf. Here are the choices to confirm when ordering.

Ordering size

Select from 15 standard sizes across five widths (2081mm, 2183mm, 2234mm, 2386mm and 2538mm) and three heights (1980mm, 2031mm and 2184mm). These are the overall dimensions of the door and steel frame combined. Check the Measure tab to verify the clear internal opening dimensions.

Door leaf arrangement

The Harrowden design is built as a symmetrical 50/50 split only. The Georgian cassettes are pressed in four neat columns, two on each leaf, so the doors meet evenly in the centre. An asymmetric 1/3 and 2/3 split is not available because it would cut through the pressed pattern.

Leading leaf handing

Choose whether your active leading door opens on the right or left hand side, viewed from outside. The leading leaf carries the key lock and opens first, while the secondary door remains held by internal top and bottom shoot bolts until released.

Door finish and colour

Choose from 32 low gloss powder coated colours. White (RAL 9016), Jet Black (RAL 9005) and Anthracite Grey (RAL 7016) are standard colours with no surcharge. The other 29 shades carry a small factory surcharge, with the full list available on the Specification tab.

Steel sub frame colour

The 50mm steel frame comes finished in white as standard. You can also specify the frame painted to match the door colour for a uniform look across the entire garage aperture.

Handle choices

Fitted as standard with a black locking handle, 3 cylinder keys and an internal turn handle. An upgraded cast aluminium black handle is available if you prefer a heavier, more tactile grip.

Bottom threshold weather seal

No seals are fitted to the base of the doors as standard. To reduce draughts and keep debris out, add an optional bottom seal:

• Brush seals (25mm or 50mm): Recommended if the driveway is block paved, tarmac or slightly out of level, because the bristles ride over high points without catching.
• Rubber blade seals (25mm or 50mm): Recommended on level, smooth concrete floors where you want a firm contact seal against rain and draughts.

Friction door stays

A pair of overhead friction door stays holds both leaves firmly at 90 degrees when open. Side hinged doors have wide surface areas that act like sails in a breeze; stays stop the doors blowing shut against your vehicle or straining the hinges.

Opening direction

Outward swinging as standard. Inward opening may be possible depending on internal wall clearances, so please contact us before ordering so we can check your garage layout.

Fitting without a steel frame

If you are retaining a sound timber frame already fitted to the brickwork, an unframed version can be supplied. Please phone or email us before ordering so we can confirm manufacturing sizes.

Technical Specification: Classic Harrowden Side Hinged Doors

Construction and framing

• Door panels: Single skin galvanised steel with pressed Georgian style raised cassettes. Welded steel bracing is fitted to the rear of the door leaves for enhanced strength and rigidity.
• Sub frame: 50mm box section steel frame with 50mm legs and a 50mm head. Arrives pre framed and fully assembled, available in white or finished to match the door panel colour.
• Finish: Low gloss powder coated finish over a rust resistant galvanised steel base.
• Insulation: None. These doors are uninsulated single skin steel.

Sizes and ordering

• Standard sizes: 15 standard sizes across five widths up to 2538mm and three heights up to 2184mm overall, suited to traditional UK garage apertures.
• Purpose made sizes: Manufactured to order up to 2750mm wide and 2340mm high overall.
• Ordering dimensions: Ordering sizes are the exact overall width and height including the steel frame. Clear internal frame opening is 100mm narrower and 50mm lower than your ordering size.

Configuration and operation

• Leaf split: Symmetrical 50/50 split only. The Georgian panels are pressed in four columns (two per leaf) meeting cleanly at the centre join. An asymmetric 1/3 and 2/3 split is not possible on this design as it cuts through the raised cassettes.
• Opening direction: Outward opening as standard. Inward opening may be possible depending on aperture details, please check with our team before ordering.
• Handing: Specify whether the active leading leaf is hung on the left or right, viewed from outside.
• Door stays: Friction stays available as an optional pair to hold leaves safely open in breezy conditions.

Locking and hardware

• Handles: Black exterior locking handle with 3 keys and an internal release handle. Upgraded cast aluminium black handle available.
• Active leaf locking: Two point steel shoot latches operated by internal cables, securing top and bottom into the frame.
• Passive leaf locking: Internal surface mounted shoot bolts at top and bottom.
• Hinges: Heavy duty fixed steel hinges with protective corrosion resistant coating.

Weather protection and seals

• No bottom seal supplied as standard. Optional 25mm (1 inch) or 50mm (2 inch) brush strips or rubber bottom seals can be specified to seal uneven floor levels.

Recommended duty

• Intended for domestic residential use, rated up to 5 operations (open and close) per day.

Colour choices

Available in 32 low gloss powder coated colours. Three standard shades are supplied without a surcharge.

Standard colours (no surcharge):

• White (RAL 9016)
• Jet Black (RAL 9005)
• Anthracite Grey (RAL 7016)

Special factory colours (surcharge applies):

• Signal Grey (RAL 7004)
• Dusty Grey (RAL 7037)
• Traffic Grey (RAL 7042)
• Light Grey (RAL 7035)
• Window Grey (RAL 7040)
• Basalt Grey (RAL 7012)
• Pebble Grey (RAL 7032)
• Iron Grey (RAL 7011)
• Slate Grey (RAL 7015)
• Graphite Grey (RAL 7024)
• Agate Grey (RAL 7038)
• Black Grey (RAL 7021)
• Steel Blue (RAL 5011)
• Cobalt Blue (RAL 5013)
• Sky Blue (RAL 5015)
• Gentian Blue (RAL 5010)
• Signal Blue (RAL 5005)
• Light Blue (RAL 5012)
• Moss Green (RAL 6005)
• Fir Green (RAL 6009)
• Chartwell Green (BS 14 C 35)
• Ruby Red (RAL 3003)
• Traffic Red (RAL 3020)
• Chocolate Brown (RAL 8017)
• Clay Brown (RAL 8003)
• Mahogany Brown (RAL 8016)
• Light Ivory (RAL 1015)
• Cream (RAL 9001)
• Traffic Yellow (RAL 1023)

* Screen colours are indicative only. Please confirm against a physical RAL swatch prior to ordering.

Installing Your GDO Classic Side Hinged Garage Door

Classic doors arrive pre framed and fully assembled, with both leaves hung in the steel frame and all latches, shoot bolts and keeps pre fitted at the factory. Installation mainly involves fixing the frame into the structural aperture, fitting the handle pack, and fine tuning the frame legs so the leaves meet cleanly at the centre stiles. A competent DIY installer can tackle this, but it is strictly a two person job because the doorset is heavy and awkward to handle alone.

You can download the full fitting instructions and our practical leaf adjustment guide.

Before you start

• Offer the complete doorset up to the opening to double check clearances. If you are fitting behind the brickwork, confirm the outward swinging leaves will clear the reveals, downpipes or external wall lights.
• A level floor across the threshold is essential. If the floor slopes or dips, the door leaves will bind or sit out of square at the top meeting stiles.
• Always keep an adult helper inside the garage until you have tested the latch mechanism, avoiding any risk of being locked out before adjustments are finished.

What is in the box

• Pre framed steel side hinged doorset
• 6 angled steel fixing brackets
• 12 self drilling tech screws and 12 coach screws (50mm)
• 24 M8 steel washers
• Exterior and interior handle pack with cylinder and 3 keys

You will also need 8mm masonry wall plugs, silicone sealant, and a light machine oil (such as 3-In-One). Basic tools required include a spirit level, tape measure, electric drill with masonry and driver bits, spanner set, screwdriver, protective gloves and eye goggles.

Step by step installation

1. Position the complete doorset into the opening, using wooden or plastic wedges to shim the frame temporarily. Use a spirit level on both legs and the head to ensure it sits plumb and square.
2. Secure at least three angled brackets to the rear of each frame leg, spaced evenly, using two self drilling tech screws per bracket.
3. Drill into the structural masonry and secure the brackets using the 50mm coach screws and 8mm wall plugs, fixing the unit securely without fully tightening.
4. Check how the door leaves meet across the top stiles and in the centre before final tightening. Shift the base of the frame legs slightly inwards or outwards until the visual lines and margins are uniform.
5. Slide the outer handle spindle through the active leaf, fit the interior handle, and secure with the washer and nut using the provided Allen key. Do not over tighten, as excessive force can deform the outer steel skin.
6. Apply light machine oil to the hinges, latch bolts, lock cylinder and cable linkages, then test the locking mechanism thoroughly from the inside.

Aligning the door leaves

Because side hinged garage doors are hand built fabricated units, slight tolerances between leaves are normal. You balance the final appearance simply by adjusting the frame legs before locking off your fixings:

• Both leaves slope down towards the centre: Move the bottom of both frame legs slightly inwards to lift the centre stiles.
• One leaf sits lower than the other: The frame has likely followed an uneven floor. Shim up the lower frame leg with a solid packer until both leaves level out.
• One leaf looks slanted: Move that specific frame leg slightly inwards or outwards at the base until the gap aligns.

* Leave your top wall fixings loosely engaged while adjusting the base of the frame to keep the assembly safe. If you run into difficulty getting the leaves square, contact our technical team and we can put you in touch with an approved local fitter (standard installation charges apply).

Installation Instructions are provided with every door.

Door is preassembled with the steel sub frame and all necessary furniture fitted ready to operate. Small on site adjustments should be all that is necessary once the door and frame is secured into the aperture
Delivery Guidance

GDO Classic Product Guarantee & Warranty

What is covered

• 2 year product guarantee: Covers all mechanical components and the steel door panels, provided the serial number label remains intact and clearly readable on the door.
• 2 year hardware warranty: Covers hinges, locks and latches under normal residential usage, defined as up to 5 complete open and close cycles per day.
• 2 year factory paint finish warranty: Covers factory applied powder coated finishes across our listed colour range against blistering, flaking or peeling.
• 10 year operational support: Original purchasers receive technical support, troubleshooting guidance, and availability of genuine replacement wear parts for up to a decade.

Any replacement parts supplied under warranty or purchased as spares carry a 6 month warranty or the remainder of the original product warranty period, whichever is longer. Steel operating cables are subject to standard wear inspection and carry a parts only guarantee.

Warranty requirements

• Guarantees apply strictly to installations within the United Kingdom.
• The door must be purchased through GarageDoorsOnline or an authorised retail partner, supported by proof of purchase and a registered serial number.
• Cover applies exclusively to the supplied doorset and factory frame, excluding surrounding building fabric, timbers or third party accessories.

Delivery and inspection procedure

Always inspect the doorset carefully upon arrival before signing the driver's delivery manifest. You have 3 business days from receipt to notify us of transit damage or missing components. Once a door is installed, it is deemed accepted in good condition and transit damage claims cannot be accepted.

What is not covered

• Damage caused by incorrect handling, improper storage, forced adjustment or poor installation
• Modifications or repairs carried out by unauthorised or non competent individuals
• Surface contact with aggressive agents such as mortar splash, plaster, harsh acids, road salt or bird lime
• Use of non genuine GDO components or non approved accessories
• General cosmetic wear, stone chips or environmental weathering that occurs after delivery

* Doors installed within 250 metres of open sea coastlines, salt estuaries or heavy industrial zones are exempt from the standard paint finish warranty due to airborne saline corrosion.

Understanding the factory paint finish

The front face of the door leaf is inspected for visual uniformity from a viewing distance of 3 metres in natural daylight. Minor surface variations or microscopic blemishes are standard across powder coated steel. The rear face of single skin panels carries a lighter primer or wash coat from the manufacturing line, which is standard across the garage door industry and does not affect corrosion resistance. Any stone chips or accidental paint scratches from everyday driveway use should be touched up promptly with matching enamel.

Routine maintenance and care

• Following installation, wipe down the face of the panels with a soft cloth to remove any microscopic steel swarf generated during drilling or packing.
• Wash the door panels every 3 months using warm water and a mild car shampoo, rinsing thoroughly with clean water. Never use abrasive cleaning pastes or solvent thinners.
• Every 3 months, lubricate all hinges, lock cylinders, internal latches and shoot bolts using a light household machine oil.
• Have the door checked and serviced annually by a competent tradesperson or garage door engineer.
• If the lock or latch mechanism begins to feel stiff or sluggish, adjust and lubricate it immediately to prevent being locked out.

Adherence to routine cleaning and maintenance guidelines is a condition of the manufacturer guarantee. When raising a warranty enquiry, contact your supplying dealer with your invoice details and the serial number found on the door edge. For doors over 12 months old, basic annual maintenance records may be requested.

You can download the full maintenance instructions and complete product guarantee terms.

Measuring for a Standard Size GDO Classic Side Hinged Door (Harrowden)

Our standard size GDO Classic Harrowden side hinged doors come in five widths and three heights, giving 15 standard sizes. These suit the most common single garage openings in the UK, so for many garages one of these sizes will fit without needing a purpose-made door.

The ordering size is the overall door and frame dimension. The factory-fitted steel frame has 50mm legs on both sides and a 50mm head, so the clear internal frame opening is 100mm narrower and 50mm lower than the ordering size.

For example, a 2234mm x 2184mm doorset gives a clear internal frame opening of 2134mm x 2134mm, which corresponds to the traditional 7ft 0in x 7ft 0in garage door reference size.

Standard size conversion table

The Harrowden design is supplied as a symmetrical 50/50 split only across all standard sizes.

How to measure your opening

• Measure the width at the top, middle and bottom of the structural opening, and use the smallest figure.
• Measure the height on both sides and in the centre from the underside of the lintel to the finished floor, and use the smallest figure.
• Check the floor is level across the opening. A level floor is essential for the door leaves to align properly and open freely.

Fitting in or behind the opening

In the opening: Choose an ordering size smaller than your smallest opening measurement, allowing approximately 10–20mm on the overall width and 5–10mm on the overall height so the frame can be fitted plumb, square and level.

Behind the opening: Choose an ordering size larger than the clear opening so the 50mm frame legs and head overlap the inner face of the brickwork. Check that the outward-opening leaves will swing clear of the reveals and downpipes.

* Outward swinging as standard. Always allow for fitting tolerance when ordering. If none of the standard sizes suit your opening, the Harrowden is also available purpose made up to 2750mm wide and 2340mm high.

For more help, see our measuring guide for side hinged doors.