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

Classic Harrowden Side Hinged Garage Door, Purpose Made Sizes

The purpose made Harrowden brings traditional Georgian panelled styling to garage openings that do not match standard UK dimensions. Twelve pressed raised cassettes are laid out across the doorset, providing the character of period timber doors in durable, powder coated steel.

This made to measure model is ideal for older homes, stone barns, and character properties where brickwork apertures vary from standard sizes, ensuring a neat, bespoke fit without clumsy timber packers or frame infills.

Why the Harrowden is 50/50 split only

The pressed cassettes are arranged in four columns, two on each leaf, so the doors meet cleanly in the centre. Because an asymmetric 1/3 and 2/3 split would cut straight through the panel layout, the Harrowden is manufactured as an equal 50/50 split only.

What is included

• Manufactured to your exact overall width and height dimensions, including the frame
• Pre framed and fully assembled in a 50mm box section steel frame
• Black exterior locking handle, 3 keys and an internal release handle
• Two point latches operated by internal steel cables, plus top and bottom shoot bolts
• Masonry fitting pack with angled brackets, coach screws and washers

Construction details

Single skin galvanised steel panels with pressed raised cassettes, finished in low gloss powder coat. Sturdy steel bracing across the rear prevents leaf flex. Corrosion protected fixed steel hinges hang the leaves within a 50mm box section steel frame, supplied in white or colour matched to your door panels.

Colour finishes

Choose from 32 powder coated colours. White, Jet Black and Anthracite Grey carry no surcharge, with 29 additional RAL options available to complement traditional joinery, masonry and exterior trim.

Measuring your opening

Enter the overall doorset width including both 50mm frame legs, and the overall height including the 50mm frame head, up to 2750mm wide and 2340mm high. These are exact manufacturing dimensions, so deduct your required fitting tolerance (usually 10 to 20mm on width and 5 to 10mm on height) from your brickwork opening before placing your order.

* Outward swinging as standard.

Customising Your Purpose Made Classic Harrowden Door

Every purpose made Harrowden door is manufactured to your exact opening dimensions, supplied pre framed and fully assembled. Here are the options to configure when ordering.

Custom dimensions

Enter the overall width and height of the complete doorset, including the 50mm steel frame, up to 2750mm wide and 2340mm high. These dimensions are used for manufacturing and pricing. Remember to deduct your required fitting tolerance (typically 10 to 20mm on width and 5 to 10mm on height) from your structural brickwork opening before ordering.

Door leaf arrangement

Supplied as an equal 50/50 split only. The Georgian raised panels are arranged in balanced pairs on each leaf, meeting cleanly at the centre meeting stile. An asymmetric split cannot be made on this design without bisecting the pressed cassettes.

Leading leaf handing

Decide whether the active lead door is hung on the left or the right hand side, viewed from outside. The active leaf opens first using the handle, while the secondary slave door is held in place by internal shoot bolts at the top and bottom.

Door finish and colour

Available in 32 factory finished powder coated colours. White (RAL 9016), Jet Black (RAL 9005) and Anthracite Grey (RAL 7016) carry no surcharge. The other 29 colours carry a small surcharge.

Steel sub frame colour

The 50mm steel sub frame is finished in white as standard, or you can have it powder coated to match the colour of your door panels.

Handle choices

Fitted as standard with a black composite locking handle, 3 keys and an internal release handle. A die cast aluminium black handle is available as a heavier, robust upgrade.

Bottom threshold weather seal

Classic doors arrive without bottom seals. To keep wind, dust and leaves out of the garage, choose an optional bottom seal:

• Brush seals (25mm or 50mm): Best on tarmac, block pavers or uneven floor screeds, as the bristles flex naturally across high spots.
• Rubber blade seals (25mm or 50mm): Best on flat, smooth concrete floors to provide a close weather seal.

Friction door stays

An optional pair of friction stays fits to the top of the frame to hold both door leaves steady in the open position. They prevent doors catching the wind and swinging back onto parked cars or people walking through.

Opening direction

Outward swinging as standard. Inward opening can be arranged on request, but please get in touch with our team before ordering to verify opening clearances.

Fitting without a steel frame

If you are hanging the leaves directly into an existing structural timber sub frame, an unframed doorset can be supplied. Please contact us before submitting your order.

Technical Specification: GDO 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 Purpose Made Classic Side Hinged Door (Harrowden)

Purpose made doors are built to your exact overall width and height, up to 2750mm wide and 2340mm high. The ordering width is the overall external width including both 50mm frame legs, and the ordering height is the overall external height including the 50mm frame head. Pricing is calculated directly from these overall dimensions.

The factory-fitted steel frame is 50mm all round, so the clear internal frame opening will be 100mm narrower and 50mm lower than the ordering size you enter.

These are exact manufacturing sizes with no deductions made at the factory. Please deduct your required fitting tolerance from your structural opening measurements before placing your order.

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 lintel to finished floor, and use the smallest figure.
• Check the floor is level across the full opening width. A level floor is essential for the door leaves to operate smoothly and align correctly.

Fitting in or behind the opening

In the opening: Deduct a fitting tolerance from your smallest opening measurements (typically 10–20mm on width and 5–10mm on height) so the frame can be installed plumb, square and level.

Behind the opening: Order larger than the clear structural opening so the 50mm frame overlaps the inner face of the brickwork, and verify that the outward-opening leaves swing clear of reveals or downpipes.

Size range

The Harrowden design is manufactured as a 50/50 split only, on every size.

* Outward swinging as standard. Ensure there is unobstructed space on the driveway for both leaves to open fully.

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