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

GDO Classic Highworth Side Hinged Door, Purpose Made Sizes

The purpose made Highworth combines traditional coach house panel detailing with bespoke sizing. Three pressed columns, each featuring a short top cassette, a tall centre panel and a lower base panel, give the door the character of classic timber carriage doors in low maintenance powder coated steel.

This made to measure model is popular on character properties, converted coach houses and stone outbuildings where openings rarely match standard UK imperial dimensions, giving a clean, tailored finish without messy frame infills.

Why the Highworth is 1/3 and 2/3 split only

Because the panel layout is pressed in three equal columns, the split line falls naturally one third of the way across the opening. One column sits on the narrow pedestrian door and two sit on the wider door. A 50/50 split would cut through the middle column, so the Highworth is produced strictly as an asymmetric 1/3 and 2/3 split.

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 and reinforced with steel bracing across the rear. Fixed steel hinges with protective corrosion plating carry the leaves inside a 50mm box section steel frame, supplied in white or colour matched to your door panels.

Colour finishes

Available in 32 powder coated colours. White, Jet Black and Anthracite Grey carry no surcharge, with 29 additional RAL factory shades available.

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 structural opening before placing your order.

* Outward swinging as standard.

Customising Your GDO Classic Highworth Door

Every Highworth and Kingham doorset arrives pre framed and fully assembled, featuring pressed raised panels (with arched upper panels on the Kingham). Here are the options to configure when placing your order.

Ordering size

Choose from 15 standard sizes across five widths (2081mm, 2183mm, 2234mm, 2386mm and 2538mm) and three heights (1980mm, 2031mm and 2184mm). These are the overall outside dimensions of the door and steel frame combined. See the Measure tab to confirm the clear drive through clearance each size provides.

Door leaf arrangement

Supplied exclusively as an asymmetric 1/3 and 2/3 pedestrian split. The pressed cassettes are laid out in three columns, with one column on the narrow door and two on the wider door. A 50/50 split is not available because the centre join would run directly through the middle cassettes.

Leading leaf handing

Choose whether the narrow pedestrian leaf is positioned on the left or the right hand side, viewed from outside. The narrow leaf is always the active leading door that carries the handle, giving quick everyday access on foot without having to unbolt the large door.

Door finish and colour

Choose from 32 low gloss powder coated finishes applied over galvanised steel. White (RAL 9016), Jet Black (RAL 9005) and Anthracite Grey (RAL 7016) are standard colours without a surcharge. The other 29 factory finishes carry a small surcharge, as listed in the Specification tab.

Steel sub frame colour

The 50mm steel box frame comes in powder coated white as standard, or it can be colour matched to your door leaf for a cohesive look across the opening.

Handle choices

Comes with a black locking handle, 3 cylinder keys and an internal turn lever. You can upgrade to a cast aluminium black handle for a sturdier, heavier feel.

Bottom threshold weather seal

Doors are manufactured without a bottom threshold seal as standard. We recommend adding a bottom seal to prevent wind, rain and leaves blowing inside:

• Brush seals (25mm or 50mm): Ideal if your driveway has uneven brick pavers, tarmac or slight dips, as the bristles sweep across high spots without catching.
• Rubber blade seals (25mm or 50mm): Best on a smooth, level concrete floor to form a tight weather barrier against draughts.

Friction door stays

An optional pair of top mounted friction stays holds both the narrow and wide leaves open at 90 degrees. These prevent the doors from moving in breezy conditions and keep the opening clear when moving vehicles or large equipment in and out.

Opening direction

Outward swinging as standard. If your layout requires inward opening, please speak with us prior to ordering so we can confirm the necessary clearances.

Fitting without a steel frame

If you prefer to hang the door leaves directly into an existing structural timber frame, an unframed doorset can be supplied. Contact us before ordering so we can confirm leaf dimensions and hinge compatibility.

Customising Your Purpose Made GDO Classic Highworth Door

Every purpose made Highworth and Kingham door is manufactured to your exact opening dimensions, complete with a factory assembled steel frame. Here are the options to select when ordering.

Custom dimensions

Enter the overall doorset width and height, including the 50mm steel frame, up to 2750mm wide and 2340mm high. These dimensions govern manufacturing and pricing. Remember that these are exact manufacturing sizes; deduct your required fitting tolerance (typically 10 to 20mm on width and 5 to 10mm on height) from your structural opening measurements before submitting your order.

Door leaf arrangement

Manufactured as an asymmetric 1/3 and 2/3 split only. The pressed raised panels (arched on the Kingham) are arranged in three columns across the opening. One column sits on the narrow access door and two on the wide secondary door. A 50/50 split cannot be produced on this design without cutting through the pressed cassette detail.

Leading leaf handing

Choose whether the narrow pedestrian door is hung on the left or the right hand side, viewed from outside. The narrow leaf is the active door that opens first, making it easy to grab bikes, bins or gardening tools without opening the main leaf.

Door finish and colour

Available in 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 factory finishes carry a small surcharge.

Steel sub frame colour

The 50mm steel frame is supplied in white as standard, or it can be finished in the same powder coated colour as the door panels.

Handle choices

Supplied with a black locking handle, 3 cylinder keys and an internal release handle. A cast aluminium black handle is available as a heavier, robust upgrade.

Bottom threshold weather seal

Doors are manufactured without bottom seals as standard. To reduce draughts and keep debris out, choose an optional bottom seal:

• Brush seals (25mm or 50mm): Recommended if the driveway is block paved, tarmac or slightly out of level, because the flexible bristles glide over high spots without binding.
• Rubber blade seals (25mm or 50mm): Recommended on flat, smooth concrete floors where you want a neat draught excluder across the threshold.

Friction door stays

A pair of overhead friction door stays fits to the top of the frame to hold both door leaves steady in the open position. Stays protect your vehicle from windblown doors swinging shut while driving through.

Opening direction

Outward swinging as standard. Inward opening can be arranged on request, but please contact us before ordering to confirm inside clearance and headroom.

Fitting without a steel frame

If you are retaining a sound timber frame already fitted to the brickwork, an unframed doorset can be supplied. Please call or email us before ordering so we can confirm sizes and fixing points.

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 GDO Classic Side Hinged Door (Highworth)

Purpose made doors are manufactured to the exact overall width and height entered at the time of order, up to 2750mm wide and 2340mm high. The ordering width is the overall width including both 50mm frame legs, and the ordering height is the overall height including the 50mm frame head. Pricing is calculated directly from these overall dimensions.

The steel sub-frame is 50mm all round, meaning the clear internal frame opening will be 100mm narrower and 50mm lower than the overall ordering size specified.

These ordering figures are exact manufacturing dimensions with no built-in allowances. Deduct your required fitting tolerance from your structural opening measurements before placing your order.

How to measure your opening

• Measure the structural width at the top, middle and bottom of the opening, and record the smallest measurement.
• Measure the height on both sides and in the centre down to the finished floor level, and record the smallest measurement.
• Check the opening is square and the floor is level across the entire opening. A level floor prevents the leaves from binding or catching.

Fitting in or behind the opening

In the opening: Order smaller than your smallest opening dimensions to provide sufficient fitting tolerance (typically 10–20mm on width and 5–10mm on height) so the frame fits plumb, square and level.

Behind the opening: Order larger than the clear structural opening to ensure the 50mm frame overlaps the brickwork, and verify that the outward-opening leaves will swing completely clear.

Size range

The Highworth and Kingham models are supplied exclusively as a 1/3–2/3 split on all purpose-made sizes.

* Outward swinging as standard. Check that clear opening space is available on the driveway outside.

For full installation diagrams and step-by-step instructions, view our measuring guide for side hinged doors.