The Garador Grantham is a timber up and over garage door from the Elizabethan Range.
The door is constructed from solid red cedar and plywood and built around a strong box section chassis for rigidity.
- Canopy or Retractable Mechanism
- UK Manufactured
- Crafted from the highest quality timber
- Factory finish options
- Related Downloads
- Garador Canopy Door Fitting Instructions
- Garador Retractable Doors Fitting Instructions
- Garador Retractable Plus
- Garador Up and Over Doors Brochure
- How to maintain your garage door
- GaraMatic Operators
- Garador Garamatic 9 (Series 4) Installation Instructions
- Garador Garamatic 10 and 20 Operators Installation Instructions 1
- Garador Garamatic 10 and 20 Operators Installation Instructions 2
Garador Grantham Timber Up and Over Door
The Grantham features four tall recessed panels with softly rounded upper corners, framed by solid cedar stiles and rails. It is a balanced, traditional look that works well with brick, stone, and rendered properties, giving the door depth without over-fussy detailing. Part of the Garador Elizabethan range, it combines machined solid red cedar framing with exterior grade plywood backing panels.
Timber Appearance with Steel Chassis Support
Timber doors naturally respond to changes in weather and humidity. To prevent twisting and sag, the Grantham panel is built into a rigid galvanised steel box section chassis. The steel framework takes the structural load and connects directly to the operating gear, so the mechanical strain is not carried by the timber joints alone.
For the easiest and most reliable installation, we recommend ordering the door with the factory-fitted steel box-section subframe. When ordered this way, the door arrives pre-hung with the lifting gear already mounted to the frame. It eliminates the need for separate timber goalpost frames, speeds up fitting on site, and ensures the tolerances around the door leaf remain square.
Operating Gear and Remote Control Automation
The Grantham single door is available with either counterbalance canopy gear or retractable lifting gear. It is counterbalanced for smooth manual operation, so adding an electric motor is a lifestyle choice rather than a necessity.
If you plan to automate the door, choose retractable gear wherever possible. Retractable gear links directly to a ceiling-mounted boom operator for the smoothest travel. Canopy gear can be motorised, but it requires an additional canopy bow arm converter fitted to the back of the leaf, which takes up extra headroom inside the garage.
Compatible Garador GaraMatic electric operators include:
- GaraMatic 9: 750N peak force, travel speed up to 20cm/sec, integral 10-LED courtesy light, and two 4-button hand transmitters. Compatible with the Garador BlueSecur smartphone app via an optional receiver.
- GaraMatic 10: 800N peak force, travel speed up to 25cm/sec, integral 20-LED courtesy light, built-in Bluetooth receiver for BlueSecur app control, and a partial opening ventilation position.
- GaraMatic 20: 1000N peak force, travel speed up to 25cm/sec, integral 30-LED lighting array, and direction-of-travel light signalling. A heavy-duty option for high-frequency daily use, though the GaraMatic 9 or 10 handles single doors comfortably.
* Achievable travel speed and motor suitability depend on the ordering width, operating gear, and site headroom. Always confirm your garage clearances prior to ordering.
Handle-Free Option for Electric Doors
When ordered with electric operation, the Grantham can be specified without an external black handle or pre-drilled handle hole. This leaves the natural face of the cedar panels completely clean.
* If your garage has no secondary pedestrian door, an external emergency key release is essential. You will either need to retain the external locking handle to operate the release cable or fit a dedicated manual barrel release through the door face before automating.
Sizes and Factory Timber Finishes
Standard single ordering widths run up to 8ft with canopy gear (up to 7ft high). Wider single sizes, including 9ft and 10ft widths, are supplied exclusively with retractable operating gear to handle the panel weight safely. Purpose-made sizes are also available on request if your brick opening does not suit standard dimensions.
The Grantham can be ordered in a neutral base coat ready for your own staining on site, or fully factory-finished in one of six protective wood stains: Light Oak, Antique Oak, Mahogany, Walnut, Chestnut, or Ebony. Chassis frames are supplied in coordinating brown or white powder-coat finishes. Because cedar is a natural timber, grain density and colour tones vary between boards; sample swatches should be treated as a tonal guide rather than an exact match.
Customise Your Garador Timber Up and Over Garage Door
Once you choose your nominal door width and height, the ordering drop down menu shows the operating gear available for that size. Single doors up to 8ft wide (2438mm) give you the choice of canopy or retractable gear. Single doors over 8ft wide and double width doors up to 16ft wide (4877mm) are supplied on retractable gear only to carry the heavier timber leaf safely and smoothly.
After confirming your dimensions and lifting gear, you can specify your finish, steel chassis, fixing frame, hardware and automation options below.
1. Factory Finished Door Colour Options
All Garador timber panels are built from quality Western Red Cedar. You can specify your timber finish in one of two ways:
- Neutralising Base Stain: Supplied dipped in a base coat as standard, ready for you to finish on site in your chosen microporous exterior wood stain before or immediately after installation.
- Factory Fully Finished: Treated at the factory with a durable microporous timber preservative in your choice of six wood stains: Light Oak, Antique Oak, Mahogany, Walnut, Chestnut or Ebony.
* In a perfect world we recommend the factory finish. It ensures every joint, tongue and rebate is protected before assembly and saves you significant preparation time on site.
2. Steel Chassis Colour
Every Garador timber door leaf is built around an internal galvanised box section steel chassis that provides structural rigidity. You can choose the powder coated colour of this rear chassis to complement your garage interior or sub frame:
- Traffic White (RAL 9016): Clean and bright, ideal if your garage walls are painted or rendered white.
- Terra Brown (RAL 8028): A dark brown finish that blends naturally with darker timber stains and timber sub frames.
3. Factory Fitted Steel Fixing Sub Frame
We highly recommend the Garador steel fixing frame as it offers the tightest tolerance around the edge of the door panel, creating a faster and neater fit compared to a standard timber subframe.
Because standard single doors arrive factory pre framed with the door panel, lifting arms and springs already mounted inside the steel box section frame, you do not need to assemble timber jambs or hang individual mechanism brackets from scratch. It also eliminates timber rot issues down at floor level. Finished in White or Terra Brown to match your chassis.
If you prefer to use an existing sound timber frame or fit a new timber frame of your own, choose without steel frame. The internal opening dimensions of your timber frame must match the door ordering dimensions exactly.
Canopy mechanism with steel frame |
Retractable mechanism with steel frame |
4. Choose Handle Option
Choose either a black nylon handle or a high quality diecast metal handle in white, brass or chrome effect.
- Black Nylon Handle: Durable black composite handle set supplied as standard with two point internal rod locking.
- Diecast Metal Handles: Upgrades available in white powder coat, chrome effect or brass effect to suit period ironmongery or front door fittings.
- No Handle / Un-drilled Panel: If you are automating a retractable door from day one, you can order the door leaf plain with no external handle or keyhole for a cleaner visual appearance.
* Note: If your garage has no other entrance and you are fitting an electric operator, keep the handle prep so you can fit an external manual release kit through the lock hole.

5. Extra Security Locking
For manually operated doors we offer the option to upgrade to a 4 point locking rod system for improved security and resistance to forced entry. Combined with a steel sub frame the Garador locking rod system utilises the steel closing lip along with steel plates to prevent easy access to the internal locking catches for the door.
The improved security of a locking latch in each corner protects against forced entry.
Suitable for retractable gear options the electric operated 'De Latch Security Locking' system works with the existing manual locking mechanism, and the remote control operator, by connecting with a mechanical latching system to provide 3 point locking security.
The 'De Latch Security Locking' system is not suitable for canopy doors.
6. Remote Control Electric Operator
Complete with two hand transmitters the Garamatic 9 electric operator is reliable, secure and offers excellent value for money. The operator is maintenance free and creates a super smooth and quiet door. Other features include a manual override option, for the event of power failure, an integral LED light with 10 LEDs to combine for low power consumption and it complies with the latest European safety standards. Short K boom is included with this motor, it will be suitable for doors up to 2500mm high.
- GaraMatic 9: 750N peak force, 20cm per second speed, integrated 10 LED courtesy light. Ideal for single timber doors up to 8ft wide.
- GaraMatic 10: 800N peak force, 25cm per second speed, integrated 20 LED light, integrated Bluetooth receiver for smartphone control and a two digit display. The recommended choice for larger single timber doors.
- GaraMatic 20: 1000N peak force with heavy duty drive capacity, designed specifically for double width timber doors up to 16ft wide or doors in frequent daily use.
* Canopy doors require an optional canopy bow arm conversion kit if being automated with a GaraMatic 9, but retractable gear is always the preferred route for electric operation.
7. Emergency External Release
Required for garages without alternative means of access to the garage. This system attaches a cable internally, within the garage, and offers a way to externally disconnect the remote control operator towing arm, perfect in the event of a power failure.
Turning the key from outside disengages the trolley drive mechanism so you can lift the door by hand and avoid being locked out during power cuts.
Technical Specification: Garador Timber Up and Over Garage Doors
Every Garador timber up and over garage door combines the warmth and character of real wood with the structural strength of an internal steel chassis. Unlike traditional joinery doors that rely solely on timber framing, Garador panels are built within an engineered box-section steel sub-frame to maintain squareness, prevent distortion, and handle mechanical operating stresses reliably.
Full manufacturing specifications, gear clearances, frame options, and hardware data are detailed below.
Panel Construction and Materials
Garador timber up and over doors are manufactured in Yeovil, Somerset, using two established timber construction methods:
- Solid Red Cedar Range: Constructed purely from solid Western Red Cedar boards using tongue and groove joints (such as Vertical Cedar, Horizontal Cedar, Hampton, Kingsbury, Barrington, and Chevron Cedar). Red cedar is naturally resistant to decay and offers fine grain character without excessive weight.
- Elizabethan Range: Constructed from exterior-grade marine plywood infill panels set into solid Western Red Cedar framework and rails (such as Grantham, Bosworth, and Hinton). This technique delivers traditional recessed panelled depth while keeping the door leaf lightweight and balanced.
- Rear Steel Chassis: All panels are mounted directly onto a galvanised box-section steel backing chassis, factory finished in either Traffic White (RAL 9016) or Terra Brown (RAL 8028). The chassis carries the mechanical operating gear, hinges, cables, and locking rods, ensuring the timber panel is never subjected to torsional twisting.
- Glazed Models: Glazed apertures (featured on Sandhurst, Ashton, Rochdale, and Hinton) are factory fitted with durable 4mm safety glass, available in Plain, Georgian leading, or Diagonal leading patterns.
Factory Finishes and Timber Treatment
Because timber is a natural living material, correct surface protection is essential for long-term performance and warranty validity:
- Neutralising Base Stain: Supplied dipped in a protective base-coat stain as standard. The door must receive a high-grade microporous exterior wood stain to all six faces and edges (front, back, sides, top, and bottom) immediately upon unwrapping and fitting.
- Factory Fully Finished: Factory treated with an industrial microporous timber finish that penetrates deep into the timber grain and tongue joints. Available in six wood tones: Light Oak, Antique Oak, Mahogany, Walnut, Chestnut, and Ebony.
- Maintenance: Periodic re-treatment with a microporous finish is required depending on sunlight exposure and weather aspect. Film-forming varnishes, gloss paints, or non-microporous polyurethane treatments should not be used.
Operating Mechanisms and Clearances
Operating gear is matched to the door width and height to guarantee smooth, balanced lifting:
- Canopy Operating Gear: Available on single door sizes up to 2439mm wide (8ft 0in) and 2136mm high (7ft 0in). Counterbalanced by an overhead zinc-coated torsion spring on cast alloy cable drums. About one-third of the door panel projects outside the opening when fully open. No tracks run into the garage ceiling. Nominal drive-through width is reduced by 40mm; nominal drive-through height is reduced by 130mm.
- Retractable Operating Gear: Available on single doors up to 2439mm wide and standard on all single doors over 8ft wide and double-width doors up to 4877mm wide (16ft 0in). The door glides completely inside the garage on horizontal steel tracks supported by suspension brackets. Multiple counterbalanced spring cassettes provide smooth operation and finger-trap protection. Nominal drive-through width is reduced by 105mm; nominal drive-through height is reduced by 110mm on single doors (140mm on double doors).
- Optional Retractable Plus Gear: Available on single door heights of 1931mm, 1981mm, and 2136mm up to 2284mm wide (7ft 6in). Specially curved pivot link arms and low-profile bottom spring brackets lift the mechanism clear of the drive-through opening at wing-mirror height, maximising usable vehicle entrance width.
Sub-Frame Options and Fitting Tolerances
Up and over doors must always be mounted within a dedicated sub-frame:
- Factory-Fitted Steel Box-Section Frame: Fabricated from 10-gauge galvanised steel, pre-finished in White or Terra Brown to match the door chassis. The frame arrives pre-assembled with the door panel and operating gear, cutting on-site installation time significantly. Profile sizes are 75mm x 60mm (standard retractable and canopy) or 60mm x 60mm (narrow canopy option where aperture width is tight).
- Timber Sub-Frame (Fitted to Existing/New): When hanging the door to a structural timber frame (minimum 70mm x 70mm timber recommended), the internal daylight opening width and height of the timber frame must exactly match the nominal ordering dimensions of the door.
- Installation Tolerances: When installing a complete steel frame assembly between brickwork reveals, allow 10mm to 15mm overall tolerance across the width and 5mm to 10mm across the height.
Security Locking and De-Latch Kits
Garador doors feature robust manual locking engineered directly into the steel chassis:
- Standard 2-Point Locking: Internal steel rods activate rotary latches into the side frame keep plates, operated by a secure euro-profile cylinder. Supplied with a standard black nylon handle set.
- Optional Diecast Handles: Heavy-duty diecast metal handle upgrades available in White powder-coat, Brass effect, or Chrome effect.
- Optional 4-Point Locking: Available on manual doors only. Adds steel locking shoot bolts into all four panel corners for enhanced resistance against lever attacks.
- De-Latch Security Locking Kit: When an electric operator is fitted to a retractable door, the motor holds the top of the door closed, but the mechanical side latches are normally disengaged. Fitting an optional mechanical de-latch kit connects the electric operator to the door’s existing side rotary catches, latching the bottom corners mechanically every time the motor closes. (Suitable for retractable gear only; not compatible with canopy doors).
Electric Automation Options
Retractable timber doors pair directly with Garador Series 4 GaraMatic electric operators, conforming fully to BS EN 13241 safety regulations:
- GaraMatic 9: 750N peak force, 20cm/sec running speed, integrated 10-LED lighting, supplied with two 4-button hand transmitters (868MHz BiSecur frequency). Best suited to single doors up to 8ft wide.
- GaraMatic 10: 800N peak force, 25cm/sec running speed, integrated 20-LED lighting, built-in Bluetooth receiver compatible with the Garador BlueSecur smartphone app, and diagnostic display. Recommended for heavier single timber panels.
- GaraMatic 20: 1000N peak force, 25cm/sec running speed, 30-LED lighting. Engineered specifically for double-width doors up to 16ft wide or garages with high daily duty cycles.
- External Manual Release: Strongly recommended on any automated door where there is no secondary pedestrian entrance into the garage. A keyed lock mechanism allows you to release the drive trolley from outside during a power cut.
Manufacturer Warranty Cover
Garador timber garage doors are backed by manufacturer warranty terms based on standard domestic use (up to 5 door operations per day):
- 10-Year Limited Warranty: Covers the safe and reliable function of the door mechanism and factory steel sub-frame.
- 5-Year Guarantee: Covers mechanical wear items including torsion/extension springs, steel wire cables, track rollers, guide wheels, and hinges.
- 2-Year Limited Warranty: Covers the timber door panel itself, conditional on proper sealing, finish maintenance, and avoidance of moisture penetration as specified in the Garador maintenance handbook.
Garador Timber Up and Over Garage Door Installation Guidance
Fitting a Garador timber up and over door is straightforward, provided you understand the gear type, frame choice, and door weight before starting. Single doors up to 8ft wide (2438mm) are available with either canopy or retractable operating gear. Single doors over 8ft wide and all double width doors up to 16ft wide (4877mm) are supplied on retractable operating gear only, as horizontal tracking and heavy duty spring sets are required to manage the wider, heavier timber panels safely.
Doors can be ordered with a factory fitted steel box section sub frame or prepared for hanging to a suitable timber sub frame. If you are fitting to a timber sub frame, remember that the internal opening dimensions of your timber frame must match the Garador ordering dimensions of the door.
1. Timber Care Before Installation
Garador timber doors are built around an internal galvanised steel box chassis, but the timber facing itself requires proper care on site.
- Inspect the panel before fitting to ensure it has not picked up transit moisture or surface scuffs.
- If your door arrived in standard neutralising base stain, apply a microporous exterior wood stain to all six sides, including the front face, rear face, top, bottom, and side edges, before or immediately after installation.
- Never leave bare timber exposed to damp conditions or rain before sealing, as untreated timber will absorb water and increase panel weight unevenly.
* In a perfect world we recommend ordering the factory finished option, but if you are staining on site, make sure you seal the bottom edge thoroughly before the door is hung close to the floor.
2. Choosing Your Frame Type and Fitting Position
You can fit a Garador timber door using either a factory fitted steel frame or an existing or new sound timber frame:
- Factory fitted steel box section frame: The cleanest and quickest solution. The frame arrives pre assembled with the door leaf and operating gear already aligned. It eliminates timber rot issues at the threshold and provides narrow or standard profile options depending on your gear type.
- Timber sub frame: The door is supplied with hardware loose or prepared for fixing into a suitable structural timber sub frame, with a minimum size of 70mm by 70mm recommended. Your internal timber frame opening width and height must match the nominal door ordering size exactly. The timber frame must be square, plumb, and treated against rot.
Both frame types can be installed in one of two positions:
- Between the brickwork opening: The frame sits inside the structural reveals. The visible frame uprights and head take up space, so your clear drive through access is reduced by the frame thickness.
- Behind the brickwork opening (face fix): The frame fixes to the internal faces of the brick piers and lintel. This maximises drive through width and height by keeping the frame out of the brick reveal opening.
* Always remember: When fitting between brickwork, allow at least 10mm to 15mm tolerance across the width and 5mm to 10mm on the height to ensure the frame fits without forcing.
3. Checking Openings and Floor Levels
Before offering the door or frame into place, carry out these essential opening checks:
- A level floor is essential for the best results: Up and over doors travel in a fixed arc, so an uneven floor across the threshold will leave gaps at one corner or cause the bottom weatherseal to scrape.
- Check reveals for plumb and square: Take cross corner diagonal measurements across the brick opening or timber sub frame. Discrepancies must be packed out behind the frame rather than forcing the frame out of square.
- Internal depth and joist positions: Retractable single and double doors require clear horizontal depth into the garage equal to the door height plus at least 350mm, or more if adding an electric operator. Ensure light fixtures, roof rafters, and side shelving do not obstruct track runs.
4. Installing the Door and Frame Assembly
Due to the weight of solid red cedar panels, always ensure you have two people on hand for single doors, and three people for wider double doors.
- With a factory steel frame: Offer the complete door leaf and steel sub frame into the opening together. Wedge temporarily in place, check the head is level and the vertical side legs are plumb, then fix using the heavy gauge steel universal brackets supplied.
- With a timber frame: Fix the timber frame securely to the masonry reveals first, ensuring the internal frame opening exactly matches the ordering dimensions. Offer the door leaf into the timber frame opening and secure the side bearing plates and gear brackets at the factory specified heights.
- Do not over tighten masonry fixings until you have verified that the frame legs remain parallel from top to bottom. A bowed frame leg will cause the timber door panel to bind against the side rebates.
5. Operating Gear Setup
The setup routine depends on the door size and lifting mechanism specified:
- Canopy gear (single doors up to 8ft or 2438mm wide only): With the frame fixed square and upright, check that the steel lifting cables run correctly in the cast alloy overhead drum grooves. Carefully release transit clips to transfer tension to the overhead torsion spring, and check that the anti drop safety catch operates freely.
- Retractable gear (doors up to 8ft wide, and all doors over 8ft up to 16ft wide): Once the front frame is secured, raise the horizontal tracks into the garage. Fix the rear of each track to ceiling joists using the slotted steel suspension brackets supplied. Tracks must be set level, square to the frame head, and parallel to each other to prevent top rollers from pinching. Multiple spring cassettes along the side arms provide the balance for heavier timber panels.
6. Electric Automation and Safety Setup
Timber doors add weight over standard steel doors, making correct operator pairing important:
- Retractable doors up to 8ft wide are ideal for a GaraMatic 9 operator; larger single doors and double doors up to 16ft wide should be paired with a GaraMatic 10 or GaraMatic 20 to handle the heavier timber panel comfortably.
- Canopy doors can only be automated using an optional canopy bow arm conversion kit, but we always recommend specifying retractable gear from the outset if you want remote control.
- Mount the operator boom centrally above the door panel and fix the towing arm to the top panel bracket.
- Deactivate manual locking catches before connecting the motor so the operator is not pulling against locked rods.
- If the garage has no other personal access door, fit an external manual release kit so you can release the motor and enter during a power cut.
- Test the door by hand first. It should balance cleanly halfway through its travel. Once manual movement is smooth, connect the motor and run the automatic safety reversal limit learning cycle.
Garador Up and Over Garage Door Warranty Information
When you purchase a Garador garage door through GarageDoorsOnline, you receive genuine UK factory backed warranty cover provided directly by the manufacturer, Garador Ltd (part of the Hormann Group). As an approved specialist distributor, GarageDoorsOnline manages your order, delivery, and initial aftercare support, while the formal product guarantee sits with Garador from the date of purchase.
| Covered Item | Warranty Period | Scope of Cover |
|---|---|---|
| Steel Subframe and Chassis | 10 Years | Structural integrity of the steel box section fixing frame, door chassis, and general mechanical function |
| Operating Components | 5 Years | Springs, wire lifting cables, track rollers, hinges, and guide wheels in normal domestic use (up to 5 cycles per day) |
| GaraMatic Electric Operators | 5 Years | Operator mechanics, motor gearbox, and electronic control boards (radio remote hand transmitters: 2 years) |
| GRP Door Panel Skin | 2 Years | Composite face integrity against blistering, delamination, or manufacturing material defects |
| Factory Replacement Spares | 6 Months | Genuine replacement parts, or the remainder of the original product warranty period, whichever is longer |
Summary of Garador Warranty Conditions
Garador warrants its products to be free from manufacturing and material defects. In the event of a proven fault during the warranty period, Garador undertakes at its discretion to repair the defective part, exchange the component, or offer an allowance.
To keep the manufacturer warranty valid, please note the following practical requirements:
- Domestic usage: The 5 year running gear guarantee is based on normal domestic operation, defined as no more than 5 complete open and close cycles per day.
- Correct installation: The door and steel subframe must be installed square, plumb, and without distortion in accordance with Garador official fitting instructions.
- Routine maintenance: Operating gear, pivot points, track rollers, and spring latches must be inspected and lubricated periodically using light acid free oil. Do not grease the plastic guide tracks.
- Panel care: The GRP face must be washed down periodically with warm water and a soft sponge. Never apply paint, harsh solvent cleaners, or abrasive polishes to the composite gel coat. Bird droppings must be washed off promptly to prevent chemical bleaching.
- Coastal environments: If the door is fitted near the coast or in areas with airborne salt deposits, more frequent cleaning is required to prevent surface deposits from attacking metal hardware.
- Weather expectations: Up and over doors are designed to deflect rainwater and wind, but they are not certified as sealed watertight closures. Small perimeter gaps required for clearance do not constitute a defect.
What the Warranty Does Not Cover
The guarantee applies strictly to the manufactured product and does not cover:
- Normal fair wear and tear on consumable parts such as lock cylinders, guide runners, and weather strips.
- Faults caused by improper installation, twisted jambs, unlevel thresholds, or inadequate fixing into non structural wall materials.
- Mechanical damage caused during site transport, improper handling, forced entry, or accidents.
- Modifications or repairs carried out using non genuine Garador parts.
- Secondary costs, including labour charges for dismantling or refitting replacement parts, hire of temporary access equipment, or third party site contractor fees.
How Claims are Handled
Because you purchased through GarageDoorsOnline, you do not need to contact the factory cold. Simply get in touch with our customer service team with your original order reference, delivery postcode, a brief description of the issue, and clear photos showing the door panel, the data label on the frame, and the component in question. We will log the claim with Garador technical services on your behalf and coordinate the supply of replacement parts or manufacturer inspection.

Measuring Guide: Garador Timber Single Up and Over Garage Doors
Garador single up and over garage doors are ordered by their nominal internal opening dimensions in feet and inches or millimetres. The internal frame dimension represents the clear daylight opening inside the subframe jambs, while the overall frame dimension includes the factory fitted steel frame profiles.
Before ordering, decide whether your door will be fitted between the brickwork reveal or fitted to the inside face behind the opening, as this determines which dimensions you need to match.
How to Measure Your Structural Opening
Always use a steel tape measure and record every dimension in millimetres:
- Width: Measure the brick to brick opening width at the top, middle, and bottom. Record the smallest measurement.
- Height: Measure from the finished garage floor up to the underside of the lintel at the left, centre, and right. Record the smallest measurement.
- Squareness: Measure diagonally from corner to corner across the opening. Equal diagonals confirm the opening is square. If the diagonals differ significantly, you will need to allow extra tolerance when fitting between the brickwork.
- Floor Level: Check the floor across the structural opening with a long spirit level. Because timber panels are built square, any slope in the floor will leave an uneven gap under the bottom weatherstrip unless the floor is levelled.
- Internal Clearances: Check headroom from the underside of the lintel to the lowest point of the garage ceiling, and check side room from the opening edge to the nearest side wall or pier obstruction.
Choosing the Correct Size for Your Opening
Option A: Installing Between the Brickwork Opening
If you are fixing the door between the reveal walls, the complete outer frame sits inside the opening:
- Select an overall steel frame size that is approximately 10mm to 15mm narrower than your smallest brickwork width, and 5mm to 10mm lower than your smallest brickwork height.
- This clearance allows the frame to be packed square and plumb regardless of uneven brickwork, leaving a neat perimeter gap for exterior mastic sealant.
Option B: Installing Behind the Brickwork Opening (Face Fitted)
If you have adequate internal headroom and pier returns, fitting behind the reveal maximises your usable drive through width and height:
- Select a door size where the internal frame opening is equal to or slightly larger than the brickwork opening width and height, allowing the steel frame to sit neatly behind the piers.
- Ensure you have sufficient flat wall return inside the garage to accommodate the frame legs (minimum 65mm to 75mm each side) and lintel face (minimum 65mm).
Option C: Fitting to an Existing Sound Timber Frame
If you are retaining or building a structural timber frame (minimum 70mm x 70mm recommended):
- Order the door Without Steel Frame.
- The clear internal daylight opening width and height of your timber frame must match the nominal ordering size exactly.
Canopy Gear Single Door Sizes
Canopy gear features 55mm steel frame legs and a 58mm head frame (overall frame is ordering width plus 110mm, ordering height plus 58mm). Suitable for openings up to 8ft wide by 7ft high.
| Nominal Order Size | Internal Frame Size (mm) | Overall Steel Frame Size (mm) | Clear Drive Through Size (mm) |
|---|---|---|---|
| 7ft 0in x 6ft 6in | 2134 x 1981 | 2244 x 2039 | 2094 x 1851 |
| 7ft 0in x 7ft 0in | 2134 x 2136 | 2244 x 2194 | 2094 x 2006 |
| 7ft 5in x 6ft 6in | 2259 x 1981 | 2369 x 2039 | 2219 x 1851 |
| 7ft 5in x 7ft 0in | 2259 x 2136 | 2369 x 2194 | 2219 x 2006 |
| 7ft 6in x 6ft 6in | 2284 x 1981 | 2394 x 2039 | 2244 x 1851 |
| 7ft 6in x 7ft 0in | 2284 x 2136 | 2394 x 2194 | 2244 x 2006 |
| 8ft 0in x 6ft 6in | 2439 x 1981 | 2549 x 2039 | 2399 x 1851 |
| 8ft 0in x 7ft 0in | 2439 x 2136 | 2549 x 2194 | 2399 x 2006 |
Retractable Gear Single Door Sizes
Retractable gear features 70mm steel frame legs and a 58mm head frame (overall frame is ordering width plus 140mm, ordering height plus 58mm). Standard on single doors over 8ft wide and available across all single sizes.
| Nominal Order Size | Internal Frame Size (mm) | Overall Steel Frame Size (mm) | Clear Drive Through Size (mm) |
|---|---|---|---|
| 7ft 0in x 6ft 6in | 2134 x 1981 | 2274 x 2039 | 2029 x 1871 |
| 7ft 0in x 7ft 0in | 2134 x 2136 | 2274 x 2194 | 2029 x 2026 |
| 7ft 0in x 7ft 6in | 2134 x 2286 | 2274 x 2344 | 2029 x 2176 |
| 7ft 5in x 6ft 6in | 2259 x 1981 | 2399 x 2039 | 2154 x 1871 |
| 7ft 5in x 7ft 0in | 2259 x 2136 | 2399 x 2194 | 2154 x 2026 |
| 7ft 6in x 6ft 6in | 2284 x 1981 | 2424 x 2039 | 2179 x 1871 |
| 7ft 6in x 7ft 0in | 2284 x 2136 | 2424 x 2194 | 2179 x 2026 |
| 7ft 6in x 7ft 6in | 2284 x 2286 | 2424 x 2344 | 2179 x 2176 |
| 8ft 0in x 6ft 6in | 2439 x 1981 | 2579 x 2039 | 2334 x 1871 |
| 8ft 0in x 7ft 0in | 2439 x 2136 | 2579 x 2194 | 2334 x 2026 |
| 8ft 0in x 7ft 6in | 2439 x 2286 | 2579 x 2344 | 2334 x 2176 |
| 9ft 0in x 6ft 6in | 2744 x 1981 | 2884 x 2039 | 2639 x 1871 |
| 9ft 0in x 7ft 0in | 2744 x 2136 | 2884 x 2194 | 2639 x 2026 |
| 9ft 0in x 7ft 6in | 2744 x 2286 | 2884 x 2344 | 2639 x 2176 |
| 10ft 0in x 6ft 6in | 3049 x 1981 | 3189 x 2039 | 2944 x 1871 |
| 10ft 0in x 7ft 0in | 3049 x 2136 | 3189 x 2194 | 2944 x 2026 |
* Note on Drive Through Figures: Stated drive through clearances apply to manually operated doors. Fitting an electric operator boom arm or towing bracket can slightly alter the final drive through headroom depending on the operator head position.
Internal Space and Obstruction Checks
Before confirming your order, make sure your garage interior has adequate clear space to house the door mechanism when open:
- Canopy Operating Gear: Requires a minimum 55mm internal headroom above the top of the frame, and a clear horizontal internal depth of at least 1240mm into the garage at ceiling level for the top edge of the panel to travel through.
- Retractable Operating Gear: Requires a minimum 70mm internal headroom above the top of the frame for the horizontal tracks and rear suspension brackets. The tracks extend back horizontally into the garage by the nominal internal opening height less 50mm. Ensure there are no gas pipes, light fittings, consumer units, or rafter ties fouling this track path.
- Retractable Plus Option: Recommended on single openings up to 7ft 6in wide where you need extra clearance at car wing mirror level. The lifting arms and bottom spring brackets are positioned higher up the frame legs to widen the narrowest part of the drive through.
* If your garage opening does not match standard catalogue sizes, purpose made sizes can be produced to order across most Garador timber styles. Contact our technical sales desk with your opening dimensions for guidance.
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