- Description
- Specification
- Warranty
- Measure
FREE 3-POINT LOCKING UPGRADE
For Free 3-point locking select your door size below, then choose your free upgrades from the drop-down option. Offer ends 31/03/2026
The Fort Horizontal Medium Rib door introduces refined, slimmer horizontal ribs that run across each leaf to create a subtle linear pattern with a more restrained profile than the bold wide rib model. These narrower horizontal bands are spaced closer together, generating a gentle, repeating rhythm that adds understated interest to the door face without overwhelming the overall appearance. This softer horizontal detailing suits homeowners seeking a modern, contemporary look that remains slightly more reserved and less visually dominant than stronger horizontal profiles. The refined shadow lines cast by the medium ribs shift gently throughout the day, creating a sense of movement and depth on the door surface.
This design approach pairs particularly well with properties that feature horizontal window arrangements, horizontal-format timber or composite cladding, or horizontal brick soldier courses, helping to tie the garage door into a cohesive, unified design theme across the entire elevation. The more delicate rib profile still provides improved rigidity and strength to the insulated door panels, maintaining excellent operational performance while offering a slightly softer aesthetic than bolder alternatives.
Fort 20 mm Insulated Side Hinged Range
Fort's 20 mm double-skinned steel side hinged doors combine a rigid outer skin with an insulated core to deliver improved thermal performance, strength and a quality closing action. The doors are supplied as complete pre-assembled units with steel frame and hardware, helping to ensure accurate installation, smooth operation and long-term reliability.
Construction & Insulation
The door leaves use a double-skinned steel construction with approximately 20 mm of insulation, creating a stable panel that feels solid in everyday use. This insulated build helps reduce heat loss compared to single-skin doors, supporting more comfortable temperatures if the garage is used as a workshop, gym or utility space.
Frames, Seals and Weather Protection
Each door set is supplied with a matching steel sub frame, allowing the door and frame to work together as a single engineered unit. Circumferential seals around the leaves and frame edges help minimise draughts, wind-blown debris and rain ingress, which is particularly valuable on exposed UK driveways.
Hardware, Locking and Operation
Fort side hinged doors use robust hinges and proven locking hardware designed for frequent pedestrian access rather than occasional vehicle use. The easy swing-open action makes it simple to step in and out of the garage without operating a full lifting mechanism, ideal when the garage is used daily for storage, hobbies or home business activities.
Key Features:
• 20 mm insulated double-skinned steel construction
• Refined horizontal medium rib design
• Subtle, repeating rhythm adds understated interest
• Complete pre-assembled unit with steel frame
• Circumferential weather seals for UK climate
• Pairs well with horizontal architectural details
• Single-leaf pedestrian access for daily convenience
• Modern yet restrained contemporary styling
3 Point Locking
For an added level of security, 3 point locking with twin hood locks, is available as an option.
Minimum height over-frame 2000mm.
Hinges
All hinges come colour matched and are adjustable in 3 directions for ease of alignment of the leaves.

Seals
Double seals to the door leaf and frame help protect against the weather and limit dust and debris entering your garage
Colour Options
Available in a choice of 28 colour options, the paint finish is a highly durable powdercoat ripple texture giving an attractive finish and excellent resilience.

Signal White RAL9003
Grey White RAL9002
Pebble Grey RAL7032
Dusty Grey RAL7037
Traffic Grey RAL7042
Light Grey RAL7035
Window Grey RAL7040
Silver Grey RAL7001
Iron Grey RAL7011
Slate Grey RAL7015
Graphite Grey RAL7024
Anthracite Grey RAL7016
Black Grey RAL7021
Jet Black RAL9005
Steel Blue RAL5011
Cobalt Blue RAL5013
Gentian Blue RAL5010
Signal Blue RAL5005
Light Blue RAL5012
Moss Green RAL6005
Chartwell Green BS14 C35
Ruby Red RAL3003
Traffic Red RAL3020
Chocolate Brown RAL8017
Clay Brown RAL8003
Mahogany Brown RAL8016
Light Ivory RAL1015
Cream RAL9001
Handle Options
Doors come with a chrome handle as standard and are also available with Brass, Black, White, Aluminium or Brushed Stainless Steel finish options.
2-year Product guarantee
The standard guarantee of 2 years is given to the holder of the product that covers all parts and the panel providing the serial number is readable, intact and in place. Factory applied paint finishes are 2 years on steel doors that have standard colours applied.
The product is given a 2 year warranty for hinges and locking for normal use whereby normal use consists of no more than 5 operations (open/close) per day. We recommend the product is inspected and serviced annually by a competent engineer from the garage door industry, the warranty for parts replaced by an engineer or for supply only is 6 months or for the remainder of the warranty period. If warranty work is carried out the product guarantee does not extend past the anniversary of installation/ supply date.

