Flood Defender Doors
M3 Floodtec supplies specialist flood doors for homes, businesses, heritage buildings, utilities and other properties at risk of flooding. Our range includes UPVC, Composite, Timber and Steel Flood & Security Doors, with options for single and double openings, low thresholds and escape hatches across selected ranges.
How Do Flood Doors Work?
A flood door looks and operates like a normal door, but specialist seals, locking systems and structural components are built into the door and frame to help resist floodwater.
Flood doors are a passive form of Property Flood Resilience (PFR). This means they do not need to be deployed like a removable flood barrier. When flooding is expected, the door simply needs to be closed and correctly locked for its flood-resistant features to work.
Composite Flood Doors
Flood Defender Composite Doors combine built-in flood resistance with the strength, thermal performance and security expected from a modern entrance door. Their robust construction makes them suitable for homes and other properties where everyday performance is just as important as preparing for future flooding.
Strength & Thermal Performance
Composite doors use a high-strength, double-rebate construction designed to provide a secure seal and strong thermal performance. They also achieve an A-rated energy efficiency rating, helping provide a comfortable and efficient entrance throughout everyday use.
Styles, Colours & Glazing
Flood resilience does not mean compromising on appearance. Composite Flood Defender Doors are available in a range of styles and colours, with a variety of glazing options, side panels, top lights and door furniture available to complement different properties.
uPVC Doors
Flood Defender UPVC Doors provide built-in flood resistance while looking and operating like a standard UPVC door during everyday use. They are a versatile option for residential and commercial properties and can be manufactured to suit different entrance sizes and access requirements.
Flexible Door Options
Doors are available in a range of sizes, styles and colours, with glazing options, UPVC panels, side panels and top lights available. Single and double-door options provide flexibility for both standard and wider entrances.
Access & Escape Options
The UPVC range also offers options where accessibility or additional access needs to be considered. Low Threshold Flood Defender Doors provide easier access for wheelchair users and people with reduced mobility, while selected doors can incorporate an escape hatch for an additional means of access or escape during flooding.
Timber Flood Doors
Our Timber Flood Defender Doors are manufactured from Accoya® Timber, a highly durable modified timber known for its stability and resistance to moisture. They combine modern flood resilience with the natural character and design flexibility of timber.
Suitable For Heritage Properties
Timber is particularly useful where the appearance and character of an existing building need to be retained. Doors can be manufactured in bespoke sizes and styles, helping replicate traditional designs for period and listed properties while also providing options for contemporary buildings.
Bespoke Design & Detailing
A wide range of colours, glazing and design details can be incorporated, allowing the finished door to complement the property. Escape-hatch options are also available where additional access or escape requirements need to be considered.
Steel Flood & Security Doors
Our Steel Flood & Security Doors are designed for locations where flood risk and security need to be considered together. Manufactured in the UK, they are particularly suited to commercial, industrial, utility and remote sites where a robust security door is required during everyday conditions.
Flood Protection & Enhanced Security
Unlike the other Flood Defender Door ranges, our Steel Flood & Security Doors hold two BSI Kitemark™ certifications to PAS 1188-1:2014. Their heavy-duty construction and locking systems provide enhanced resistance to unauthorised access alongside built-in flood protection.
Built For Demanding Environments
Manufactured from 1.5mm galvanised steel with corrosion-resistant protection, the doors are designed for demanding locations and long-term use. Single and double outward-opening doors are available, with options including glazing, louvres and overhead panels.
French & Double Flood Doors
Flood resilience is also available for wider entrances, patios and double-door openings. M3 Floodtec provides French and double Flood Defender Doors in both UPVC and Timber, allowing larger openings to benefit from built-in flood resistance while retaining normal everyday access.
Flood Resistance For Wider Openings
The two doors are designed to work together when closed, with specialist sealing and locking systems helping resist floodwater across the wider opening. This provides built-in flood resistance for entrances where a conventional single door may not be suitable.
UPVC & Timber Options
UPVC provides a versatile choice for modern properties, with different glazing, panel and finish options available. Timber provides greater flexibility where bespoke detailing or the character of a traditional or heritage building needs to be considered.
Low-Threshold Flood Doors
M3 Floodtec offers Low Threshold Flood Defender Doors in UPVC and Composite for properties where easier access needs to be considered alongside flood risk. The reduced step at the entrance helps make everyday access easier while retaining built-in flood resistance.
Supporting Accessible Entrances
Low Threshold Doors can help provide easier access for wheelchair users, people with reduced mobility, and others who may find a standard threshold difficult to cross. The doors are designed to meet the relevant accessibility requirements of Part M of the Building Regulations.
Independently Tested Performance
M3 Floodtec developed the world’s first Low Threshold Flood Door to achieve BSI Kitemark™ certification. UPVC and Composite Low Threshold doors are included within our current certified range and have been independently tested to British Standard BS 851188.
Escape Hatch Flood Doors
Escape-hatch options are available on selected UPVC and Timber Flood Defender Doors where an additional means of access or escape may be required during flooding. The hatch is built into the upper part of the door and can be opened independently while the main door remains closed.
Additional Access During A Flood
The escape hatch provides an opening above the main flood-resistant section of the door. This can be useful where access or emergency escape arrangements need to be considered alongside the expected flood level.
Designed Around The Property
Escape hatches can be incorporated into both UPVC and Timber Flood Defender Doors, allowing the solution to suit different buildings and door styles. Suitability will depend on factors including the expected flood depth, property layout and access requirements, so it should be considered as part of the wider flood resilience design.
Choosing the Right Flood Door
The most suitable flood door will depend on several factors, including the expected flood depth, size of the entrance, how the door needs to open, accessibility, security and the style of the building.
M3 Floodtec offers different materials and door types so these requirements can be considered together. Following an appropriate flood risk or Property Flood Resilience assessment, our team can help identify a door that meets the needs of the property while providing independently tested flood resistance.
Independently Tested Flood Doors
M3 Floodtec was the first company in the world to achieve the BSI Kitemark™ for a flood resistance product range tested to British Standard BS 851188. Our UPVC, Composite and Timber Flood Defender Doors include products independently tested to British Standard BS 851188 and BSI Kitemark™ certified under Licence No. KM 713574.
Many of these Flood Defender Doors have a designated maximum water depth of 600mm. Put simply, they have been independently assessed with floodwater up to 600mm high. Specialist seals, locking systems and door construction work together to help reduce water entering through the doorway when the door is correctly closed and locked.
Case Studies
Frequently Asked Questions
How does a flood door protect against flooding?
A flood door has specialist seals, locking systems and structural components built into the door and frame to help resist floodwater. When the door is closed and correctly locked, these features work together to reduce the amount of water entering through the doorway. Because the protection is built in, a flood door does not need to be deployed like a removable flood barrier.
How much floodwater can an M3 Floodtec Flood Defender Door resist?
Are M3 Floodtec Flood Defender Doors BSI Kitemark™ certified?
Do flood doors look like normal doors?
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