Samson Defender Extreme 1 SR2 | Steel | Samson

Alternatives to this product

Samson Defender Extreme 2 SR2

Samson Defender Extreme 1 SR3

Samson Defender Extreme 1 SR2

Security Rated Steel Doorsets

LPS1175 SR2 Security Door - Single Leaf

Material: Steel
Gear Type: Hinged Doors

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Web Price: £1,580.00

(Excluding VAT and £1,896.00 Inc. VAT)

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Web Price: £1,580.00

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Description
Application
Specification
Installation
Warranty
Measure

Description

SR2 Security Rating & Defender Extreme-1 Features

The Samson Defender Extreme-1 is a single leaf security steel doorset offering B3 (SR2) certified security rating. Independently tested and certified by BRE to LPS1175: Issue 8 requirements, it delivers robust protection against sophisticated break-in attempts—meeting a key benchmark for UK high security external doors.

SR2 Rating: What Does it Mean?

SR2 is the industry shorthand for LPS 1175 Security Rating 2 (B3), part of the Loss Prevention Certification Board (LPCB) standards. An SR2 steel doorset must withstand a sustained attack using a range of hand tools for a confirmed minimum time (often 3 minutes). This independent third-party certification is crucial for commercial, public and high-risk facilities that demand proven physical protection against criminals using burglary tools such as bolt cutters, heavy-duty screwdrivers, claw hammers, and pliers.

Many UK insurers, architects and contractors require SR2-rated doors as a minimum for external security points, access control barriers, and sensitive areas in offices, retail, warehousing, healthcare, education, utilities and public sector buildings.

Door Features & Options

Made to measure, double skinned steel leaf
Inward or outward opening options
Manufactured entirely in the UK by Metador
Certified to LPS1175 Issue 8: SR2/B3 (also available in SR3/C5 and SR4/D10 ratings)
Maximum single leaf width: 1460mm | Max height: 2500mm (3440mm with top transom)
Steel fixing sub-frame always factory fitted, complete with selected hardware and locking
Extensive range of locks, latches, handles, panic hardware, closers and stays, all approved to the required LPS 1175 security standard
Powder coated finish – any RAL colour, with 250 key standard options for rapid delivery; marine grade finishes available for coastal sites
External use is standard, but also suitable for internal applications
Optional thresholds available for various site requirements
SR2 format options: louvered panel inserts for ventilation, fire rated up to 120 minutes
Solid, glazed, or louvered side and over panels available, rated within LPS1175 B3 as required

Why is Steel & SR2 So Important?

Steel’s inherent strength and resilience make it superior to timber or composites for resisting forced entry—a key factor in meeting UK security, insurance, and life safety requirements.
LPS1175 SR2 doors are recognised throughout the UK as a foundation for meaningful security in vulnerable or high-value premises, often specified by government, police and insurance bodies.
LPCB certification guarantees the product has passed exhaustive bench and physical testing, giving peace of mind and often enabling lower insurance premiums.
Modern steel doors also offer advanced finish and fire safety options for both practicality and aesthetics.

Choose Defender Extreme-1 for proven, UK-certified steel security you can trust—tailored to your specification and built for lasting protection.

Application

SR2 security-rated steel doors provide robust protection and peace of mind across a wide range of building types and security-critical environments. These high-integrity doors are specified not only for superior burglary resistance but for their exceptional manufacturing quality, advanced locking systems, and market-leading durability—factors that significantly extend lifetime value when compared to lower-specification products.

Where Are SR2 Doors Typically Used?

Commercial properties – offices, retail shops, showrooms, banking premises, and data centres where secure access points are essential to protect staff, assets, and sensitive information.
Industrial facilities – warehouses, factories, logistics hubs, utilities, and energy providers, where external entry points are vulnerable and need verified attack resistance.
Residential developments – individual homes, apartment blocks, and gated communities seeking enhanced entry protection, especially for plant rooms, bike stores, or storage buildings.
Public sector buildings – schools, universities, healthcare facilities, and community centres, where safeguarding public, staff, and high-value equipment is a priority.
Critical infrastructure – government buildings, water treatment plants, telecom sites, substations, and service yards, where failure of physical security can have wide-reaching consequences.
Pharmaceutical & storage – buildings storing high-value, hazardous, or regulated goods that must meet strict insurance or statutory security standards.
Leisure & sports venues; hospitality – stadiums, gyms, hotels, and entertainment complexes requiring robust barrier protection at staff, back-of-house, and plant areas.

Why Choose SR2 Security Doors?

Peace of mind security – for premises where interruption, theft, or unauthorised access would have significant operational or personal consequences.
Trusted by insurers and specifiers – often required by insurance policies or government security frameworks for external access points.
Greater longevity – superior build quality and high-grade components deliver long-term resistance to both attack and daily wear, making SR2 doors a cost-effective investment.
Flexible application – available in bespoke sizes, finishes, and hardware configurations to match each site’s operational, aesthetic, and compliance needs.

Whether protecting valuable assets, confidential data, public infrastructure or private homes, an SR2 steel door delivers certified security, reliability, and substantial peace of mind in the UK’s most demanding environments.

Specification

Defender Extreme-1 SR2 Steel Doorset – Specification

Dimensions

Maximum width (including fixing sub frame): 1460mm
Maximum height (including fixing sub frame): 2500mm

Security Rating & Certification

B3 (SR2) Security Rated – Independently certified by LPCB to LPS1175: Issue 8 (Ref no. 1284c/01) for robust protection against advanced forced entry attempts.
SR2/B3 security doors are recognised throughout the UK market as providing credible protection for vulnerable external and internal access points.

Door Leaf & Threshold

Construction: Galvanised steel double-skin with panel thickness and infill tailored to door size and required security level
Anti-jemmy flange: Fitted to leading edge, resists prying and lever attacks
Threshold: Standard DDA-compliant chamfered profile in 2mm stainless steel, with optional raised/extended cills, inward opening drainage profiles, 4mm ramped threshold, or integrated removable threshold for site-specific requirements

Sub Frame

Material: Galvanised steel with bolted corners for strength
Integrated weather seals: Silicone rubber seals bonded in for exceptional thermal and acoustic performance plus weather resistance
Frame design supports rapid, secure installation

Hardware Options (LPS1175 Approved)

Multipoint locking – Sashlock with lever/lever handles, or nightlatch systems
Thumbturn operation for ease of emergency exit
Push/pull hardware: Mico Modula PE6 full width stainless steel push bar (single leaf) or Mico MSR-1/2 PE6 panic hardware (double leaf)
Door closers, stays, and furniture: All options approved to SR2 rating for consistency and compliance

Over Panels, Side Panels & Vision Panels

Wide range of solid, glazed, or louvered steel side/over panels compatible and compliant within LPS1175 rating; enables flexible installation for larger or multi-access sites
Vision panels available in multiple size/design options for safe visibility and additional light

Finish & Corrosion Resistance

Powder coated to any RAL colour; over 250 rapid-turnaround options available
Marine grade finishes available for coastal or chemically exposed sites
All major components constructed from galvanised steel for maximum corrosion resistance and long-term durability

Additional Features & Compliance

Accessibility: DDA (Disability Discrimination Act) compliant threshold options as standard
External or internal use: Designed primarily as an external doorset but suitable for select high-security internal applications when threshold suitability is confirmed
Manufactured entirely in the UK for stringent quality and traceability

Defender Extreme-1 SR2-rated doors are engineered for sectors that require verifiable security alongside excellent weather, thermal and acoustic performance – ideal for offices, commercial, public sector, critical infrastructure and high-value storage locations.

Installation

Installation Guide: DIY vs. Professional

The Metador Defender Doorset is designed with the installer in mind, featuring a unique "Fast-Fit" adjustable frame system. However, due to its heavy-duty construction, it is physically demanding to handle.

1. Handling & Weight (Critical Warning)

Do not underestimate the weight of this door.

Weight: A single Level 2 or Level 3 steel door can weigh in excess of 80kg - 120kg depending on size and core specification.
Manpower: We strongly recommend a minimum of 2 strong people for offloading and positioning. For larger or solid-core doors, 3 people or mechanical lifting aids (genie lift/glass lifter) are advised.
Delivery State:
- Single Doors: Typically delivered fully assembled (door leaf pre-hung in the frame). You may need to separate the leaf from the frame to reduce weight for positioning.
- Double Doors: Often delivered with the frame and leaves separate to make handling manageable.

2. The "Fast-Fit" Adjustable Frame

The Extreme features a clever frame design that removes the need for fiddly packers or shims.

Adjusters: The frame is fitted with roughly 16 threaded hexagonal adjusters (depending on size).
Method:
1. Place the frame in the opening.
2. Use a cordless drill with a hex bit to wind out the adjusters until they grip the wall.
3. This temporarily "clamps" the frame in place, allowing you to fine-tune the level and plumb without holding the full weight.
4. Once perfectly level, you drill through the centre of the adjusters into the masonry/steelwork and bolt it home.

3. Tools Required

SDS Drill (for masonry fixing holes).
Impact Driver (for driving concrete bolts).
Long Spirit Level (1800mm+) – Essential for checking the hinge jamb is 100% vertical.
12mm / 14mm Hex Bit (for frame adjusters).
Crowbar / Air Wedge (for final lifting/positioning).

4. Should I Install It Myself?

DIY / Builder

Pros: Save on labour costs.

Cons: Handling the weight can be dangerous without experience. If the frame is not fitted 100% square (even 2mm out), the heavy door will not latch correctly or may swing open/closed on its own.

Professional Door Installer

Pros: They will have the lifting gear and experience to handle the weight safely. They understand how to "toe-and-heel" glaze and adjust heavy-duty hinges for perfect operation.

Cons: Higher initial cost.

Recommendation: If you are an experienced builder with a helper, the "Fast-Fit" system makes this a straightforward job. If you are a DIY novice, we strongly advise hiring a professional purely due to the health and safety risks of handling heavy steel doors.

Warranty

Metador/Samson Product Guarantee & Warranty

Guarantee Periods

Frame and doorset: 15-year guarantee (with correct installation and maintenance)
Ironmongery: 1-year guarantee (with correct usage and maintenance)
Marine Grade PPC finish: 10-year guarantee (with cleaning and maintenance programme)
Standard powdercoat finish: 1-year guarantee (with cleaning and maintenance programme)

What’s Covered?

Repair or, at our discretion, replacement of any goods shown to be defective within the stated warranty periods from date of purchase
If a product is supplied with a defective internal component, only that component will be replaced
A “defective” good is one that fails to function properly under correct usage due to a fault in materials, workmanship, or design
Goods defective on delivery will be replaced when reported within 3 working days of receipt — photographic evidence required showing the goods as delivered on their pallet

Guarantee Exclusions

Any damage caused by abuse, neglect, unsuitable/lack of maintenance, or incorrect installation
Use of harmful cleaning solvents on the door
Scratches, washing, paint protection, or any damage to the paint finish
Parts not advised or supplied by Metador
External impacts including weather
Fitting or repairs by persons not authorised by Metador
Fair wear and tear

Important: To validate any guarantee or warranty, customers must maintain a documented cleaning and maintenance regime indicating frequency, methods, and products used. This record must be submitted for any claims to be considered.

Claims Procedure

Contact Samson Doors or Metador in writing within 3 working days of discovering a defect, specifying the nature of the claim
On request, return the defective product to Metador Ltd at your cost for inspection

Measure

How to Measure for Your Metador Defender Doorset

Getting the measurements right is critical. Steel doorsets are precision-engineered products and cannot be trimmed or planed on site like timber doors. Please follow this guide to determine the correct ORDERING SIZE.

1. Measure the Structural Opening

Measure the raw aperture (brick-to-brick or steel-to-steel) where the door will be installed.

Width: Measure at the Top, Middle, and Bottom of the opening.
Record the smallest dimension.
Height: Measure at the Left, Centre, and Right from the lintel to the finished floor level.
Record the smallest dimension.
Diagonals: Measure corner-to-corner to check if the opening is square. If there is a significant difference (more than 5-10mm), you may need to allow extra tolerance.

2. Calculate Your Ordering Size

CRITICAL RULE: You must deduct a fitting tolerance from your structural opening size. We manufacture to the exact size you order—we do not make deductions for you.

We recommend the following tolerances for the Metador Defender frame:

Width: Deduct 10mm from your smallest structural width (5mm clearance per side).
Height: Deduct 10mm from your smallest structural height (5mm at the top, 5mm at the bottom).

Calculation Example:

Smallest Structural Opening: 1000mm (W) x 2100mm (H)
Minus Tolerance: -10mm (Width) | -10mm (Height)
ORDER SIZE: 990mm x 2090mm

3. The "Fast-Fit" Frame System

The Metador Defender Xtraguard is supplied with a high-tensile steel frame featuring adjustable fixing points.

Adjustment: The frame is fitted with threaded adjusters (dog-bolts) that wind out to bridge the 5mm gap you have allowed.
Why the tolerance matters: This 5mm gap allows you to slide the frame into the opening easily and shim/adjust it until it is perfectly square and plumb, even if your brickwork is slightly uneven.

Important Reminders

Thresholds: The "Overall Order Height" includes the threshold. If you are installing on top of a finished floor, measure from that floor level. If you are recessing the threshold, measure from the sub-floor.
Opening Direction: Check if there are any obstructions (rainwater pipes, walls, uneven ground) that might stop the door opening fully to 180 degrees if required.
Metric Only: Always measure and order in Millimetres (mm).

Once your order is placed, we will produce a CAD drawing for you to sign off before manufacture begins. This is your final safety net to check the sizes.

Please refer to the diagram below for a visual guide on where to take your measurements.