Hörmann D65 OD: The Ultimate All-Rounder
Engineered for performance without compromise, the D65 OD is the go-to steel doorset for secure, energy-efficient UK buildings.
- High Security: Certified break-in resistance up to RC4.
- Superior Insulation: 65mm thick leaf offering U-values as low as 1.5 W/(m²K).
- Acoustic Control: Blocks noise with sound insulation up to 43 dB.
- Premium Aesthetics: Flush, fully welded "OD" surface for a clean, modern finish.
- Made to Measure: Custom single and double sizes to fit any opening.
- Description
- Application
- Specification
- Installation
- Warranty
- Measure
Hörmann D65 OD: Multi-Function Steel Doorset
The Hörmann D65 OD is the definitive "all-rounder" for the UK commercial and industrial market. Designed as a high-performance multi-function doorset, it serves equally well as a robust external security door, a thermally efficient entrance, or a high-decibel acoustic barrier.
While visually identical to the fire-rated H3 OD series, the D65 OD is specified where fire resistance is not required, allowing for higher thermal and security performance levels at a competitive price point.
Construction & Design
True to its name, the D65 OD features a 65mm thick door leaf, offering superior stability compared to standard 45mm or 50mm steel doors.
- Leaf: Double-skinned 1.5mm galvanised steel sheet (standard), fully bonded with a mineral wool or PU core for structural rigidity.
- Design: The "OD" (Object Door) series features a flush, fully welded leaf design that eliminates visible leaf edges (thick rebate) for a cleaner, premium aesthetic.
- Frame: Supplied with the "Universal Corner Frame" as standard for rapid diagonal fixing, or optional block frames for installation in the reveal, which is far more common in the UK market and our construction techniques.
Dimensions & Configurations
The D65 OD is available in flexible sizing to suit everything from standard personnel access to large equipment removal routes.
Single Leaf (D65-1 OD)
- Width: 625mm – 1250mm (Standard) | Up to 1500mm (Oversized)
- Height: 1750mm – 2500mm (Standard) | Up to 3500mm (Extended Height)
Double Leaf (D65-2 OD)
- Width: 1375mm – 2500mm (Standard) | Up to 3000mm (Oversized)
- Height: 1750mm – 2500mm (Standard) | Up to 3500mm (Extended Height)
- Asymmetric Split: The active traffic leaf can be ordered in a custom width (e.g., 1000mm active / 500mm inactive) to maximise clear opening width for daily use.
Note: Total height including transom panels can extend beyond 3500mm for tall architectural openings.
Performance Specifications
The D65 OD excels in external applications where environmental control and building security are critical.
| Performance Metric | Rating |
|---|---|
| Thermal Insulation | UD = 1.5 W/(m²K) (approx) (Exceeds standard building regulation requirements for industrial doors) |
| Acoustic Insulation | Up to 43 dB (Rw) (Ideal for plant rooms, data centres, and offices near busy roads) |
| Security | RC2, RC3, & RC4 (Certified break-in resistance according to EN 1627) |
| Wind Load | Class C5 / B5 |
| Watertightness | Class 4A (under heavy rain conditions) |
Equipment & Customisation
The D65 OD is a "blank canvas" that can be configured for specific operational needs:
- Glazing: Multiple rectangular, square, or round glazing options (triple-pane safety glass) to match thermal and security requirements.
- Ventilation: Integrated steel ventilation grilles (note: this may affect acoustic/thermal ratings).
- Finishes: Available in Traffic White (RAL 9016) as standard, or any RAL colour. Also available in Decograin wood finishes (Golden Oak, Dark Oak, Winchester Oak) for a premium timber look with steel durability.
- Hardware: Single-point locking (standard) or 3-point / 5-point locking for enhanced security. Panic bars (EN 1125) and push pads (EN 179) available for emergency exit routes.
Typical Applications
- External Security: Rear exits for retail, warehouses, and offices.
- Data Centres: High security (RC3/RC4) combined with cooling efficiency (U-value 1.5).
- Plant Rooms: Acoustic control to prevent machinery noise leaking to external areas.
- Residential/Flats: Secure communal entrances or bicycle stores.
The Hörmann D65 OD is designed for UK commercial buildings that need a durable external steel doorset with strong insulation, high acoustic performance and certified security options. It is widely specified as a multi-function door where the requirement is to combine day-to-day reliability with enhanced protection against forced attack and harsh weather exposure. [web:284][web:285]
Warehousing, Logistics & Industrial
For busy operational sites, the D65 OD is ideal where a standard personnel door would be quickly damaged or become draughty over time. It is commonly used for:
- Staff entrances on warehouses and distribution centres where thermal efficiency helps reduce heating losses. [web:284]
- Goods-in / service access doors where oversized single or double leaf configurations provide practical clearance. [web:284]
- Plant and maintenance access where acoustic options reduce noise breakout from machinery rooms. [web:284]
Retail, Supermarkets & Back-of-House
Retail sites need secure doors that remain easy to operate for staff and deliveries. The D65 OD is frequently specified for:
- Rear exits and delivery doors where higher security ratings (RC2–RC4) are required to deter break-ins. [web:284]
- Service corridors and stockroom access points where robust steel construction reduces damage and maintenance. [web:284]
- Refuse / plant areas where weather resistance and dependable sealing are important year-round. [web:284]
Data Centres & Critical Infrastructure
Data centres and critical infrastructure environments often need strong physical security without compromising environmental control. The D65 OD suits:
- External access points where RC-rated security can be specified to reduce vulnerability to forced entry. [web:284]
- Cooling-efficiency driven locations where thermal performance supports more stable internal conditions. [web:284]
- Noise-sensitive developments where acoustic configurations help manage plant noise and protect neighbouring areas. [web:284]
Offices, Commercial Estates & Mixed-Use Sites
For multi-tenant and managed commercial premises, the D65 OD is suited to external doors that must stay aligned, sealed and secure with frequent daily use. Typical uses include:
- Rear staff doors and side access doors where appearance can be kept consistent with RAL colour finishes. [web:284]
- Stair cores and perimeter doors where a robust doorset reduces callouts caused by warping or impact damage. [web:284]
- Secure stores and comms rooms where higher security configurations provide added protection for assets. [web:284]
Communal Entrances (Commercial-Led Residential Blocks)
On mixed-use schemes and apartment developments, the D65 OD can be used for entrances, bin stores or cycle stores where enhanced security and weather performance are needed. However, communal doors often require fire performance and self-closing behaviour depending on the building design and compliance route, so the correct fire-rated alternative should be specified where required. [web:284][web:311]
Configuration Examples for Real Projects
- High-security rear exit: D65 OD single leaf with RC3/RC4 upgrade and reinforced locking specification. [web:284][web:298]
- Wide operational access: D65 OD double leaf with an asymmetric split (wider active leaf for daily traffic). [web:284]
- Plant-room control: Acoustic-rated configuration (up to 43 dB) to reduce noise transmission. [web:284]
- Daylight + safety: Vision panel glazing options to improve visibility in service corridors and fire escape routes (where permitted by the project spec). [web:284]
Technical Specifications: Hörmann D65 OD
Construction
| Door Leaf Type | Double-skinned steel, fully welded "OD" (Object Door) flush design |
| Leaf Thickness | 65mm (external dimension) |
| Steel Sheet Thickness | 1.5mm galvanised steel (standard) |
| Core Material | Mineral wool or PU rigid foam (performance dependent) |
| Rebate Type | Thick rebate (flush external appearance) |
| Frame Material | 2.0mm galvanised steel with moulded sealing groove |
| Frame Type (Standard) | Universal corner frame with diagonal fixing |
| Frame Finishes | Powder-coated primer in grey white (similar to RAL 9002) |
Dimensions
| Configuration | Width Range (mm) | Height Range (mm) |
|---|---|---|
| D65-1 OD (Single Leaf) | 625 – 1500 | 1750 – 2500 (up to 3500 with transom) |
| D65-2 OD (Double Leaf) | 1375 – 3000 | 1750 – 2500 (up to 3500 with transom) |
| Asymmetric Double Leaf | Variable active/passive split available | As above |
Note: All dimensions are nominal ordering sizes. Consult factory for oversized or bespoke requirements.
Performance
| Thermal Insulation (UD) | From 1.5 W/(m²·K) (depending on core specification) |
| Acoustic Insulation (Rw) | Up to 43 dB (with threshold rail and seal) |
| Security Rating | RC2, RC3, RC4 (EN 1627) – burglar resistance certified |
| Wind Load Classification | Class C5 / B5 (EN 12210 / EN 12211) |
| Watertightness | Class 4A (EN 12208) |
| Duty Category | Class 7 (high-frequency use) |
| Product Standard | EN 14351 (CE marked) |
Hardware & Fittings
| Hinges (Standard) | 3-part ball-bearing hinges, galvanised (Maintenance-friendly with replaceable rolling bearings) |
| Hinges (Optional) | 3D adjustable hinges (height, side, and compression adjustment) Spring hinge option available |
| Lock (Standard) | DIN mortice lock with deadbolt, prepared for profile cylinder Backset: 55mm | DIN 18251 compliant |
| Lock (Security) | Single-point (RC2/RC3) or multi-point locking (3-point or 5-point) for RC3/RC4 Reinforced bolt for break-in resistance |
| Panic Hardware | EN 1125 panic bars or EN 179 emergency exit devices available |
| Handle Set | FS aluminium lever handle set (EN 1906 / DIN 18257 Class ES1/ES2/ES3) Stainless steel option available |
| Door Closer | Overhead door closer (size-dependent) – concealed or surface-mounted |
| Seals | EPDM rubber seals (3-sided frame seal as standard) Optional retractable bottom seal or threshold rail with brush seal |
| Threshold | 30mm floor recess (can be shortened on site) Optional low-level or flush threshold for accessibility |
Glazing & Ventilation
| Glazing Options | Rectangular, square, or round vision panels Double or triple-pane safety glass (EN 356 options available) |
| Glazing Compatibility | Standard, acoustic-rated, or security-rated glass infills |
| Ventilation Grilles | Integrated steel louvre grilles (may affect thermal/acoustic ratings) |
Finishes & Colours
| Standard Finish | Traffic White, RAL 9016 (powder-coated) |
| RAL Colours | Any RAL Classic colour available |
| Decograin Films | Golden Oak, Dark Oak, Winchester Oak (wood-effect laminate) |
| Surface Treatment | Galvanised steel + primer + topcoat (two-layer system) |
Standards & Certification
| Product Standard | EN 14351 (External pedestrian doorsets) |
| Security Testing | EN 1627 (Burglar resistance RC2 – RC4) |
| Acoustic Testing | EN ISO 717-1 (Sound insulation) |
| CE Marking | Yes (supplied with Declaration of Performance) |
The doorset is delivered factory assembled in most specifications for the easiest on site installation.
Warranty (Supplier & Manufacturer)
Your Hörmann D65 / D65 OD steel doorset is supplied by Samson Doors and manufactured by Hörmann.
Warranty support is provided through Samson Doors as the point of contact, with the product warranty underwritten by the manufacturer (Hörmann) subject to the applicable warranty terms supplied with your order documentation.
What’s Covered
- Manufacturing defects in the doorset components supplied by Hörmann (e.g., door leaf, frame and factory-fitted elements), where the product has been installed and used correctly.
- Factory-finished surfaces, where a defect is attributable to manufacture rather than site damage or exposure outside the intended environment.
- Specified performance hardware supplied as part of the doorset build (locks, hinges, seals), subject to normal maintenance and correct adjustment.
What’s Not Covered (Typical Exclusions)
- Incorrect installation, including out-of-plumb frames, poor fixings, insufficient sealing, or incompatible substrates.
- Misuse or accidental damage, including impact damage, forced entry attempts, vandalism, or door closers being overridden.
- Fair wear and tear (e.g., cosmetic scuffs, normal seal compression, gradual hinge/closer adjustment needs).
- Site or environmental factors such as aggressive coastal/industrial atmospheres, chemical exposure, or water ingress due to building defects.
- Unauthorised modifications such as cutting the leaf/frame, drilling extra apertures, fitting non-approved third-party hardware, or altering locks without approval.
Warranty Conditions
- The doorset must be stored, handled and installed correctly and in accordance with the applicable fitting/maintenance guidance supplied with the doorset.
- Routine checks should be carried out (alignment, hinge/closer adjustment, latch engagement, seal condition), particularly on high-traffic doors.
- Where the door is specified for enhanced security/acoustic/thermal performance, the correct threshold/sealing configuration must be installed and maintained to preserve performance.
How to Make a Warranty Claim
- Contact Samson Doors with your order reference, delivery address, and installation date.
- Provide clear photos/videos of:
- The issue (close-up and wider context).
- The hinge side, lock side, and threshold area.
- Any product identification labels (where available).
- Describe the fault and site conditions (internal/external, exposure, frequency of use, closer type, access control, etc.).
- Do not attempt permanent repairs or modifications before authorisation, as this may affect eligibility under the manufacturer’s warranty.
Remedy & Site Attendance
If the issue is confirmed as a warranty matter, the remedy is typically provided at the manufacturer’s discretion (repair, replacement component, or replacement of the affected assembly). Any associated site costs (e.g., access equipment, out-of-hours attendance, making good, or removal/reinstallation) may be chargeable unless agreed in writing as part of the warranty remedy.
Measuring Guide: Steel Doorsets
Getting the right size is critical for a successful installation. Steel doorsets are precision-engineered products and cannot be easily trimmed or adjusted on site like timber doors. Please follow these rules carefully before ordering.
1. Order Size vs. Opening Size
Crucial Rule: Steel doorsets are always ordered by their OVERALL FRAME DIMENSIONS (width x height), not the leaf size or the opening size.
The size you order is the exact external size of the door frame we will manufacture. We do not make deductions for you.
2. How to Calculate Your Order Size
To ensure the door fits into your structural opening, you must allow for a fitting tolerance (clearance gap) around the frame.
- Width: We recommend deducting 10mm from your smallest structural opening width (5mm each side).
- Height: We recommend deducting 10mm from your smallest structural opening height (5mm top and 5mm bottom/floor level).
Example Calculation:
- Measured Structural Opening: 1000mm Wide x 2100mm High
- Recommended Deduction: -10mm Width, -10mm Height
- ORDER SIZE: 990mm Wide x 2090mm High
Note: The tolerance required depends on how square and plumb your opening is. If the brickwork is very uneven, you may need to allow more tolerance to shim and level the frame correctly.
3. How to Measure Your Opening
Never assume an opening is perfectly square. Take multiple measurements to find the "tightest" point.
- Width: Measure at the Top, Middle, and Bottom of the opening. Use the smallest measurement.
- Height: Measure at the Left, Centre, and Right of the opening. Use the smallest measurement.
- Diagonals: Measure corner-to-corner (top-left to bottom-right, and top-right to bottom-left). If the diagonal measurements differ significantly, your opening is not square, and you may need to allow extra tolerance.
4. Important Checks
- Floor Levels: Check if the floor is level across the full width of the opening. If the floor is uneven, you must measure from the highest point of the finished floor level (FFL).
- Thresholds: Remember that the Overall Frame Height includes the threshold (if one is specified). Ensure you are measuring from the correct floor level.
- Internal vs External: Check the opening size from both inside and outside the building. Use the smaller set of dimensions if there are differences (e.g., render returns).
5. Units & Drawing Approval
Always measure and order in Millimetres (mm). Avoid using inches or centimetres to prevent conversion errors.
Once your order is placed, we will provide a technical drawing showing your specified dimensions. You must check and approve this drawing before manufacture begins. This is your final opportunity to catch any measuring errors.
