Lead-lined door codes describe the thickness (in millimetres of lead) used inside a doorset to shield against X-rays and radiation, helping hospitals meet radiation protection requirements for specific rooms. In practice, thicker codes provide higher protection, but they also add weight and cost, so each space must be carefully assessed.
In healthcare projects, lead-lined doorsets are a critical part of the radiation protection strategy, sitting alongside walls, screens and glazing. Codes such as Code 3, Code 4 and up to Code 8 refer to standard sheet lead thicknesses defined in BS EN 12588. For example, a typical Code 3 sheet equates to around 1.32 mm lead (Pb), while Code 8 is around 3.55 mm.
Because X‑ray energy and workload vary between departments, a one-size-fits-all approach does not work. Imaging suites, operating theatres with imaging equipment and diagnostic rooms will usually have different shielding requirements. Shielded doors must match the performance of the surrounding wall build-up; the doorway becomes the weak point in the barrier.
This is where a specialist lead-lined system, such as Shieldoor, is valuable. All Shieldoor doorsets are fully encapsulated, with integrated lead lining through the leaf and frame to prevent gaps in the protection.
To choose the right Shieldoor specification, start with the Radiation Protection Adviser (RPA) report, confirm the required lead equivalence for each wall, then match the doorset code (for example, Code 3 to Code 8 or higher) so the door never underperforms the surrounding structure.
Shieldoor can be manufactured with lead thicknesses ranging from Code 3 (around 1.32 mm Pb) to Code 8 (around 3.55 mm Pb). This flexibility allows the doorset to be aligned exactly with the RPA’s shielding calculations for each room.
In practice, lower-intensity imaging rooms might only require a Code 3 or Code 4 door, whereas CT, interventional radiology or cardiac catheter labs can require much higher lead equivalence. A Code 8 door will be significantly heavier, which means hinges, frames and ironmongery must be engineered for the increased weight of the door.
SDS designs Shieldoor as a complete system, including a universal frame that delivers continuous radiation protection regardless of the wall construction.
Lead-lined doors must do more than stop X‑rays; they also need to meet UK fire, hygiene and durability standards, backed by independent certification and aligned with formal RPA calculations for each clinical space.
BS EN 12588 sets requirements for rolled lead sheet, giving designers confidence that specified thicknesses deliver consistent performance. Using doorsets built with lead manufactured to this standard helps maintain predictable shielding, especially over large door leaves and tall openings.
Shieldoor doorsets support compliance in several ways. They carry BM TRADA Q‑Mark certification and are available in NFR, FD30* and FD60* fire ratings (*only for doors featuring lead codes 3 to 6, lead codes 7-8 are only available NFR), which helps hospital clients demonstrate due diligence under current fire safety regulations. Many NHS Trusts now expect third‑party certification as a baseline for any high‑risk doorset.
Crucially, the correct code selection always starts with an RPA. The RPA will calculate the shielding required for each room based on workload, equipment type, occupancy and layout. SDS works with RPAs and design teams to translate those calculations into practical door specifications, including glazing options with integrated lead and matching fire performance.
Maintaining clear documentation – from RPA reports through to Shieldoor datasheets and installation records – supports Building Safety Act requirements for a golden thread of information across the building lifecycle.
Modern lead-lined doors should combine reliable radiation protection with hard-wearing, easy-to-clean surfaces, flexible design options and a long lifecycle, reducing whole-life cost for hospital estates teams.
Shieldoor is a PVC post-formed doorset designed specifically for high-traffic healthcare environments. Compared with traditional timber or laminate doors, the encapsulated construction offers excellent impact resistance and minimal maintenance, which is essential in corridors where beds, trolleys and equipment frequently strike the door face.
From a design perspective, Shieldoor is available in more than 35 colours and woodgrain finishes, with Light Reflectance Values (LRVs) clearly indicated to support inclusive design and visual contrast requirements. Architects can coordinate lead-lined doors with wider interior schemes without compromising on performance.
The range also includes extensive glazing options that maintain both fire and radiation performance, plus accessories such as edge protectors and kickplates to extend service life. Severe duty ratings and long warranties (up to 10 years) help estates teams forecast lifecycle costs with greater confidence.