According to the Spanish Service of Radiological Protection (SEPR), for leaded doors, the lead sheet thicknesses needed are: 1mm for rooms with dental equipment and for mammography equipment, 2mm for conventional equipment in not too small rooms with a medium work load and 3mm in cases where the door is next to the equipment and with a high work load.
The calculations for the shielding of a room will be carried out by an expert from the SEPR, who will issue the certification. It is of paramount importance to guarantee that the joints – door frame – show the calculated shielding, with a rebate not less than 1cm between the shielding of the frame and door and between the shielding of the frame and wall where it is installed.