Guest Harvey Posted November 10, 2023 Report Share Posted November 10, 2023 I'm looking for a bit of help on some locks we have come across on flat entrance doors and riser doors. We see quite a few locks similar to the one in the picture. Some have correct BS standard markings on and others don't. However, on all doors it is very easy to see through the lock to the other side of the door. Often the cutting around the keyhole is oversized and not filled with any kind of intumescent protection. My concern is that this type of lock could let smoke/flames through very easily. Are these locks suitable? And what repairs should be done? I'm hoping some of you might be able to help me. Thanks. Quote Link to comment Share on other sites More sharing options...
Neil Ashdown MAFDI Posted November 13, 2023 Report Share Posted November 13, 2023 Guidance available here: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1124733/Approved_Document_B__fire_safety__volume_1_-_Dwellings__2019_edition_incorporating_2020_and_2022_amendments.pdf Building Regs Approved Document B appendix C section C15. Also 'Hardware for Fire & Escape Doors: Code of Practice' http://firecode.org.uk/Code_of_Practice_hardware_for_fire_and_escape_doors.pdf Clearly, this door is damaged beyond repair at the closing stile and the markings on the lock faceplate cannot be read from the photo so unsure if the lock pre-dates Construction Products Regulations. All parts of the lock should be fitted tightly to the door leaf and door frame with no unnecessary gaps or voids from 'over-morticing' and at the correct position (usually between 800mm and 1200mm from the bottom edge of the door depending on the door manufacturers installation requirements). Quote Link to comment Share on other sites More sharing options...
Guest Paul the joiner Posted November 13, 2023 Report Share Posted November 13, 2023 Basicly the door is seriously weakened both for security and fire safety, fire safety because there is a key hole through the door which in a fire will suck air through to make the fire worse, and eventuality burn into the core of the door, needs to be a euro profile lock and cylinder with intumecscent pads around the lock in the mortice slot, id also check for 3 ball bearing hinges and marked for fire doors, tap the door hard to check its not a hollow flush door eg egg shell type filling inside. Quote Link to comment Share on other sites More sharing options...
Guest Harvey Posted November 20, 2023 Report Share Posted November 20, 2023 Thanks for your help, much appreciated. Quote Link to comment Share on other sites More sharing options...
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