February 4, 20179 yr comment_9749 Hi, A contractor has installed a 20mm wide groove in the door frame head for the intumescent smoke seal, whilst on the jambs it's only 10mm. We only require a 30 minute fire rating so I thought 10mm was acceptable on jambs and head. However they have said new regulation state that doors over 2040mm high must have a 20mm wide groove? Is this correct? Many thanks, Eddie Report
February 4, 20179 yr comment_9758 The only reference to seal width I can find is purely based on door fire resistance and nothing to do with size. The recommended seal size for most modern 30 minute doors, other than doorsets, is 15mm X 4mm. The recommended seal size for most modern 60 minute fire doors is 20mm X 4mm, or 2 No. 10mmX4mm. This is from BWF-CERTIFIRE who are the fire door industries' Scheme to ensure the correct standards are used in relation to fire doors and their installation Report
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