Barney057

Hi everyone,my appologies if this has been covered elsewhere. I have a lot of nominal fire doors with gaps around them more than 4mm meaning i can't get a cold smoke seal with my intumescent brush strips. The doors are a flush veneer faced door with a chipboard core.i was wondering if anybody knew if i would be ok to re edge them with hardwood lipping or if it is a no no due to the core of the door? I m sure it isn't a problem re edging solid timber core doors Thanks

I wonder if anyone has any thoughts on the use of extended pile intumescent brush strips to create a cold smoke seal where the gap around a nominal fire door is greater than 4mm. Thanks in advance for replies

Hi i wonder if anybody can clear this up for me. I work for a housing association and at the moment we are very busy with bringing doors up to fd 30s standard.We have a lot of flat front doors that are metal faced composite doors and they have been installed with a 20mm flat intumescent strip in the frame, no brush for cold smoke seal. Our suveyor has tequested we swap these for 20mm intumescent brush strips which is fair enough but as the door sits against a foam flipper gasket doesnt this constitute a cold smoke seal? Some of these doors are less than 2 years old so surely they must comply with recent fd30s regulations for flat front doors?Any oppinions guys?