Building Tools™️ - www.buildingtools.co on Instagram: "Firestopping is science based. So please take note of the correct minimum & maximum ‘annular gap’ or space around the pipe / cable / duct. And correct ‘sealant depth’ is part of compliance. So a thin, haphazard ‘squirt’ of sealant around the service is not permissible. Here are the basic trade rules: • annular gap must be correct. This means your Fire Engineer needs to approve anything different than the test certification allows • sealant m