i have steel structure which is coated in intumescent paint, this has now been spot welded and the paint on the underside has expanded. Does this need replacing or is the performance unaffected for the future.
This will need repairing/replacing immediately. It is important to seek the manufacturer's advice of the intumescent system that is currently on the steel in order to ensure repairs are carried out in accordance with their requirements to ensure the fire protection is maintained.