forumsafelincs

Hello. I'm fitting fire doors in a house I'm converting to an HMO. The frames are new and have been routed (by the supplier) for combined smoke/heat strips. I'm a plumber by trade but have hung a few doors before but need some advice on these please. I fitted the frame and got everything looking fine and hung the first door with an equal gap of no more than 3mm around the edge. However when I fitted the strips the door wouldn't close easily because of the smoke brush being too proud. To enable it to close smoothly to meet the regs I'd have to plane the door back by 2-3mm. Not only is this going to look very unsightly (a gap of 5-6mm) it then actually exceeds the regulation 3mm gap. Is it possible that the timber supplier didn't rout deep enough for the strip and if so should I just run through it with my router again? The plastic part of the body of the strip stands proud of the frame by about 1mm. If I routed deeper say to make the strip recessed by about 1mm it would solve the problem or is this not recommended. Any advice?