Another riser, this one is sealed

Another riser, this one is sealed
By Phil Murphy

This sealed riser contains gas supplies to flats. It hadn't been inspected for fifty years. While it isn't a full height riser and does have separation at every floor level, when a Type 4 assessor opened up the riser at various levels they found the floor level separation had degraded and fire stopping had to be applied to reinstate the intended level of protection.
When carrying out this work on every floor in the block, work had to be halted three times when gas leaks were found.