Firefighters have been told not to use ladders to fit smoke alarms in homes - in case they fall.
Officers had been using householders' ladders to fit the alarms.
Humberside Fire and Rescue Service bosses say this breaks new health and safety laws, reports the Sun.
Now, Fire Brigade Union officials have told officers not to use any equipment that householders suggest they borrow.
One firefighter said: "Going up ladders is second nature to us. It's crazy. We're more at risk decorating at home."
Another said: "Where will this end? Will we still be able to carry a rescued person down a ladder or enter a burning building without health and safety on our back?"