A building company and its supervisor have been fined a total of $45,000 after their negligence contributed to the roof of one of their West Australian houses blowing off and another being damaged during a storm.

Both buildings were damaged due to roof uplift during a storm south of Perth in June 2012, with parts of one roof found in a neighbouring yard. The Building Services Board found Danmar Homes failed to comply with engineering details in the approved plans for the construction of the two…