"Dozens of people are suffering really badly. They need a lot of support to get through this sorry mess because they've got the financial worries and the loss of security. For some people there's no hope."
Gray said local authorities and lawyers who charged huge fees shouldered much of the blame.
"The result is they don't have enough money to fix their homes and they're just dying a slow and miserable death in their rotten, defective homes."
Many were once successful businesspeople who were struggling to cope with the stigma of mental illness. "We've got high-profile people in executive jobs who won't get help because of the stigma of depression - they fear how that will impact on their future and their career," said Gray.
He knew of one "very well-known businessman" who had been hit particularly hard. "He's saying 'I'm tough, but this has just brought me to my knees'."
Gray wants the Government to put more effort into helping homeowners fix their properties and offer help to people who aren't eligible to go to the tribunal or can't afford litigation.