The charity launched a crisis appeal in April as fund-raising events across the country were cancelled.
That has currently raised £500,000. But the charity needs more as demand for its services continues to grow.
Lighthouse chiefs have published their latest annual report showing £723,000 was given to families in need last year with nearly another £500,000 spent on education, training and a helpline app.
The 24/7 Construction Industry Helpline has seen a 57% rise in demand answering 2,615 calls for help.
Of those 445 were from families requiring emergency financial aid and 2,170 were for support on a variety of wellbeing issues as the charity continued its focus on mental health.
Bill Hill, CEO of the Lighthouse Construction Industry Charity said: “All of our charity events have been cancelled and with other companies unable to fundraise for us in many of the traditional ways, we are anticipating a massive income shortfall of £1 million.
“In April we launched our Crisis Appeal to address this issue and I am pleased to advise that almost £500,00 has been raised to date.
“I am always humbled by the way our industry pulls together in times of need and this has been no exception.
“We still have a long way to go to achieve our 2020 fundraising goal and secure our charitable services but I am confident that our industry will support us all the way.”
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