Hundreds of workers could lose their jobs at concrete and aggregates firm Hanson after the firm's business dried up.
Hanson has warned staff that job losses are "inevitable" after it finishes a report on how to stay afloat, due to be published later this month.
A spokesman for the Maidenhead-based company said demand for the firm's main products - including asphalt, concrete and cement - had fallen by more than 10 per cent during the year.
And things could get worse next year, with a predicted 5 or 6 per cent drop.
"We are a demand-led business - if people are not building we cannot sell our materials," the spokesman said.
"We announced to all employees on September 17 that demand has fallen."
He said the firm would have to "balance the size of the business to the prevailing market" by cutting cuts and reducing capacity - meaning workers will be out of a job.
The measures will be spelled out "in broad terms" by the end of the month, followed by consultations with staff.
But no-one's been spoken to yet, and Hanson hasn't worked out a final number.
GMB national officer Allan Black said: "This gives the lie to the coalition government's propaganda about light at the end of the tunnel.
"If we are still losing capacity in these most basic industries, then there is no sign of a construction-led recovery."
If you appreciated this article then please consider donating to the Morning Star's Fighting Fund to ensure we can keep developing your paper.
Donate to the Fighting Fund here
Fire Minister Brandon Lewis probably had a fair idea what Sir Ken Knight would deliver when he asked him to conduct an "independent" report into fire and rescue services in England.
As LGBT activists worldwide celebrate anti-homophobia day we are reminded of prevailing prejudice
Bradford has seen the launch of a new campaign to battle the sources of child sex exploitation - and combat far-right bids to make it a racial issue