A major construction company involved in the Christchurch rebuild says it uses migrant workers because they are cheaper than local builders.
It comes at a time when builders say they are laying off staff and facing financial ruin because of delays from insurance companies and the Earthquake Commission.
Leighs Construction says it has brought in 52 qualified Filipino construction workers with another "10 on the water" because subcontracting to local building firms cost too much.
"The reality is for a builder to employ another builder comes with premiums and we are trying to bring down the cost of the rebuild - it just doesn't work financially," Leighs Construction operations manager Graeme Earl said.
Mr Earl said Leighs paid the workers $22-$27 an hour - the same rate paid to local builders, but using local builders means extra overheads, including paying for their profit margin.