"Despite restructuring attempts including inter alia expansion into Pacific Island contracting, significant trading losses continued to be incurred in the months prior to receivership. The losses resulted in a substantial financial deficit which could not be funded by shareholders or other means," Mayo-Smith said.
Since being appointed, Mayo-Smith said the receivers had determined it was not viable for the New Zealand operations to keep trading.
The receivers said the company had assets with a book value of $11.6 million, based on accounts as at September 4.
A related company also in receivership, Asphalt Products, has assets with a book value of $481,000 while another, Delta Corporation, has assets worth $10.6 million.
To date, only around $4.4 million of assets from the group of companies had been realised.
Blacktop, Asphalt and Delta Corporation's debt is around $34 million, Mayo-Smith confirmed to the Herald.
Westpac, a secured creditor, is owed $12.5 million plus interest either directly or through cross guarantees.
Blacktop's employees are owed almost $525,000 while the IRD is owed around $505,000.
Blacktop owes unsecured trade creditors $11.2 million, the report said.
Mayo-Smith said in the report that this figure included "significant amounts owing in Fiji and Papua New Guinea".
"The process of realising the company's and other groups assets is not yet complete and therefore it is too early to determine with any certainty whether there are likely to be any funds available for unsecured creditors," he said.
