Geoff Lampard, distribution director at Marley Building Materials, said the shortage has been affecting the sector since March.
Lampard said: "You have a product and a customer but you can only offer a delivery time of five days. We're all waking up to this late."
The Quarry Products Association has released figures that show that the working time directive will cost its members an extra £355.8m. The QPA's economist Jerry McLaughlin said: "This is an issue regardless of the directive – that only adds to a problem that exists anyway."