The statutory move has seen a report from FRP Advisory go to the Department of Business, Energy and Industrial Strategy.
All current directors and those holding office over the last three years have been questioned.
Details were contained in the latest administration update filed at Companies House since Shaylor’s collapse last June.
The update confirms unsecured creditors owed more than £19m are unlikely to get more than the current estimate of 0.39 pence in the pound.
Secured creditor Allied Irish Bank is owed nearly £14.5m of which £2.2m has been recouped following the sale of Shaylor’s Walsall offices.
One trade creditor said: “Once again the subcontractors lose out through no fault of their own.
“We are all owed a lot of money and again nothing seems to change to protect us from these failures.”