Is the item or event you are claiming as an unforeseeable, excusable delay really unforeseeable? This is not a trick question.
Just because your construction contract identifies items or events that constitute unforeseeable, excusable delay does not mean those items can be used as a blanket excuse or crutch for the contractor. That would be unfair.
For instance, it is not uncommon for a construction contract to list as unforeseeable, excusable delay the following events or items: “(i) acts of God or of the public enemy, (ii) act of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from unforeseeable causes beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers.” See, e.g., F.A.R. 52.249-10(b)(1). While the itemization of excusable delay may be worded differently, the point is there may be a listing as to what items or events constitute excusable delay. An excusable delay would justify additional time and, potentially, compensation to the contractor.