Jobsite Delivery Time Windows and Proof of Delivery: What GCs Expect

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On an active job site, a late truck is not a minor inconvenience — it can idle crews, delay trades, and trigger back-charges.

Time windows are operational, not cosmetic

General contractors publish receiving windows for a reason: staging space, hoist availability, and trade sequencing. Distributors that treat "end of day" as good enough lose trust fast.

Reliable jobsite delivery requires:

• Committed windows agreed before dispatch releases
• Site access notes — gate codes, lift restrictions, foreman contact
• Driver instructions that survive handoffs between dispatchers

Proof of delivery is project documentation

GCs and owners increasingly expect evidence that materials arrived as billed:

• Timestamped photo proof at the drop location
• Digital signatures where the site requires sign-off
• Shipment references tied to your order or pick ticket

This is not paperwork for its own sake — it reduces disputes between supplier, GC, and subcontractor when schedules slip.

Vehicle and access mismatches cause most failures

The most common jobsite failures are predictable:

1. Wrong vehicle class for pallet weight or tailgate needs
2. Arrival outside the published window
3. No proof when the site super was not present to sign

Fixing these is a dispatch design problem, not a "find any driver" problem.

How distributors operationalize jobsite delivery

Leading building supply distributors separate counter business from jobsite routes — different vehicles, different cut-offs, same tracking standard.

Porterchain supports that model with recurring box truck and van routes across Ontario, live ETAs for site contacts, and proof packages your ops team can pull without calling the driver.

If jobsite delivery is a growing share of your volume, start by listing sites with strict windows and access constraints. Those routes are the template for a scalable program.