The fire burning at the Vale Business Park in Llandow is now out.
It began on November 26. A spokesperson for South Wales Fire & Rescue Service says efforts to tackle the blaze were hampered by the construction of the building - a former aircraft hangar built to withstand bombardment.
More top news
Largely fine and dry overnight with just a few showers at times. Temperatures will tumble away so frost is likely!
A team from the Brecon Beacons National Park is airlifting nearly a thousand tonnes of stone and heather for major landscape repairs.
Cardiff City owner Vincent Tan has given his full support to under-fire Manager Russell Slade