Fire crews from Llantwit Major, Cowbridge and Bridgend are dealing with a fire at the Vale Business Park in Llandow.
South Wales Fire and Rescue Service has confirmed that there is no asbestos within the building, but they are asking people to keep their windows and doors closed.
More top news
Cold, breezy and generally cloudy at first with further wintry outbreaks on the hills
All primary and secondary schools in Wales have been categorised in a new colour-coded system. Is your school green or red?
A yellow warning for snow and ice on Thursday night and Friday has been issued.