The owners of Jayco Caravans at Hexham are countimng the cost of a large early morning fire.

Around 50 firefighters and 13 fire trucks arrived at the business just after 4.30am to find a workshop, mezzanine and storage area engulfed in flames.

About 60 per cent of the 100 metre long workshop and a number of caravans have been destroyed, although fire crews managed to save the showroom.

It took crews about 4 hours to extinguish the main part of the fire, but they’ve spent the morning hosing down hot spots and cooling several gas cyclinders which threatened to explode.

An investigation into how the fire started won’t begin until the walls of the workshop are made safe and the area is cool enough for fire investigators to enter.