Fire destroyed construction materials at the failed Pattaya Dragon entertainment complex on Second Road.
No one was injured in the July 11 blaze. Five fire trucks responded to the fire and quelled the flames within 30 minutes.
The huge white elephant project, revived and closed three times, is being demolished. Demolition crews were using a steel cutter on a roof and a spark ignited some sound-proofing foam.
The contractor used fire extinguishers and water to control the fire until fire crews arrived.