The Bang Bor police station was alerted that the worker, who was identified only as Loei native Adisorn, 35, had been found dead in a shanty house at a construction campsite in Tambon Bang Bor in Bang Bor district at 10am.
A doctor who inspected the scene with police believed he died about two hours earlier. The cause of death was unknown.
Other workers said the man was a heavy drinker and had been seen getting up early Monday and going out of the campsite to buy liquor. He had also complained that the weather was cold.