Firefighters were called to Drill Masters-Eldorado Tool last Thursday to extinguish a roof fire, the second roof fire at the location in two years.

At approximately 10:49 a.m. Nov. 15, Milford Fire dispatch received a 911 call from an employee of the Drill Masters-Eldorado Tool Company located at 336 Boston Post Road, reporting smoke inside the building due to a possible roof fire.

Firefighters arrived and were told that a roofing contractor had performed work on the building a short time before. An investigation revealed an active smoldering fire inside the built-up roof. Fire crews opened an area of the roof with hand and power tools to expose the smoldering fire, which was quickly extinguished, according to Battalion Chief Anthony Fabrizi.

No injuries were reported.

Employees were allowed to return to work after firefighters deemed the building safe.

A similar fire occurred in 2016. That fire started about about 7:40 a.m. Wednesday, Aug. 24, and firefighters were called about an odor of something burning inside the building. Firefighters arrived and were told that roof work had been done the day before.

Firefighters investigated and found an active smoldering fire inside the built-up roof of the structure. Firefighters opened an approximately 20′ x 12′ area in question with hand and power tools to expose the smoldering fire, which was quickly extinguished, very similar to last week’s incident.

Fabrizi said investigators could not determine if it was the same roofing contractor doing the work in both incidents.

“The contractor was using a torch while making repairs to the roof,” Fabrizi said. “The construction of the roof at Eldorado Tool is a steel deck covered by an approximate two to three-inch thick fiberboard and then finally a rubber membrane to prevent water from getting into the structure. That fiberboard will burn and smolder easily when exposed to flame. This was the case in both incidents.”

Eldorado Tool has long been an employer in Milford, dating back to 1948, according to the company’s website.

Drill-Masters, a deep hole drilling company founded in 1972, purchased Eldorado Tool in 2002, and the combined company became known as Drill Masters-Eldorado Tool, employing about 100 people, the company website states.

The company owners could not be reached for comment about the roof fire.