Key Takeaways EMCOR's Building Services revenues rose 1.6% to $793.2M in Q2, ending four straight declines.Mechanical Services drove growth with mid-single-digit gains in HVAC, retrofit and repair work.Operating margin improved to 6.3% as higher-margin retrofit projects offset site-based weakness.EMCOR Group, Inc. (EME) has faced challenges in its Building Services segment, mainly from weakness in site-based operations. Contract losses and reduced activity weighed on results and the business recorded four c ...