Winter heating is a line item. Summer cooling is somebody’s margin.
That’s the argument Stacy Arnold, director of safety for the Associated General Contractors of Minnesota, made to MPR News during an extreme heat week that had temperatures near 80 degrees in downtown St. Paul before 8 a.m.
The minimum isn’t a plan
“A lot of contractors really just stop at the minimum of water and shade,” Arnold said. “There’s a lot of pressures to get jobs done from clients.”
Her proposed fix is commercial rather than regulatory. “One of the things that I really talk about with our contractors is really pushing more for summer conditions to be included in the bid process.”
Every northern contractor already budgets temporary heat, ground thaw and enclosure for winter work, and nobody argues about it because the quality consequences are obvious. Concrete won’t cure. Cooling gets treated differently, as goodwill or overhead, which means it competes against margin instead of sitting in the estimate.
The exposure people miss is indoors
Arnold flagged a counterintuitive risk. Interior crews working in a closed-up building that isn’t yet conditioned can be worse off than crews in the sun. Permanent HVAC often can’t be run without voiding equipment warranties, so the only air movement comes from fans pushing hot stale air around a sealed envelope. Drywall, finish and MEP trades working ahead of building turnover are the ones exposed.
Acclimatization is the other underweighted variable. It can take up to 14 days for a new or returning worker to adapt, which is why heat incidents cluster among first-week hires and crews coming back from layoff.
Regulation is stuck in the middle
Minnesota has no state heat standard. There’s a federal emphasis program driving inspections but no final rule, and as a State Plan state Minnesota can adopt or exceed whatever eventually lands. Minnesota OSHA Compliance walks CHASE partnership projects voluntarily every four weeks alongside Arnold.
The industry recorded one heat-related fatality in Minnesota last year.
Scheduling around the heat runs into its own wall. Starting earlier is the obvious move, and noise ordinances in many communities bar work before 7 a.m. Then there’s culture. Arnold described the persistent instinct to keep your eyes down and push through, which is the same instinct that keeps near-misses off reports.
Michael New, working the John Ireland Bridge crew, offered the field version: “I recommend keeping your skin covered so the sun isn’t beating on your skin. Wear wicking material.”