Illinois contractors work two peaks, not one
Cold months and wet springs
Most seasonal advice for trades businesses assumes a single peak. Illinois has two, and they demand different things. The cold months bring heating emergencies where response time decides who gets the job. Spring storms bring water intrusion, sump failures and drainage enquiries that arrive together on a single night and then keep coming for a fortnight.
A business that prepares for one and improvises the other loses the same revenue in the same season every year, and usually concludes that the season is just difficult. The preparation itself is modest: a capacity view for each peak, triage rules configured in advance, and message templates written while things are calm.
Freeze and thaw does its own damage
The freeze-thaw cycle produces a distinct category of work for roofing, gutter and exterior firms: ice damage, water tracking into places it should not, and repairs that reveal an older problem. Much of it recurs on the same properties, which makes it one of the more predictable parts of an Illinois contractor year.
That predictability is worth using. Dated outreach ahead of the season to the customers whose properties had problems last winter, run from the customer list you already own, consistently beats trying to buy the same work at the moment every other contractor wants it.