Do the roof first. The attic insulation, the ridge vent upgrade and the solar array all depend on a deck nobody is going to tear open again in three years, which is why the order of the work decides more than any single quote sitting in the stack. On an 1980s Overland Park two-story still running R-19 in the attic with a summer electric peak near $300, the roofing companies overland park ks worth calling are the ones that say so before they hand you a number. Three contractors each wanting to go first is not a scheduling problem. It is a warranty problem, and it stays stalled until somebody writes the sequence down.
Order Of Work Decides What Stays Warrantied
Every trade on this project writes its warranty around conditions it did not create. A solar installer will not cover panels mounted on an aging roof, because the mounts penetrate a surface someone else owns and will eventually replace. An insulation contractor will not stand behind blown-in depth in an attic that is not venting the way it should. Claims Journal, reporting on Verisk research in June 2026, described roof age as having a significant impact on the severity of damage a roof takes in wind and hail events, with deterioration accumulating through solar radiation, temperature swings and years of precipitation. In a metro that sees hail with some regularity, that age is the variable every other trade is quietly pricing around. So the roof goes on first and the rest of the work attaches to something new. Reverse it and the panels come down, the insulation gets disturbed, and two companies argue about which one owes you a repair.
Ventilation Belongs To The Roof Job
Ventilation is the step that gets orphaned. It sits between the roofer and the insulation crew, and in practice it typically means each one assumes the other measured it. What usually turns up on an early-80s two-story is a handful of static vents sized for the original attic, never recalculated after somebody added a bathroom fan or a second layer of shingles. Intake at the soffit has to balance exhaust at the ridge, and blowing insulation over the soffit baffles removes half of that balance without anyone noticing until a winter of condensation shows up on the sheathing. A crew doing a real site assessment before the tear off is standing in the one spot where the deck, the baffles and the vent count are all visible at the same time.
The Checklist Before Anyone Starts Work
Put the order in writing before anyone books a crew. Each step has one owner, and that owner’s job is to leave the next trade a condition it can actually warranty. Writing it out turns three separate sales conversations into a single schedule with dependencies, and a contractor who balks at being scheduled around the others has told you something worth knowing.
Example sequence for coordinating roof, ventilation, insulation and solar work
| Step | Who Owns It | Why It Comes at This Point |
| Roof assessment and replacement | Roofing contractor | Deck condition and structural integrity must be verified before adding weight or penetrations |
| Ventilation verification | Roofing contractor or HVAC specialist | Attic ventilation balance affects insulation performance and must be set before insulation density is chosen |
| Attic insulation upgrade | Insulation contractor | Proper ventilation beneath new insulation prevents moisture trapping and ensures warranty coverage |
| Solar panel installation | Solar contractor | Roof must be within its useful lifespan to match the 25-30 year life of the solar system |
Payback Math On Doing It Together
The cost of the wrong order is easy to price out, so price it out. Say the reroof quote lands at $14,800 and taking the attic from R-19 to R-49 adds $2,100. Mount panels first, then reroof three years later, and a 22-panel array has to come off and go back on at roughly $180 per panel, which is $3,960, plus about $900 of re-flashing and setup the crew builds back into the job. Getting the sequence backwards comes to around $4,860 in work that buys you nothing you did not already pay for once.
Before signing the solar contract, run the array through PVWatts, the free production calculator NREL publishes, and compare its monthly estimate against your own bills. What I cannot pin down is how a lower August bill splits between the new insulation, the corrected ventilation and the panels themselves. Nobody meters those three separately, and every payback sheet in my folder assigns the credit a different way. The receipts remember what I do not, and even they leave that question open.
One Sequence Saves Two Tear Offs
One roof, one lift, one set of penetrations. Most roofing companies overland park ks homeowners hire will quote a tear off and a deck inspection without ever asking what else is planned for the house, and the one that does ask is the one to keep on the schedule. Ask for the ventilation numbers in the estimate, hand that estimate to the insulation and solar bids, and let all three trades build around the same date. The efficiency project stops being stalled the moment the roof stops being the unknown.