Two trades, timed around the one moment they overlap
Most homeowners never think about their ductwork until it fails on its own — usually years after a re-roof, once the new roof has sealed the attic back up and the only way in from then on is cutting drywall from inside the house. But the moment a roof deck is open for a tear-off — before the new roofing goes down — that same ductwork sitting in the attic is fully exposed from above, no ceiling cuts required. Grandmark Service Company runs roofing and HVAC as one company specifically so we can use that window — replacing ducts through the open roof deck instead of waiting for a separate, more invasive job later. Read the reasoning in full on Why We Replace Ducts During a Re-Roof →
One project vs. two separate jobs
Same two outcomes — a new roof, new ducts — but the path to get there looks very different depending on whether they’re planned together or handled as two unrelated calls months or years apart.
Access point
Combo: through the open roof deck, no interior disruption. Separate: ceiling cuts and drywall patching required to reach the same ducts later.
Mobilization
Combo: one crew, one scheduled visit for both trades. Separate: two companies, two estimates, two sets of scheduling and cleanup.
Cost
Combo: typically less expensive than doing both separately, since mobilization and cleanup are shared across one job instead of two. Separate: full mobilization cost twice.
Contamination risk
Combo: ducts sealed from the outside, no interior dust or debris. Separate: cutting into ceilings to reach ducts introduces dust and debris inside the living space.
Accountability
Combo: one company stands behind both the roof and the ducts underneath it. Separate: a roofer and an HVAC company can each point to the other if something goes wrong at the interface between the two systems.
Timing
Combo: planned around the re-roof, so the ducts get addressed before they fail, not after. Separate: duct problems often go unnoticed until a comfort or efficiency issue forces a separate, unplanned call.
A Fresno homeowner’s combo project
One Fresno homeowner had an aging tile roof and ductwork that had never been touched since the home was built. Rather than treat them as two separate problems on two separate timelines, we planned the reroof and duct replacement as a single project — same crew, same access point, one video record of the whole job start to finish. Read the full story on Customer Story: A Fresno Homeowner’s Roof + Duct Combo Project →
From inspection to invoice, one process
Joint inspection
Our roofing estimator and HVAC technician assess the roof and the attic ductwork together, on video, in the same visit.
One written quote
A single scope and price covering both trades — no separate estimates to compare or reconcile yourself.
One crew, one visit
Roof tear-off exposes the attic; ducts are replaced or sealed through that same opening before new roofing goes down.
One invoice, one record
Completion video covering both the finished roof and the new ductwork, so you have a single, permanent record of the whole project.
When a combo project actually makes sense
Not every re-roof needs ductwork done at the same time — this is worth considering specifically when:
Ducts have never been replaced
If your ductwork is original to the home and your roof is also due for replacement, the timing overlap is the whole point.
You’ve noticed comfort or efficiency issues
Uneven cooling, rising energy bills, or dust coming through vents can point to aging or leaking ducts worth addressing while the roof is already open.
You want to avoid a second disruption later
If your ducts will need attention eventually, doing it during the re-roof avoids a future ceiling-cut job in a home you’ve already finished living around.
Roof + Duct Combo FAQ
Does combining the two jobs actually save money?
Typically yes — mobilization, cleanup, and scheduling are shared across one project instead of paid for twice. Your exact savings depend on scope, but it’s almost always less than booking a roofer and an HVAC company separately for the same work.
Do you replace the ducts, or just inspect them?
Both, depending on condition. During the joint inspection, our HVAC technician assesses whether ducts need full replacement, sealing, or are still sound — you get a straight recommendation, not an automatic upsell.
Will this delay my roof replacement?
No — ductwork happens through the same opening the roofing crew is already using, on the same timeline as the re-roof itself.
Is this available everywhere Grandmark works?
The combo project requires both roofing and HVAC crews in the same market. Today that’s Fresno and Visalia. See our roofing services and HVAC services pages for full coverage details.
Do you offer financing for combo projects?
Yes — combined roof-and-duct projects qualify for financing the same way roofing or HVAC financing does on their own. Ask during your joint inspection.
See if a combo project makes sense for your roof
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