Here’s why roofing and HVAC jobs fail to actually fix anything
The deck is wide open. The ducts are right there. But your roofer isn’t an HVAC tech, so they do nothing — you get a new roof with a contaminated, leaking duct system underneath it. Or the AC gets replaced, but the roof penetrations get patched by someone who doesn’t roof for a living. Six months later: water damage, callbacks, and nobody taking responsibility. No documentation. No video. No record of what was actually done. Just a guess dressed up as a quote — and the bill arrives before the problem is confirmed. Homeowners end up paying twice for a problem that should have been solved once — once for the “fix” that missed the actual cause, and again for the repair that finally addresses it, usually with a different company entirely.
Two separate contractors
- A roofer who won’t touch ducts — the deck is open, but a roofing-only crew has no reason to look, so a leaking, contaminated duct system goes right back under the new roof, untouched.
- An AC tech who doesn’t roof — new system installed, but the roof penetrations get sealed with caulk by someone who installs equipment for a living, not roofs.
- Two invoices, zero accountability — when something fails at the seam between the two systems, each contractor blames the other. Neither documented the handoff.
The Grandmark combo
- One crew accesses your ducts through the same open deck — no ceiling cuts, no contamination, no second mobilization.
- Every penetration sealed by a licensed roofer — not caulked by whoever installed the equipment.
- One invoice, one crew, full video record — if anything ever needs a follow-up, there’s no one else to blame.
Roof, HVAC, and solar — physically connected, coordinated by one crew
Roof, HVAC, and solar are physically connected whether a contractor treats them that way or not. We’re the only contractor in Central California that coordinates all three under one team, so nothing gets missed at the boundary between trades. When the deck is open, it’s the best time to access your ducts — no contamination inside your home, no ceiling damage, no shortcuts. Every penetration on every HVAC job is sealed by a professional roofer, not caulked by the AC tech on his way out the door. That’s the entire reason our combo jobs don’t come back.
This wasn’t the plan from day one. What started as a roofing company in Fresno grew into this after seeing the same pattern repeat on job after job: roof failures traced back to HVAC penetrations and dirty ducts that nobody had touched during the roofing job, and AC systems replaced by a company that had no idea the flashing above the new equipment was already failing. Adding HVAC and solar wasn’t a growth strategy — it was the only way to actually stop the callbacks, because the callbacks were never really roofing problems or HVAC problems. They were coordination problems.
Full diagnostic. One clear scope. Nothing left to guesswork.
Full diagnostic
Roof, attic, ductwork, and HVAC system inspected together, on video, before any scope is written.
HVAC replacement
Manual J load calculation, properly sized equipment, installed while the deck is already open.
Roofer-sealed penetrations
Every duct and vent penetration sealed by a licensed roofer — not caulked by whoever installed the equipment.
Ducts cleaned & sealed
Contaminant-free duct replacement through the same access point — no ceiling cuts, no separate mobilization.
Every job documented from first inspection to final seal. You watch it yourself — roof, ducts, penetrations, solar panels, all on camera, all yours to keep forever. Pre and post video report included on every combo job, no exceptions. That video record matters most at the exact moment a homeowner usually has the least leverage: if you ever sell the home, file an insurance claim, or need to show a future contractor exactly what was done and by whom, you have it — not a verbal assurance from a company that may or may not still be around.
One mobilization instead of two
Hiring a roofer and an HVAC company separately means two estimates, two crews, two mobilization fees, and two separate cleanup passes — often for work that could have happened in a single visit. Combining the job through the same open access point is typically less expensive than doing both separately, and it removes the coordination risk entirely: there’s no gap in the schedule where your home sits with an open roof deck and no duct work scheduled, and no handoff between two companies who’ve never spoken to each other about your specific job. It also means only one company to call if something ever needs a follow-up — no arguing over whether a problem originated on the roofing side or the HVAC side, because the same crew did both.
What homeowners say after the combo job
Over 1,200 verified reviews across Google, Yelp, BBB, and HomeAdvisor. Here’s what three of them said.
Our house is finally comfortable in the summer. They did the roof and the ducts at the same time — I didn’t even know that was possible. Best decision we’ve made as homeowners.
I’ve had contractors tell me what they did. Grandmark showed me on video. I watched every step of the job myself. That’s the only way I’ll ever hire a contractor again.
Grandmark did an amazing job fixing our roof and duct work together — recommend them 10/10. Thank you for making our home look great.
Roof + Duct Combo FAQ
Is the combo job actually cheaper than hiring separately?
In most cases, yes. You avoid a second mobilization fee, a second cleanup pass, and the scheduling gap between two separate companies. The exact savings depend on your specific scope, but it’s typically less expensive than the same work done as two disconnected projects.
Do I need both a new roof and new ductwork to qualify?
No. We combine the jobs when it makes sense — if your roof and duct condition both point the same direction during inspection. If only one system genuinely needs work, we tell you that honestly instead of upselling the other.
Who actually seals the roof penetrations — the roofer or the HVAC tech?
A licensed roofer, always. This is the detail most combo jobs get wrong elsewhere: an HVAC technician who isn’t a roofer caulking a penetration instead of properly flashing it. Every penetration on every job we do is sealed by someone who roofs for a living.
Does this work on solar homes too?
Yes. We handle solar panel removal, storage, and reinstallation as part of the same job, protecting your solar warranty and documenting the removal and reinstall on video like everything else.
Is this available at every Grandmark location?
Full roof + duct combo service is currently available in Fresno and Visalia, where we run both trades. Sacramento and Bakersfield handle roofing (and AC in Bakersfield’s case) — check your local page for what’s available in your area.
Do you offer financing for combo jobs?
Yes — combined roof-and-duct jobs qualify for financing the same way either trade does on its own, with $0 down and same-day approval in most cases. Options are discussed during your free inspection so you know what qualifies before you commit.
See the combo job by trade and location
All Roofing Services →
Repair, replacement, and specialty roof systems across every Grandmark market.
All HVAC Services →
AC repair, replacement, heating, and emergency service across all 5 California markets.
Fresno Roof + Duct Combo →
The combo service as offered by our Fresno crew, our founding and largest market.
Also available through our Fresno HVAC team, and coming soon to Visalia.
Get your free combo inspection
One crew, one video record, one invoice. See exactly what your roof and ductwork need before you commit to anything.