Project Gallery
Roofs and rooftop systems, rebuilt right.
A look at recent commercial roofing and rooftop mechanical projects across Southern California — from emergency multi-trade repairs to planned AC platform upgrades. Residential projects are being added as new work is photographed.
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Featured commercial case studies below
Multi‑trade
Coordinated with HVAC, plumbing & solar contractors
Title 24
Compliant, fire‑retardant roofing systems
Case Study — Commercial
Emergency roof & rooftop mechanical rebuild
A leaking rooftop platform, water tank, and aging AC lines — stripped, rebuilt, and resealed in coordination with multiple trades.
The problem
Water heater and tank leaking, old AC lines over-maintained, units sitting too low to the roof.
What we found
The platform itself — not the roof membrane — was the source. Rusted through from the leaking tank above.
Rebuilding
Roof stripped and reassembled with a temporary platform holding tanks while the permanent structure went in.
Completed
Raised platform to code, new tanks, water heater and copper lines, all connections tied in and resealed.
“We can’t address the roof under or around a platform unless we take it all apart — so that’s exactly what we did.”
This emergency repair started with a straightforward leak and uncovered a bigger issue: the rooftop platform supporting the building’s water heater and tank had rusted through, and standard flashing repairs wouldn’t reach it. CrownLine coordinated a full teardown and rebuild — working alongside plumbing and mechanical trades to raise the platform to current building standards, replace the water tanks, water heater, and copper lines, and reseal every roof connection with standard and custom flashing.
It’s one example of how CrownLine manages large-scale issues that touch more than just the roof — keeping every trade working from the same plan so nothing gets rebuilt twice.
Categories:
- Emergency repair
- Multi-trade coordination
- Platform rebuild
- Custom flashing
Case Study — Commercial
Rooftop AC platform & unit upgrade
New platforms and flashing built for side-draft AC units, with one older unit replaced by a newer, more efficient model.
Before
New platforms and base flashings were set for the building’s side-draft AC units, and one of the older units was swapped for a newer, more efficient model. The new platforms also help reduce vibration and sound transferring into the building below.
After
A full roof replacement wasn’t needed here — CrownLine can upgrade what sits on top of a good roof without disturbing it, working in conjunction with the client’s other contractors on the mechanical side.
More From The Field
Additional project highlights
Title 24 roof coating
Bright white, Title 24 compliant coating with PolyGlass PolyFresko‑G FR fire‑retardant modified cap sheet, on a roof also built out to carry future rooftop solar — CrownLine’s standard, above California’s minimum requirements.
Down-draft AC replacement
A heavier, bulkier down-draft unit replaced with a smaller, stronger, more efficient AC — curb mount resized to match, with the roof kept fully watertight.
Residential Projects — Coming Soon
More photos are on the way, including residential work
This gallery is actively growing. If you’re a homeowner considering a roof repair or replacement, CrownLine handles residential projects too — reach out for a free estimate and examples from work near you.