Roof rebuild — replace only what's damaged.
Most roofs don't need a $15,000–$75,000 tear-off — they need a strategic rebuild of the failed sections while preserving the 60–80% that's still sound. Since 1974, Mike McGilvary Roofing has rebuilt thousands of Palm Beach County roofs: valleys, underlayment sections, flashings, and storm-damaged slopes — saving owners tens of thousands.
Accredited · Certified · Recognized · Family-Owned Since 1974
A rebuild fixes the failure — without throwing away the good roof.
On most roofs, only a fraction has actually failed: a valley, a slope, the underlayment around a few penetrations. A roof rebuild strategically removes and replaces those compromised sections — decking, underlayment, flashing, surface materials — while preserving the 60–80% that still has years of life left.
A targeted rebuild costs $3,000–$12,000 for most homes instead of $15,000–$75,000+ for a full replacement, and extends the roof's life 10–20 years. If the damage is genuinely widespread, we'll tell you a replacement is the smarter spend — honest assessment, not upselling.
The honest test: rebuild, or replace?
Our free inspection settles it with evidence — here's the framework we use.
Ideal rebuild candidates
A roof 10–30 years old with localized damage — failure confined to a valley, one slope, or a few penetrations; most tiles or shingles still sound; underlayment failed only in limited sections; isolated storm or flashing damage; or a budget that makes a full tear-off unnecessary right now.
When we recommend replacing
When the roof has reached end of life (20–25 yrs shingle, 40–50+ tile); underlayment has failed roof-wide; the deck is structurally compromised throughout; materials are discontinued and unmatchable; repeated repair costs approach replacement; or a code upgrade requires a complete system. We say so plainly.
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The components we rebuild — and the ones we preserve.
We rebuild the failed parts of the roof system to current Florida Building Code, integrating seamlessly with the sound materials we keep.
- Decking repair — damaged plywood / OSB replacement
- Underlayment & surface material replacement
- Flashing reconstruction — valleys, chimneys, vents, walls
- Drainage improvements — slope correction, scuppers
- Code-compliant attic ventilation upgrades
- Structural reinforcement — truss / rafter repairs where needed
The failures we rebuild every week.
Most leaks trace to one of a handful of failure points — we rebuild the cause, not the symptom.
Valley failure
Valleys concentrate water flow and fail first. We rebuild them with upgraded underlayment, proper metal flashing, and matching tile or shingle — fixing the leak source while preserving the other 90% of the roof.
Underlayment section
When underlayment fails in one slope or around penetrations, we lift the surface materials, replace the deteriorated moisture barrier, and reinstall matching tile or shingle — before it rots the deck inside.
Storm damage
Hurricanes often hit one side of a roof and leave the rest intact. We rebuild the damaged slope to current wind-resistance code while preserving the undamaged areas — and document everything for the claim.
Single-slope
One slope wrecked by trees, deterioration, or bad prior repairs? We rebuild just that section — common on multi-level homes where upper slopes concentrate wear on the lower roof.
Chimney & penetrations
Chimneys, skylights, and plumbing vents are chronic leak zones. We rebuild the flashing and the surrounding materials properly, restoring the waterproofing instead of re-sealing a failure.
Addition tie-ins
New additions create roof-to-roof tie-ins and valleys that leak when rushed. We rebuild the connection with proper flashing and matching materials for a seamless, watertight transition.
We rebuild the failure — and keep the good roof.
On most roofs only a fraction has actually failed. We strip and rebuild those sections — underlayment, flashing, decking, surface materials — to current Florida code, and leave the 60–80% that’s still sound untouched.
A methodology refined since 1974.
Damage assessment
A free inspection with attic thermal imaging to find hidden moisture, gauge underlayment condition, and check structural integrity — mapping exactly what needs rebuilding versus what we preserve.
Rebuild-vs-replace analysis
A written estimate comparing rebuild and full-replacement cost side by side: what's damaged, what's salvageable, the price of each path, and the lifespan you gain. You make the informed call.
Material sourcing
We identify your exact tile profile or shingle line and source matching (or compatible discontinued) materials, so the rebuilt sections integrate invisibly with the original roof.
Rebuild & warranty
Damaged materials removed, compromised underlayment and decking replaced, flashing reconstructed, surfaces reinstalled — section by section, to code, backed by a 2-year workmanship warranty and full photo documentation.
What a rebuild actually costs in Palm Beach County.
Real ranges — usually a fraction of a replacement.
$2,500 – $12,000
A single valley rebuild runs $2,500–$4,000; a storm-damaged slope or a section of underlayment $4,500–$12,000 — addressing the failure without touching the sound roof.
$15K–$50K+ saved
Most rebuilds total $3,000–$12,000 versus $15,000–$75,000+ for a full tear-off. You keep the 60–80% that's sound and gain 10–20 years of life.
Deferring a rebuild lets a small leak rot the decking into a five-figure repair — and Florida insurers increasingly weigh roof age and condition at renewal. A documented rebuild, with an optional 5-Year Roof Certification, is often what keeps coverage in force under Florida's Roof Age Law (§627.7011).
Real homes. Real documentation.
Short walkthroughs from real Palm Beach County projects — what Mike found, what he documented, and the work that followed. Outcomes vary by roof; nothing here is a guarantee of any insurance result.
WatchThe Drummond Roof
An insurance review prompted a closer look. Documentation of the tile system's actual condition may help the homeowner make an informed decision — repair, rebuild, or replacement. In the walkthrough, Mike shows how a documented condition report — not the roof's age alone — guides that decision.
WatchThe Amber Roof
Full condition documentation of an older tile roof. Thorough records of repairability and remaining useful life may be useful for insurance and future planning. The walkthrough shows how Mike records the roof's condition, repairs, and remaining useful life into a documentation package the homeowner can keep on file.
WatchThe Wellington Rebuild
A section rebuild that preserved most of the existing roof — replacing the failed underlayment, valley metal, and damaged tile instead of a full tear-off.
Rebuild specialists since 1974 — not a tear-off sales team.
Rebuilding roofs since 1974
Thousands of rebuilds across Palm Beach County over 50+ years. We know which failures can be rebuilt, which can't, and how to maximize the roof you already paid for.
Honest rebuild-first assessment
We only replace what's actually damaged — the rebuild approach saves owners $15,000–$50,000+. And when a full replacement genuinely is the smarter spend, we tell you plainly.
Seamless material matching
Decades of sourcing relationships mean we match tile profiles, shingle blends, and discontinued materials so rebuilt sections disappear into the original roof.
Licensed, insured & proven
Florida Certified Roofing Contractor CCC1331721 (active since 1974), BBB A+, BuildZoom top-10%, 5.0 across Google, Yelp & Facebook, and a 2-year workmanship warranty — double the standard.
A rebuild touches the whole roof system — explore tile repair, leak repairs, a free inspection, or a 5-Year Certification.
Palm Beach County rebuild questions, answered.
What's the difference between a roof rebuild and a roof replacement?
How much does a rebuild cost compared to replacement?
How long will a roof rebuild last?
Will rebuilt sections look patchy?
How do I know if I need a rebuild or a full replacement?
Will insurance cover a roof rebuild?
Find out what your roof actually needs.
Tell us about your roof and we'll come take a look — thermal imaging, an honest rebuild-vs-replace assessment, and zero pressure. Family-owned in Palm Beach County since 1974.