Tombstoneand the Handyman

Roof rejuvenation · ShingleLock™

Roof Rejuvenation on Hawaiʻi Island, From Waimea to Kona.

An oil replenishment treatment for asphalt shingle roofs. Not a replacement and not a coating. Two to three hours, a six-year transferable warranty, and up to 18 years of added roof life if your roof qualifies.
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Roof treatment

See the Treatment Move Across the Roof.

Roof treatment technician working safely on an asphalt shingle roof

On the roof

Applied by hand, one section at a time.

A controlled application lets the treatment soak into the shingles while surrounding property is protected.

Why North Hawaiʻi Roofs Dry Out Faster.

Tropical UV at elevation

Waimea sits around 2,700 feet. Sun exposure runs stronger than the mainland average and it never takes a season off. UV is the single biggest driver of oil loss in asphalt shingles.

Salt off the Kohala coast

Kawaihae, Puakō and the resort corridor sit right on the water, and the salt carries inland on the trades. It holds moisture against the shingle surface.

The Waimea gap

Wind funnels between the Kohala mountains and Mauna Kea. On a dry shingle it drives granule loss, and granules are the roof's only UV shield.

Vog

Emissions from Kīlauea drift up the leeward side on certain wind patterns, adding acidic deposition mainland roofs never see.

Wet side, dry side

Honokaʻa-side roofs fight rain and growth. Puakō-side roofs fight near-desert sun. Both are hard on shingles, in opposite directions.
ShingleLock treatment being sprayed onto grey asphalt shingles

Eligibility

Does Your Roof Qualify?

Good candidates

  • Asphalt shingle roofs, typically mid-life
  • Shingles still lying flat with sound structure
  • Granule loss present but not down to the mat
  • Stiffness, fading or early surface cracking

What rules a roof out

  • Active leaks or soft, damaged decking
  • Shingles missing, split through or badly curled
  • Granules gone down to bare mat across large areas
  • Metal, tile or non-asphalt roofing
Not every roof qualifies. Shingle age, overall condition and granule retention all factor in. Roof life extension depends on shingle condition. The inspection gives you a straight answer either way.

PRI laboratory results

Pliability improvement100%
Tear resistance increase16%
Granule adhesion improvementUp to 50%
Fire resistance improvement68%
Granule loss in hail testing0%
VOC content0.02%
Warranty6 years, transferable

Independent laboratory testing by PRI, Performance Review Institute (pri-group.com).

Roof treatment applied with a low-pressure sprayer and fall protection

Every Bundle Comes in by Barge. This Doesn't Need Any.

A typical Hawaiʻi replacement runs $11,000 to $16,000 or more for a roughly 1,700 sq ft roof, and construction costs here sit around twenty percent above the U.S. average. Then there's the lead time on materials and the wait for a crew.

Rejuvenation uses the roof you already own. No tear-off, no dumpster, no shingles shipped in, and a firm estimate at your free inspection.

Cost figures: Hawaii Roof Replacement Cost Guide, 2026. Not every roof qualifies.

The Process

  1. 01
    Book your free inspection
  2. 02
    We evaluate the roof, on the roof
  3. 03
    You get photos and a straight report
  4. 04
    Treatment in two to three hours
  5. 05
    Six-year warranty in hand

Questions

What homeowners ask before the free inspection.

Book a Free Roof Inspection

Find Out What Your Roof Actually Needs. Free.

Serving Waimea, Waikoloa Village, Kawaihae, Puakō, Hāwī, Kapaʻau, Honokaʻa, the Kona side and Hilo. The inspection is free and the answer is straight either way.

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Everything Under a Woof.

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