$20k

Average cost of roof replacement

$2k

Average treatment

$18k

Your Savings!

Restore and preserve before you replace

Serving Local Families since 1982

Three Generations later, the Kobashigawa family has successfully owned and operated residential construction companies throughout the Windward side of Oahu. We continue to serve and protect our local Kamaaina homes by maintaining and extending the life of your roof with advanced technology and environmentally sustainable treatment solutions. Not only do we have the experience of building homes from the ground up, we also know how to extend the lifespan of your roof to help you save from a costly roof replacement.

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How It Works

As a roof ages, the oils in the shingles begin to dry-out and become brittle causing the granules to flake off. Overtime, the shingles lose the flexibility they need to expand and contract during changing weather elements throughout the day which can lead to a failing roof. Replacing your roof is costly but maintaining your roof is quick, cost-effective, and simple.

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What to Expect

Roof Health Assessment

At the initial consultation our roofing expert will examine your roof for leaks and shingle deterioration such as granule loss, roof flexibility, shingle cracking and curling. He will also examine your vents, flashing and identify areas of algae build-up. The condition of your roof will help us determine our recommended level of treatment. You will receive a final report of findings and recommendations.



Sample Assessment Report

Repair and Clean

On the day we are scheduled to treat your roof we will do a complete roof tune-up and repair any minor damage to avoid premature roof failure. Our roof rejuvenation treatment will smother and kill moss and algae growth, making your roof clean 4-6 months after treatment. For our customers with silicone coated roofs, we do offer a bleach-free cleaning solution that will remove any roof algae, lichen or moss.



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Restore and Rejuvenate

Lastly, depending on your roof’s condition our Koolau Roof Technician will apply our special Shingle Rejuvenation treatment to extend the life of your roof for another 5-15yrs. When first applied, the treatment will appear white and slowly soak into the shingle restoring its flexibility, granular adhesion and protective top coat. Each treatment is guaranteed for 5yrs.




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Our Customers

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Contact Us Today


Whether you have a question, would like to request a roof health assessment or a free estimate, we’re here for you. Let us help you maintain and preserve the life of your Roof.


Service Areas


All throughout Oahu Including: Kaneohe, Kailua, Mililani, Pearl City, Ewa Beach, Waipahu, and Hawaii Kai

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