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Hawaii's Trusted Roof Maintenance Company


Free Roof Assessment

After we schedule  your appointment, I will send out a free roof measurement report.  This will give us a rough idea of the size of your roof, and you can keep this report for your reference.

On our initial visit, I will thoroughly inspect your roof, focusing on the following areas:

*algae/moss/lichen growth

*shingle degranulation

*missing/loose/cracked shingles

*roof penetrations 

*metal flashings

*potential leak areas

Following our assessment, I will provide a detailed photo report of my findings and recommendations.

Roof Tune-up &
Roof Shampoo® Cleaning

Our roof tune-up will provide the preventative roof maintenance needed to extend the life of your roof and avoid premature failure.  A few examples of issues I will address are:

*nails backing out of shingles

*securing loose shingles

*replacing gaskets on vent stacks

*sealing cracks to avoid potential leaks

*refastening floating flashings

We will also remove the ugly black streaks off your roof, caused by algae called gloeocapsa magma.   Our Roof Shampoo® roof cleaning method uses safe and effective roof cleaning products to clean algae, moss, and lichens and will not harm you or any landscaping around your home. Roof Shampoo® is the green, eco-friendly roof cleaning that does NOT contain dangerous chlorine bleach or phosphates.   Koolau Roof Tech is the only certified Roof Shampoo® contractor on Oahu, and is happy to provide an alternative to bleach-based roof cleaning.  For more information on Roof Shampoo®, click here.

Roof Maxx Treatment

Similar to applying moisturizer to dry skin, Roof Maxx is gently sprayed onto your roof where millions of micro-beads will immediately begin rejuvenating and restoring the pliability of brittle asphalt shingles.  For an average home, the treatment is quick and clean and can usually be completed within two hours.  Roof Maxx is 100% safe for plants, pets, and people, because it’s an all-natural bio-based product. Any overspray can simply be rinsed away with a hose or with the next rain. Click here for more information on Roof Maxx.


What's Roof Shampoo®?

Our bleach-free, green, ECO-FRIENDLY, low pressure Roof Shampoo® cleaning method uses a proprietary soap that is specially formulated and buffered to be safe on all asphalt and fiberglass shingles. It will not harm any landscaping around the home, yet is 100% effective at removing roof stains from algae. No damaging high pressure is ever used and absolutely NO scrubbing or brushing. The results are immediate and complete.  We take the time to actually get on your roof, inspect it, and perform the cleaning using top quality, eco-safe products and state-of-the-art equipment.  With the additional service, skill and labor required to perform a Roof Shampoo®, you may expect that our process would cost more than soft washing.  However, in many cases, Roof Shampoo® will cost less and provide a superior service.


A roof covered with dark streaking stains is actually infested with algae called Gloecapsa Magma.  Hawaii’s humid weather provides the perfect conditions for algae to thrive.  Besides making your roof look old and dirty, the algae feeds on the limestone fillers in your asphalt shingles and causes premature roof failure.  Therefore, the most important reason to clean your roof is to stop your roof’s aging process immediately!  A clean roof is a healthy roof!   As a bonus, your roof will appear new, restoring your home’s curb appeal!

Demo of Roof Shampoo Low Pressure Rinse

Roof Shampoo Before and After Pictures


What's Roof Maxx?

As a roof ages, the petrochemical oils dry out and the
shingles' waterproofing asphalt becomes increasingly brittle. Movement-related stresses cause the shingle to slowly break apart, similar to the way a pothole develops in the road.


Roof Maxx is a powerful scientifically-formulated
all-natural treatment that’s 100% safe for people, pets, property, and the environment.


Soy Fusion technology allows millions of micro-beads of soy methyl esters to quickly penetrate aged roof shingles and restore it's flexibility within 72 hours, allowing the roof to freely expand and contract.

Roof Maxx is the world's first sustainable roofing solution. By extending the roof's life we reduce its carbon and environmental footprint.

Roof Maxx allows homeowners to delay the cost of expensive roof replacements and keeps old roofing material out of the landfills.  A Win-Win situation for everyone! 

Roof Maxx featured in a PBS Mini-Documentary


Customer Reviews

Don't just take our word for it, listen to what our customers say about Koolau Roof Tech!

"Excellent customer service. Also seemed sincerely concerned about the condition of my roof."

CR from Kaneohe


About Koolau Roof Tech

We come from three generations of residential construction experience.  My grandfather, Taro and my father Mel, have both owned successful construction companies located on the Windward side of Oahu.  I grew up working alongside both of them and bring that priceless experience to Koolau Roof Tech.  My name is Kirt Kobashigawa, I'm the owner and operator of this locally owned small business.  Besides learning how to build a home from the ground up, the most important lesson they taught me was how to treat your customers.  Our family has always prided ourselves on building relationships with our clients, and we will continue to provide that local-style five star service.

Contact me directly:

Owner: Kirt Kobashigawa

Phone: (808) 292-2205

Email: kirtk@koolaurooftech.com


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roof shampoo before and after3