Some people enjoy the sound of rainwater gushing out of their roof rain gutter system, especially when there is no debris blocking the water’s path and the water dumps out onto the ground.

But what if rainwater moves smoothly, but the gush takes a pit stop onto another area of the roof?

This situation may develop when homeowners add to the original footprint of their home with extra rooms or car port. Those new build-outs need a roof and rain gutters, too.

Consider water flow
You may ask yourself: Why would Murakami Roofing have two cents to comment on rain gutter design?


Because water is one of nature’s strongest forces — water has the power to nourish, or destroy. When rain gutter water pours out onto a section of your roof, over time, it wears down on your roof shingles and the layers underneath, which protect the interior of your home.

Water pouring onto your roof is like having a cavity in your tooth — the longer the cavity goes untreated, the more damage results. Anywhere the water goes, there’s potential for damage to your home’s foundation, attics or surrounding landscape.
In a build-out plan, rainwater flow isn’t usually considered so the original rain gutters often end up overhanging the new roof. Planning any addition to the home should include your roof and rain gutter design.

Avoid creating a “valley” between the old roof and new roof. The divot where the new and original roof meet may cause water to pool and eventually cause weakness and damage.


Most roofs are sloped and the design helps move water off the roof and into the rain gutters. Consider where the rain gutters pour out and avoid creating an overhang from the original roof. It may be a good time to reroute the rain gutter flow.

Instead of an overhang, consider a “tie-in” where the new roof is directly connected to the original roof’s slope. This creates a seamless transition with no problematic overhang in the rain gutter path.

Call roofing professionals
The planning phase is a great time to consult professional roofers who can provide their best recommendations depending on how the addition will be connected to the original home.

Murakami Roofing professionals are happy to help and enjoy the process of creating a strong, durable roof that homeowners can depend on. For people who aren’t building an addition, Murakami Roofing offers a free roof inspection. It has been in the business for three generations — so their experience is gold. Professional roof estimators have infinite patience with every customer and will go through the estimate line by line until every question is answered. Experience, trust and reliability is the Murakami Roofing standard and practice.

45-558 Kamehameha Hwy. Ste. C-18, Kaneohe