Your roof is the first line of defense from water. It’s an important decision from design to what material to use. Tatsuya “Tats” Nakagawa, CEO of Castagra, a plant-based, sustainable, and VOC-free roof coating manufacturer, joins us to discuss roof coatings. He shares his insight on the material, complexities, considerations, and client relationship management in an evolving world.

Tats also hosts a weekly LinkedIn Livestream that features roofers, hosts the Specified Growth Podcast at, and co-authored a book on innovation success, Overcoming Inventoritis – Forward by Steve Wozniak, co-founder of Apple.

Thank you to our sponsors!


Twinmotion is a real-time rendering solution used by architecture, engineering, and construction professionals to create high-quality imagery, client presentations, and interactive experiences that help communicate your BIM data and design ideas, fast. Visit and try Twinmotion for free.

Section Cut by Monograpgh

On August 12, Monograph is hosting Section Cut, a virtual conference dedicated to firm owners and operation leaders. Hear from leaders at Lake|Flato, SOM, Workshop/APD, Colloqate, and more! Reserve a seat today by visiting

Show Music:

Intro – “Keep Calm and Chill” by Soundroll

Outro – “Backyard,” by Gregory David

If you enjoy our content, you can check out similar content from our fellow creators at Gābl Media.

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