https://sandbox.zenodo.org/communities/staydryroof/records?q=&l=list&p=1&s=10&sort=newest">https://sandbox.zenodo.org/communities/staydryroof/records?q=&l=list&p=1&s=10&sort=newest. A high quality roofing will have them https://janicecyuv020586.onesmablog.com/the-smart-trick-of-stay-dry-roofing-that-nobody-is-talking-about-80609299