Click here to download CORODEK® PDF Click here to download CORODEK® Technical Specs PDF Enquire About CORODEK® Now For roofs with continuous sheets and no end laps the minimum roof pitch is 5° (1 in 12). For roofs with pitches between 5° and 15° the minimum end lap length is 200mm and for pitches above 15° it is 150mm. For walls allow minimum end lap of 100mm.