Screw Location Recommendations
https://mill-wiki.win/index.php/Can_You_Put_a_Metal_Roofing_System_Over_a_Shingle_Roof%3F
We have a 1890's residence with a combination Mansard design roof covering and also conventional sloped roof. We are going with a combination roof (Malarkey Windsor Roofing Shingles on Mansard as well as standing