Moggaman Posted October 17, 2020 Share Posted October 17, 2020 Hi. wondering if a 30 degree pitched A roof with slates is ok ... obviously a 40 degree roof would be better but I have a definite ridge height that I have to work to. I know structurally it is fine ... I am wondering more so about wind driven rain? thanks Moggaman Link to comment Share on other sites More sharing options...
epsilonGreedy Posted October 17, 2020 Share Posted October 17, 2020 My new build has a 30 degree slate roof specified, it must be legit otherwise my experienced building control inspector would have flagged this from the outset. You need to research how your location is rated for weather exposure. Depending on the degree of exposure the slate overlap can be increased to compensate. There are reference tables online that provide a simple formulaic answer to how much overlap is needed. Link to comment Share on other sites More sharing options...
Reiver Posted October 17, 2020 Share Posted October 17, 2020 A local roofer once told me that 30 degrees was the minimum - but we do have plenty of wind and rain round here! Link to comment Share on other sites More sharing options...
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