Slate Roof Pitch Change

It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5.

Slate roof pitch change. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. You consider some alternative solutions. The slope of a roof is often referred to as the roof s pitch. Following the successful test results we are happy to advise specifiers and contractors that they can choose a siga natural slate roof as low as 15 degrees sheltered or moderate exposure and 17 5 degrees severe exposure if the slates are hook fixed with a 150mm lap.

As per the nrca roofing and waterproofing manual fifth edition they recommend that roof deck slopes intended for the application of steep slope materials at 4 12 18 degrees or greater page 405. It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more. Conclusions of the low pitch slate roof testing. This autocad detail can be used in your roof design cad drawings.

Even a slight change in pitch can have a variety of consequences depending on the roof. When a roof s ridges walls and rafters are switched out there is a chance to create a new architectural design that can change the pitch of the roof. A dramatic change in pitch will affect the way the roof looks the way water runs off of it and much more.