Slate Roof Pitch Change

A dramatic change in pitch will affect the way the roof looks the way water runs off of it and much more.

Slate roof pitch change.

A couple of likely slate suppliers are consulted and they confirm that they are happy to supply 600x300mm slates for a minimum roof pitch of 20 degrees assuming a minimum lap of 125mm. 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. Conclusions of the low pitch slate roof testing.

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. 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. Download this free 2d cad block of a typical slate change of roof pitch detail including annotations and dimensions. Generally a slate roof is not installed on a pitch less than 4 12.

Even a slight change in pitch can have a variety of consequences depending on the roof. This autocad detail can be used in your roof design cad drawings. It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more.