Slate Tile Roof Pitch

The rise and the length.

Slate tile roof pitch. In areas with high winds the underlayment must be attached with corrosion resistant fasteners according to manufacturer s instructions. Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more. Additionally if the climate can cause backups of water as ice under the eaves the tile requires at least two layers of underlayment cemented together. For tile shingle slate and metal roofing.

Slate tile requires a pitch of 4 12 or greater. 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. Most commonly a roof pitch will be from 0 flat to 12 45. Generally speaking 20 degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions.

When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. 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. Roof pitch is a term used in the roofing industry to describe the angle slope of a roofing structure.