Maximum Pitch For Slate Roof

11 august 2015 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.

Maximum pitch for slate roof.

Tiles or slates can be used at pitches up to 90 degrees vertical provided a clip is available to securely clip the tail of the tile available for most tiles. Generally a slate roof is not installed on a pitch less than 4 12. What is the maximum roof pitch for a roof tile. The slope of a roof is often referred to as the roof s pitch.

Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more. 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. Conventional low pitch slate roofs are recommended down to a minimum of 20 in areas of sheltered or moderate exposure providing a 500x300mm slate is used and a headlap of 115mm. 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. Roof tiles and slates are very versatile products and can be used on a variety of roof pitches.