Maximum Pitch For Slate Roof

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.

Maximum pitch for slate roof.

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. Generally a slate roof is not installed on a pitch less than 4 12. Our suggestion is not to contemplate using slates on roofs with a pitch less than 20 degrees and then only for big format slates eg 500x300mm. What is the maximum roof pitch for a roof tile.

Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more. Roof tiles and slates are very versatile products and can be used on a variety of roof pitches. 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.

It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more. 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.