Maximum Roof Pitch For Slate

Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Maximum roof pitch for slate.

Degrees to pitch rise in run table. Recommended not less than 4 12 pitch. It is agreed that the roof pitch should be a minimum of 20 degrees preferably a bit more. 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.

With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. Generally a slate roof is not installed on a pitch less than 4 12. 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.

What is the maximum roof pitch for a roof tile. 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. Roof pitch multiplier table. Also would advise in western nc to install ice water guard in place of standard underlayment.

The slope of a roof is often referred to as the roof s pitch. Minimum roof pitch for shingles. Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more. 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.

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. Roof slope equivalents as rise. Roof tiles and slates are very versatile products and can be used on a variety of roof pitches. 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.