Roof Tiles Lowest Pitch

To calculate roof pitch take the lowest point of the roof and measure the amount of rise for every 12 inches of horizontal movement toward the highest point.

Roof tiles lowest pitch. The minimum roof pitch is also subject to the standards set forth by the various building codes used in the respective regions. The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems. What is the minimum slope for an asphalt shingle roof. 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.

The chief reason for having a roof pitch is to redirect water and snow away from the roof and avoid any percolation that might result from stagnation of water on the roof. Low pitch roof slates. Forticrete centurion to my knowledge 10 is the absolute lowest you can achieve with a concrete tile and the forticrete centurion is the only one tested at this low pitch. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.

For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. 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. 4 12 to 20 12 pitches. The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

These tiles have been designed for roof pitches as low as 10 however any lower than this and you will have to consider using a flat roof type coating such as bitumen or epdm rubber. Asphalt shingles continue to be the most widely installed roof covering option in north america. All of the low pitch roof tiles offered in this range of products can be used down to 10 with anything less than 10 being considered a flat roof. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

For example a roof that rises 3 inches for every 12 inches has a pitch of 3 12. Importance of a roof pitch.