Minimum Slope For Roof Tiles

Clay tiles are colorfast which means their tints improve rather than fade over time.

Minimum slope for roof tiles.

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. Metal roof panels minimum roof slope roof pitch r905 10 2. Clay tile roof slope sheathing underlayment specifications include defining thte roof slope requirements for clay tile roofs and roof sheathing requirements for clay tile roofs and also clay tile roof underlayment requirements. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical.

The irc recommends a minimum pitch of 2 5 12 for these materials. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.

Concrete is long lasting with a minimum lifespan of 50 years depending on climate. Asphalt shingles continue to be the most widely installed roof covering option in north america. Minimum requirements are nominal 1 inch for board sheathing or 15 32 for plywood and other approved panel. 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.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.