Tile Roof Slope Minimum

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

Tile roof slope minimum.

In traditional home construction it was not recommended to have a roof pitch lower than 20. To avoid this use wind clips on each tile along with a construction grade silicone sealant or other approved sealant. However with modern roofing materials such as boral roofing tiles the minimum roof pitch can be as low as 15. 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.

Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Sunday july 1 2018 the international residential code irc specifies a minimum 4 12 pitch 4 inches of vertical rise for every 12 inches of horizontal run for a clay or concrete tile roof except that a pitch as low as 2 1 2 12 is allowed when two layers of underlayment are applied. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.

Roofing material or system. Slopes 4 12 or greater which are considered high pitch need only one layer of underlayment. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Determine the minimum slope of the roof based on the roofing material. These linings are applied starting at and parallel to the eaves in 36 inch wide strips with a 19 inch overlap for successive sheets.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. In general there is no maximum slope for tile roofs. Minimum required roof slope for roofing materials. 9 46 built up roof asphalt.

Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. Asphalt shingles continue to be the most widely installed roof covering option in north america. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater. Metal roof shingles require a minimum roof pitch of 3 12 or greater.

What is the minimum slope for a clay or concrete tile roof.