The minimum roof slope allowed by code for any type of roof is in 12 applicable only to.
Tile roof pitch minimum.
Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater.
This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units.
Concrete is long lasting with a minimum lifespan of 50 years depending on climate.
Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.
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.
Clay and concrete tile minimum roof slope roof pitch r905 3 2.
3 1kg mass per sq m.
The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.
There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12.
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.
Mass nominal mass per tile.
However it is regrettable that many installers usually ignore this requirement due to the desire for a quick installation process.
The irc recommends a minimum pitch of 2 5 12 for these materials.
Set out nominal batten spacing.
337mm min 362mm max it is good tiling practice to check the gauge of all kiln fired clay roof tiles at the site.
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.
Although the minimum roof pitch for residential homes may vary depending on city and state building codes.
Minimum roof pitch15 with sarking and 20 without sarking.
Clay tiles are colorfast which means their tints improve rather than fade over time.
To avoid this use wind clips on each tile along with a construction grade silicone sealant or other approved sealant.
However on extremely steep roofs above 19 12 or on vertical applications wind currents may cause tiles to rattle.
In general there is no maximum slope for tile roofs.
So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum.
