Minimum Roof Pitch For Concrete Tiles

All tiles have a minimum roof pitch which is always stated in the manufacturers technical information.

Minimum roof pitch for concrete tiles.

In support of design possibilities and to ensure maximum penetration protection the best roof tile to use on minimum pitch roofs is a boral roof tile. However paying attention to this is absolutely crucial as laying a roof below the recommended minimum pitch is likely to lead to the underlay being exposed to rain and water. 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.

The minimum fixing specifications given in this document is intended to assist the specifier and roof tiler in southern africa to determine the minimum recommended installation and tile fixing specification for each terrain category basic design wind speed building type roof pitch building height length of roof. The irc recommends a minimum pitch of 2 5 12 for these materials. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. There are a number of products on the market that are suitable for low pitch roofs.

Options available from marley include clay and concrete tiles and cedar shingles and shakes. This minimum pitch is important if tiles are laid below the recommended minimum pitch there is an increased chance of water getting through which can damage the underlay and battens over a prolonged period. Aesthetically boral concrete and terracotta roof tiles are. 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 following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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. Of course the minimum pitch will depend on each type of roof tile specifically on its design and materials. 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. Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment. The manufacturer will supply all the technical information regarding the pitch of the concrete tile you have purchased. There are a number of reasons why boral roof tiles are the best to use on minimum pitch roofs.

Clay tiles are colorfast which means their tints improve rather than fade over time. Best roof tiles for low pitch roofs.