Minimum Pitch For Slate Roof Ireland

Some roof tiles for example are only effective above 25 degrees while others work well below 20 degrees.

Minimum pitch for slate roof ireland.

In the past slates were thought to be effective at 22 5 degrees and this was set as the minimum acceptable pitch. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. For a 15 pitch the exposure level of site must be sheltered or moderate.

Our melodie interlocking clay pantile can be used in roof pitches as low as a 12 5 our wessex and mendip concrete roof tiles can be used down to a minimum 15 pitch. Set out key steps if you want to use a low pitch slate roof. Minimum pitch for slate roof when considering the minimum pitch for a slated roof it is necessary to establish the exposure of the site the length of rafter and the height of the building. Minimum recommended headlaps roofing the recommendations for minimum pitches and laps for slate tiles apply to normal situations.

And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. In general terms the minimum pitch is 22 5 degrees but we have seen pitched roofs perform down to 15 degrees pitch. The roof finish manufacturer will specify the minimum and maximum pitch required to ensure weatherproofing.

The answer depends on a number of factors such as height rafter length site location slate or tile being used etc. Sig roofing can supply a number of solutions to cope with these lower pitches such as cambrian roof slate or regent tiles which can be used on pitches as low as. Minimum roof pitch for shingles. Typically roof pitches in ireland are in the 30 to 40 degree range to repel the rain quickly from a slate or tile covering and provide some degree of practical attic space for storage.

Confirm the exposure level of the site using our annual driving rain index map. The recommendations shown above are based on a maximum height to eave of 12m and a maximum rafter length of 9m in moderate exposure and 6m in severe exposure. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 12 5 depending on the design of the roof. This came about due to the revisions in the code of practice.

Each roof has to be assessed individually. What are the minimum pitches for clay or concrete tiles. The min pitch for slating was changed from 22 5 to 25 in 2002. Steps to specifying a low pitch slate roof.