Minimum Pitch For Slate Roof Ireland

In general terms the minimum pitch is 22 5 degrees but we have seen pitched roofs perform down to 15 degrees pitch.

Minimum pitch for slate roof ireland.

Each roof has to be assessed individually. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Minimum recommended headlaps roofing the recommendations for minimum pitches and laps for slate tiles apply to normal situations. The min pitch for slating was changed from 22 5 to 25 in 2002.

Confirm the exposure level of the site using our annual driving rain index map. What are the minimum pitches for clay or concrete tiles. 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. If it is severe very severe a minimum 17 5 pitch is recommended.

Set out key steps if you want to use a low pitch slate roof. 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. 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 following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Steps to specifying a low pitch slate roof. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. The answer depends on a number of factors such as height rafter length site location slate or tile being used etc.

Some roof tiles for example are only effective above 25 degrees while others work well below 20 degrees. And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply. 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.

This came about due to the revisions in the code of practice. 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. 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. In general the recommendations apply to rafter lengths of not more than 9m in driving rain exposures of less than 56l m2 per spell and 6m in driving rain exposures greater than 56 l m2 per spell.