Natural Slate Roof Pitch

Unlike most other roofing materials and even slate from other quarries where sizes larger than 50 25 cannot be achieved ssq slate allows you to design roofs as low as 17 5 in pitch.

Natural slate roof pitch.

Slate is a natural material with unmatched technical features which lasts over 100 years. Installing natural slate is a more specialist job than most other kinds of roof. If you are looking for a roofing solution which involves a low pitch complex roof you have come to the right place. Following the successful test results we are happy to advise specifiers and contractors that they can choose a siga natural slate roof as low as 15 degrees sheltered or moderate exposure and 17 5 degrees severe exposure if the slates are hook fixed with a 150mm lap.

A welsh slate roof adds character and quality to any building. 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. Proven longevity welsh slate has hundreds of years of history and has proven to be the highest. Where the thickness of natural slates reduces their pitch by 3 or more select the next lower rafter pitch to determine the recommended head lap and slate width.

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. At burton roofing merchants we stock a wide range of cupa pizarras natural slate roofing tiles that are perfect for repairing your existing roof or installing a new sloping roof. How easy is natural slate to install. The minimum roof pitch for natural slates is 20 degrees bs 5534 2014 page 45 depending on size of slate see table above bs 5534 2014 page 45 table 9.

The total weight of slates on roof can be found from the formula. Welsh slate combines beautifully with traditional and modern materials and provides the designer with a choice of colours and a natural distinctive texture. Weight of slates kg area of roof m 2 slate. Roof pitch 40 roof area m 2 150 length of roof slope m 9 5 the headlap can be found from table 1 by reference to slate size roof pitch and exposure 65 mm.

The minimum recommended pitch for natural slate is 25 although this can be lowered down to 20 with products like the siga 56m natural slate and is also dependent on slate size. What is the minimum pitch for natural slate. Slates 450mm long or less should not be used at pitches of 27 5 degrees or less moderate severe exposure bs 5534 2014 page 45. Conclusions of the low pitch slate roof testing.

An alternative method of fixing slates is the use of slate hooks. The roof pitch should be at least 20 which is influenced by the length head lap and thickness of the slate.