Natural Slate Roof Pitch

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.

Natural slate roof pitch.

In addition below a 30º degree pitch the hooks should have crimped shanks to reduce the capillary rise of water at the perpendicular joints between slates. 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. 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. Weight of slates kg area of roof m 2 slate.

How easy is natural slate to install. A welsh slate roof adds character and quality to any building. The slate coverage per m2 can be found from table 2 23 9. Conclusions of the low pitch slate roof testing.

The roof pitch should be at least 20 which is influenced by the length head lap and thickness of the slate. 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. 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. 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.

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. Welsh slate combines beautifully with traditional and modern materials and provides the designer with a choice of colours and a natural distinctive texture. The total weight of slates on roof can be found from the formula. 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.

Proven longevity welsh slate has hundreds of years of history and has proven to be the highest. If you are looking for a roofing solution which involves a low pitch complex roof you have come to the right place. An alternative method of fixing slates is the use of slate hooks. 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.

However hooks should not be used below a 25º roof pitch. Installing natural slate is a more specialist job than most other kinds of roof.