Slate Roof Tiles Minimum Pitch

Slate tiles whether natural or synthetic are expensive but they can add value to a home because of their appearance.

Slate roof tiles minimum pitch.

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. Example slate type del carmen slate size mm mm 400 250 weight of slates kg 1000 1235 exposure moderate 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. 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. Roof slope equivalents as rise.

Degrees to pitch rise in run table. 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 general recommendation for the minimum pitch for natural slate is 25. The slate coverage per m2 can be found from table 2.

They last from 60 to 200 years with their main problems lying in the fastening material which can rust if made from corrosive substances. The total weight of slates on a roof can be calculated as follows. Slate tile requires a pitch of 4 12 or greater. Roof pitch multiplier table.

The minimum pitch for each product can be found in the table below and in the product brochure or within the products pages. We wanted a worry free beautiful best in class roof that could withstand future storms and we got it with our new davinci roof. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Conventional low pitch slate roofs are recommended down to a minimum of 20 in areas of sheltered or moderate exposure providing a 500x300mm slate is used and a headlap of 115mm.

There are some manufacturers that can go slightly lower such as the siga 56m natural slate which can go down to 20 in some instances if used with slate hook systems. All tiles and slates have a minimum roof pitch which is set out in order to protect the roof from water penetration. Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more. Some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch.

Complete list of roofing types.