They have also been certified as excellent for bes 6001 which means that projects using these products can now achieve extra credits under breeam and hqm as well as an a rating in bre green guide.
Marley concrete roof tiles minimum pitch.
Previously it was accepted that 35 was the lowest recommended pitch for both concrete and clay variants of the tile.
The new mendip 12 5 concrete interlocking tile can perform at low pitches which makes it ideal for one storey extensions and refurbishments.
With the introduction of machine made clay tiles this has now dropped slightly to 30 similar to the marley hawkins single camber tile.
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The minimum fixing specifications given in this document is intended to assist the specifier and roof tiler in southern africa to determine the minimum recommended installation and tile fixing specification for each terrain category basic design wind speed building type roof pitch building height length of roof.
Nominal weight of roof tile fittings.
And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply.
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12 5 44 pitch with a rafter length up to 6m will require a 100mm headlap all of our concrete interlocking tiles can achieve an a rating which has the lowest environmental impact in the building research establishment s green guide to specification.
Our concrete interlocking roof tiles and concrete plain tiles are easy to lay thus ensuring you can keep your installation costs down.
Double lap fibre cement slates where the roof slope exceeds 6 metres in length severe very severe exposure and 9 metres in length sheltered moderate exposure.
This popular option can be used on roofs as low as 15 and because it is specifically designed to shed water efficiently from its surface it is a good choice for a low pitched roof.
The minimum pitch for each product can be found in the table below and in the product brochure or within the products pages some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch.
For example the marley wessex concrete tile offers great flexibility as a demonstration of a low pitch roof tile.
Interlocking tiles and slates where the roof slope exceeds 6 metres in length and or the site is rated to be in a severe exposure category.