The irc recommends a minimum pitch of 2 5 12 for these materials.
Minimum pitch for slate roof tiles.
Weight of slates kg area of roof m 2 slate.
The total weight of slates on roof can be found from the formula.
Ratios from that minimum up to 4 12 which are considered low pitch require double underlayment.
And our brand new mendip 12 5 can be used at an even lower pitch of 12 5 restrictions on rafter length may apply.
What is the minimum pitch for a slate roof.
All tiles and slates have a minimum roof pitch which is set out in order to protect the roof from water penetration.
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.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
Fixing tile roofs in cyclonic regions 15 minimum roof pitch 15 maximum rafter lengths 15 maximum rafter lengths no sarking 15 sarking 16 insulation 16 ventilation 16 performance characteristics 17 thermal performance 18 acoustic performance 18 water collection 18 testing.
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.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
When designing or altering the pitch of a slate roof common weather conditions should be one of the first considerations.
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 12 5 depending on the design of the roof.
As 2050 installation of roof tiles 20.
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.
What are the minimum pitches for clay or concrete tiles.
Sandtoft double pantile concrete tile.
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.
Clay tiles are colorfast which means their tints improve rather than fade over time.
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.
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.
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.
Concrete is long lasting with a minimum lifespan of 50 years depending on climate.
As 2049 roof tiles 20 testing.
