How many battens do I need for a slate roof?
In most cases, irrespective of rafter spacings, 50 x 25mm battens should be used for our standard preholed fibre cement slates. Where BS 5534 suggests 38 x 25mm battens are acceptable, the slates should only be laid with 100 or 110mm lap.
How do you work out Batten spacing for slates?
Measure between the top of the top batten and the top of the lower batten and this divide this measurement by the manufacture’s ‘gauge’ – this will give the number of slates/tiles rows need to cover the roof. This number is very unlikely to be a whole number, so round the number up to the next whole number.
How do you calculate batten roofing?
Multiply the number of rows in each section of the roof by the length of the eaves for that specific section. This will give you the total length of battens needed for each side of the roof.
How do you calculate roof slates?
The amount of slates you need per square metre (m2) depends on which slate size you’re using. For example, if you’re using a 20×10 slate (500mmx250mm), you will require 21 slate per m2. A 24×12 slate (600mmx300mm) demands only 13 slate per m2.
What size is slate batten?
For natural double lap slates (sized or random), the minimum width is 50mm and depth 25mm, for a span of up to 600mm. For natural double lap slates (fibre cement or concrete), the minimum width is 38mm and depth 25mm, for a span of up to 450mm; and 50mm width, 25mm depth for a span of up to 600mm.
What size should battens be?
A true batten is 2-inches in width or smaller, but you can use larger widths by installing trim in place of a batten if you want a thicker appearance. They’re installed directly over the vertical panels to get the traditional look.
How do you measure batten spacing?
Add 1 to your number of spaces to get the number of battens on the wall. Now multiply your batten width by the number of battens. Subtract that number from your total wall length. Divide that number by the number of spaces you calculated earlier, and THAT number will be your exact spacing between each batten.
How is batten quantity calculated?
Multiply the number of rows on each section by the length of the eave of that section. This gives you the total length of battens needed for each section.
What is the minimum pitch for a slate roof?
Natural Slate: The general recommendation for the minimum pitch for natural slate is 25°. 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.
What is Batten gauge?
Batten gauge = (length of slate-headlap)/2.
How do you measure Batten for slate roofing?
Batten and Holing Gauges for Natural Slate It also allows you to determine the holing gauge (distance from hole to tail of slate) and the number of linear metres of batten per m2 of roof. Batten gauge = (length of slate-headlap)/2. Holing gauge = batten gauge + headlap + 10mm.
How do you calculate the holing gauge of a slate roof?
It also allows you to determine the holing gauge (distance from hole to tail of slate) and the number of linear metres of batten per m 2 of roof. Batten gauge = (length of slate-headlap)/2. Holing gauge = batten gauge + headlap + 10mm.
What size slate do I need for a slate roof?
Holing gauge = batten gauge + headlap + 10mm. The most commonly used slate size in Southern England is 500x250mm and 400x250mm in Scotland and the North of England.
How do you calculate Batten gauge?
Batten gauge = (length of slate-headlap)/2. The holing gauge can be calculated as Holing gauge = batten gauge + headlap + 10mm. The most commonly used slate size in Southern England is 500x250mm and 400x250mm in Scotland and the North of England.