**Contents**show

## How many slates does the average roof have?

The general rule of thumb – and for this example we’ll use the most common size of 500×250 or “20×10” – is for every 1 meter squared of roof, you need 21 slates.

## How many slates does a m2 roof have?

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.

## How do I work out how many slates I need for my roof?

Slate & Half Slates

As a guide, a slate of 500 x 250 sizes uses a slate and half of 500 x 375. You would need 2.5 of these slate per linear metre. Therefore, if your rafter length was 4 linear meters, your calculation would be 4 x 2.5 = 10 Quantity slate & Half’s.

## What size is a standard roof slate?

Slate roof tiles can range in size from 12” (length) x 6” (wide) up to 24” (length) x 12” (wide).

## How many slates are there?

How many slates per square metre (m2)?

Quantity of Slates | ||
---|---|---|

Slate Size | Lap mm | |

600 x 300 | 12.1 | 14.5 |

500 x 300 | 14.8 | 18.5 |

500 x 250 | 17.8 | 22.2 |

## How many slates does a pallet of roof have?

Cafersa LV11 Natural Spanish Roof Slate 500mm x 250mm (Pallet of 600)

## How many slates can a roofer lay in a day?

An average roofer can lay 30 tiles an hour, which, therefore, equates to 3m2. Plain tiles can be laid by a roofer at the rate of 80 per hour. But that amount of tiles only covers 1.3m2, so there’s considerably more work involved in covering a plain tile roof.

## How many tiles fit in a square metre?

This is a common question and ultimately this depends on the size of the tile. A 150 x 150mm will give you approximately 44 tiles to a square metre, but a 600 x 600mm tile will give you 2.8 tiles per square metre.

## How much should slates overlap?

On a slate roof this is the critical overlap and is necessary to prevent water penetration and leakage. The roof pitch typically relates to the required head lap as follows: 20 degrees: 115 mm minimum head lap. 25 degrees: 85 mm.

## 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.

## How many tiles do I need for roof?

Take the roof width and multiply it by the slope height. This calculation will give you half the roof area, so then simply multiply by 2 to give you the area of both sides. You now have the area of your roof in square metres.

## How do you calculate the area of a roof?

To find your roof’s total square footage:

- Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
- Add the square footage of each of the planes together.

## How do you size slates?

When considering the right size of slate for your project the following rules of thumb apply:

- Bigger slates are more aesthetically pleasing on larger roofs.
- Wider slates work well in areas of high rainfall.
- Smaller slates are useful for complicated roofs with lots features like hips, valleys, dormers.

## What are the best roof slates?

Welsh slate is considered by many as the best natural slate in the world. Welsh slate is available in either heather (purple) or blue-grey. Penrhyn slate has a beautiful soft blue/purple appearance and can be expected to last more than 100 years.

## How much does a piece of slate cost?

Slate tiles themselves can run anywhere from $4 to $28 per square foot, but most cost between $4 and $10 per square foot.