Roofing Materials: How to Calculate Roofing Sheets (Mabati ) Needed

Roofing Materials: How to Calculate Roofing Sheets (Mabati ) Needed

Roofing Materials: How to Calculate Roofing Sheets (Mabati ) Needed

Roofing Materials: How to Calculate Roofing Sheets (Mabati)  needed

Knowing how to estimate roofing materials is important. Not only will it help eliminate waste, but it will also ensure that you buy just enough for the project. Below we  show you how to estimate roofing materials for your next project.

Also Check >>How To Save Money When Building A House

roofing materials

Find the area in  square metres of the roof.

Roofing Materials

To get an approximate surface area, we will  need to multiply the length and width of the house.

Roofing Materials

Area =length of front of house x width of house

So let’s say for a house of total length of the front is 11.4m and side which is the longer part is 4.6m  and a side extension of 2.96 M  by 3.8M

Roofing Materials

The calculations are captured below

Roofing Materials

As indicated, we add an arbitrary value as a safety factor for the difference in length due to the pitch or depth of roof or roof rise.

Add allowance for the pitch or depth or roof rise, say 30% of Area

The Area will be : (11.4 X 4.6)m2+ (3.8X 2.96)m2   X 1.3 (30%)=82.8m2.

Also Check>>Best Mabati Companies in Kenya Here

How to calculate the number of Iron Sheets

Now find out the length and breadth of each roofing sheet and also multiply length by breadth. Assuming the ceiling sheet is 3 m in length and 1m in breadth,

Then area of roofing sheet =3 x 1 = 3m2

Therefore total numbers of roofing sheets needed approximately is
(Area of building + Allowance)/area of one roofing sheet

=82.8/3m = 28 Mabati Sheets

Please note that this is not a standard way of approximating but this is derived based on site experience. In any case there is no particular standard way.

With your estimate is also the Ridges, Valleys and Gutters.

Roofing Materials

Ridges and Valleys  are the roof materials you use that will cover and seal up the points where two leaves of your aluminium sheets meet to protect the interior from rain, it usually overlaps the two adjacent leaves of roofing sheets .
Roofing Materials
A gutter is usually underneath, it gathers rainfall and help to channel it to wherever deem fits according to design. Is at the taper ends of two adjacent leaves of aluminium sheets to collect water.

The difference between gutter and ridge . While the ridge is up protecting rain water the gutter is down collecting rain water and channeling to some drains.

Also Check >>How To Save Money When Building A House

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