Calculating The Amount Of Aluminium Roofing Sheet For A Building

You have read the calculating the amounts of block to be used for a building from plan, it will interest you how simple maths can help you safe you from unnecessary stress. Today, I have simple another interesting to calculate the amount of aluminium roofing sheet from the building plan. This will help you to predetermined and know the estimate cost that the roofing will require for our builders. The cost is estimate, and never met to be EXACT, since wastage and the roofing technicality might cost little waste on the part of carpernters


Refer to old articles of aluminium roofing sheets, they come in rolls of average of 600mm to 1300mm depends on the manufacture and specifications. As stated in previous articles, the aluminium sheets comes in rolls at the factory just like toilet rolls but with different widths and thickness based on specifications.

Calculating the roof required could be done by calculating the surface area in square meters of the area covered by the aluminium and for some companies it could be calculated in meter lengths ,knowing the width which is 600mm above as constant.
For a simple gable roof as shown in pic 1 with length of 25.2m. First you must know the height of roof from the section.
For this sample we  are taken the eight to be 3meters (10 feet)to know the length of leaf “x” or “y”
Gable Roof
Gable Roof
section of roof
Remember the pythagoras theorem
x2=32 +6.12
x=6.8m
Hence the  area  of  roof  is (6.8  i.e  x)+6.8  i.e y) multiply  by  length  25.2m=342.72m2
If  the width of the roof comes  in 600mm or 0.6m, the  length of  the roof   require will be  342.72/0.6m
=571.2 meters length
So for some companies they could give their quotations in meter length so just ask for the width of the rols and follow steps above.
hip roof plan fig 3
For a complex roof like pic 3 above, then you can  opt to do a fast estimate  based on the linear area covered as shown by roof plan as it may be a bit complex and difficult, so you can divide the roof plan to sections of rectangles or squares as it may applies –(four right angles). Then add  the areas together and add 10% of the same area, because the higher the  roof, the more the plates , and the  more complex the roof the higher the numbers of offcuts which will also increase the numbers of aluminium /plates required . So for pic 3 ,add areas of rectangles A,B,C and D which is the big center.
i.e (8.2m x 1.2m)+(1.2mx8.2m)+(1.2mx8.2m)+(22.8mx12.2m)=311.28m2
Add 10%=311.28+31.128=342m2
Now  for a more accurate and scientific calculation, you must know the height of the roof , have the basic knowledge of calculating area of a triangle  which is ½ base x height . And Pythagoras theorem to know the  side of any triangle . Also remember the area for a rectangle is simply length multiplied by breadth.
Assuming the height of roof is 3meters as as previous in fig. 2, and taken the   major part  D as a simple  gable roof  (check the different sections on plan fig 3) and ignoring the hipped or bevelled section.
section of roof
x2=32 +6.12
x=6.8m
So area of roof as previous is ( 6.8m+6.8m) multiply by length 22.8m=310m2
Add areas A,B,C
+310m2  +9.84m2 +13.44m2 + 9.84m2
=343.12m2
With your estimate is also the RIDGE and GUTTERS.
Ridge is the roof material 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 .
And 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.

Michael Ekundayo is the Chairman of Cloud Builders Nigeria; a growing firm for home, school, hostels and hotels, mosque and church building in Africa, office is in Ilorin, Kwara state.

http://www.cloudbuildersnigeria.com/2014/09/calculating-amount-of-aluminium-roofing-for-a-building.html

Posted: at 13-09-2014 09:13 AM (9 years ago) | Newbie

When it comes to building a new structure or renovating an existing one, one important material that often comes into consideration is aluminium roofing sheets. These lightweight and durable sheets are known for their ability to withstand various weather conditions while providing an aesthetic appeal to any building. However, a common question that arises is how to calculate the amount of aluminium roofing krcaluprofiles.com sheets required for a specific project. In this blog post, we will explore various factors and considerations that can help you determine the exact quantity of aluminium roofing sheets needed for your building project. So, if you're looking for guidance on this topic, keep reading to find out more!

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Posted: at 20-07-2023 01:50 PM (9 months ago) | Newbie