Renovating external render

[DavidFrancis]

Are you sure your arithmetic is right? Take your "front main section".  If the rectangular part of that is 3m wide and 2.4m high, that's 7.2 sq m.  Add 3.6 sq m for the triangular section and deduct 1.5 sq m for the window, then that's 9.3 sq m, not the 17 sq m you've got.

[Ed_MK]

You may be only right DF!
Lets see..
 

3m x 2.5 = 7.5m

Lets say the Top Triangle is roughly Quarter of its Square so 3x3 = 9m so lets call that safely 2.4m

And if we use the same "Fuzzy Maths" with the 3 dormas ..we could get 2x2 = 4 if it was square ...so lets say using the rough

Quarter rule again .... it was 1m...and then each "cheek" / side which you can't see is another 1m

So each Dorma you could say 3m for all sides

 

So 7.5 + 2.4 + (3*3)
7.5 + 2.4 + 9

18.9 tops ...RESULT

 

Well I'll sit in the corner face to the wall !!

and I went to bloody grammar school too! ..I dont know about being a high achiever ...All i ever learnt was nuns hit harder than men
and NEVER let yourself get caught alone with the P.E or R.E. teachers..or you may end up in some small cupboard helping them find 

the "lost key" ! (gulp) ....thank god i was Fat and Ugly !

 

On another note ...

I think I must have included the Side Cheeks for the main section (doh)