how to build a brick leaf off 150mm thick block wall

To work out your brick quantities Divide your overall length by the length of the brick you want +10mm for perp and the height, divide by the height of the brick plus bed joint then x2 as you want a solid 9 inch wall always allow 10% over for wastage some brick types are more like 30% wastage if you are picky over the bricks you use Tom Century Brickwork

Some simple figures for you.... Standard brick size (metric) 215mm x 65mm x 100mm or 225mm x 75mm x 100mm including joints. For quantities its best to use m2. Find your m2 by using the formula L (length) X H (height) =m2 Then times that by 60 as there are 60 bricks per m2 For instance 4m long X 2m high = 8m2 8 x 60 = 480 bricks If the wall is to be double skinned then just times your final number again by 2. Hope this helps