Joined: July 2004
||Posted: 28 July 2017,13:26
Based on average usage, we used to calculate 8m² per 25kg for 80mm blocks and 10m² per bag for 60mm blocks. Cuts always take more, so narrow paths with lots of cut edges and little in the way of uncut joints would gobble up the KDS, while big expanses with minimal cutting would, obviously, give better coverage.
For 60m² of 50mm or 60mm blocks, Id bring 6 bags and expect to have some left over.....but given that joints need to be topped-up after 6 weeks or so, that surplus can be kept in the shed until needed.
And at less than 5 quid a bag, is it really worth buying less and hoping you'll have enough? A return trip to the BM or DIY shed will cost you a lot more than just a fiver!
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