I'm about to lay a patio, and am unsure of the hardcore thickness and how to work out the amount of sand/cement needed. the area of the patio is approx 3m X 4.5m...all help gratefully received.
Also is it advisable to use Breeze block for a retaining wall or should I stick with bricks?
Also is it advisable to use Breeze block for a retaining wall or should I stick with bricks?