My garden measures approx 15m long X 9m at it's widest and 6m wide further up the garden due to my garage. I'm fitting land drainage pipes soon but wondered if I need 100mm pipe for the main run and 80mm for side runs or can I use 80mm all round?
Also does anyone know why the geotextile pavemas 95 needs to be covered within 24hrs of laying?
Thanks for advice
Steve