Thanks for the reply. Yeah definitely a bigger job than I thought.
What about if I gradually raise the level with the underlay. Maybe 10mm now and 10 mm middle of…

dont think the last 3 pics worked... ill try again
http://imgur.com/KApHY5f
http://imgur.com/4evuA6m
http://imgur.com/uqKwaAf
the program wont let me rotate the pics for…

http://imgur.com/a/eWYTH
http://imgur.com/JStwUix
http://imgur.com/xXZmphg
http://imgur.com/agRB0l8
http://imgur.com/RbR9Tni
thanks again

Hi all. Im very new to this so hoping you guys can help me out. I've got problems with drainage down one side of back yard. Ill post link for…