20mm to 70mm is a fairly usual grade of rubble ie nowt too small or big .
clean graded hardcore ,ie no plaster or mortar and screened to remove the wee bits is among the cheapest suitable stuff but depending what is available locally bargains can be had .
try to avoid new aggregate as it has an extra "quarry tax" on it .
a quick call to building control should get your local approved materials list as different areas have local preferences.
iirc geotex was favourite a while back in the london area
even more techy stuff but this linky has a lot of useful design info.
ppppp
iirc across a slope works better than down a slope where it might puddle at the low end but i think that sort of stuff is in the recent linky.
In this case down the slope is better. It will then join to the existing french drain further down. By that point hopefully enough has soaked away to not puddle. If it does then I just repeat the exercise of remaking the french drain down from that and if I have to go far enough then it will eventually reach the ditch at the field edge and join the natural drainage channels.
gregotyn
Joined: 24 Jun 2010 Posts: 2201 Location: Llanfyllin area
Posted: Fri Jul 22, 16 1:17 pm Post subject:
Give me a clue what area you are in as I have a friend who wants to loose some rubble/stone and so you could probably be selective, by taking some and if you have a long enough trench all of the hardcore. He is sited in the Llanfyllin area by Welshpool, Powys. I haven't told him yet!
Give me a clue what area you are in as I have a friend who wants to loose some rubble/stone and so you could probably be selective, by taking some and if you have a long enough trench all of the hardcore. He is sited in the Llanfyllin area by Welshpool, Powys. I haven't told him yet!
Thanks for the offer but Wales is too far away as I'm in Sussex. Though it seems appropriate to be offered rubble from Llandfyllin (yes I know the 'd' shouldn't be there but the pun works better with it)
Last edited by Jb on Sat Jul 23, 16 7:52 pm; edited 1 time in total
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