Soakaway - Crate or gravel

franky · Post: # 95995Post **franky** Wed Mar 05, 2014 11:35 am

digging out for crates and come across shale at 800mm just wondering if I should stop digging and back fill with 10mm gravel,continue down to put in crates, or even put in crates at this level without gravel underneath. it is for gutter from 1 side of 2 bed bungalow 65 sq meteres overall.

Wed Mar 05, 2014 12:56 pm

Conduct a permeability test there are instruction on the main page

Then let us know the results

franky · Post: # 95999Post **franky** Wed Mar 05, 2014 1:35 pm

will do.

franky · Post: # 96000Post **franky** Wed Mar 05, 2014 2:10 pm

dug 300 by 300 hole and filled with water twice - drained in 2-3 mins first time and 3-4 mins second time

dig dug dan · Post: # 96002Post **dig dug dan** Wed Mar 05, 2014 6:23 pm

Stop digging. Thats a good soakaway!

Post: # 96004Post **Tony McC** Wed Mar 05, 2014 6:30 pm

As long as you have sufficient depth for your build-up, then you have a free-of-charge soakaway as provided by Mother Earth!

You could squeeze in one of those 150mm deep 'Permavoid' crates just to give guaranteed storage/attenuation, if you wanted to be doubly sure.

franky · Post: # 96009Post **franky** Wed Mar 05, 2014 9:10 pm

many thanks for your responses - could you please just explain "sufficient depth for build-up".

Post: # 96014Post **Dave_L** Thu Mar 06, 2014 6:03 am

Sufficient soakaway capacity for prolonged storm conditions.

franky · Post: # 96016Post **franky** Thu Mar 06, 2014 9:51 am

thanks - would it be any use to join on a further section of 110mm to outlet, perforated with slits, to disperse water across top of soakaway area rather than let in all fall into one spot? and should I put down geotex to separate shale level from other sub/top soil.

Post: # 96055Post **seanandruby** Sat Mar 08, 2014 9:47 am

Yes put in a seperation membrane ,Terren. also use rigid pipe to your storm crate, as has been stated 'you have a free soakaway' so take advantage of it.

franky · Post: # 96058Post **franky** Sat Mar 08, 2014 10:33 am

thank you - after thinking thing through a bit more I realised that if I did what Tony suggested and put in permavoid unit(s) I would have dispersal/infiltration sorted - trying to find out price/supplier.

Post: # 96084Post **Tony McC** Sun Mar 09, 2014 1:30 pm

I was speaking with the current Mr Permavoid at EcoBuild on Thursday - due to the continual game of Musical Jobs at Agg Industries, he may have been moved to another role by now, but he was definitely in charge of it all on Thursday - and they are allegedly making a big push with Permavoid via their preferred Builders' Merchants, which I think is Keyline and Burdens.

Edited By Tony McC on 1394371862