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Posted: Sat Jun 20, 2015 4:15 pm
by deegan1979
seanandruby wrote:A geotextile like terram would normally go under the sub base, weed membrane goes under the turf, or if you have dog piss likely then the membrane goes under the bedding, otherwise you'll still get weeds showing through.
I'm not doing so well with this landscaping am I. Looks like I'll be laying more membrane then.
Is the one I've got ok or should I buy another mate?
Thanks by the way
Posted: Sat Jun 20, 2015 6:14 pm
by seanandruby
It looks fit for purpose as your pal got it with the package, water is penetrating, so go for it. You'll be ok, just read up a bit more and don't panic :;): 
Posted: Thu Jun 25, 2015 12:04 am
by r896neo
The surface tension of water make it sit on top of the fabric as if its not going through A bit like how when washing a sieve the water stays in the holes until you shake it out.
But if you actually put a hose on it you will see water will run right through. How freely depends on the grade.
It does seem like it doesnt though when you see water on top of it.
Science lesson over...
Posted: Wed Jul 01, 2015 9:40 am
by Dobber
Now I haven't tried this test but I have just installed 100m of land drainage and mistakenly used woven geotextile. It's backfilled now!
Any opinion as to whether this will work as I don't fancy ripping it all up to replace with non-woven.
D
Posted: Wed Jul 01, 2015 2:12 pm
by Tony McC
You should be OK. It's not as tough, so if this was a structural use it might need re-doing, but as its role is primarily filtration, it will probably cope.
Posted: Thu Jul 02, 2015 9:32 am
by Dobber
Tony,
Thanks for the swift reply. Theres no load on it so should be OK. I was more concerned over the permeability and whether it would hamper drainage.
Thanks again, great website. Should have read it more in detail before I started!
D
Posted: Wed Aug 12, 2015 9:29 pm
by mrpvs
I'm on with the same job currently , gotta cover 20 sqm at 6 inch depth with sub base mot , and a layer of sharp sand ,
planning on putting weed membrane over the sharp sand and watching how it all drains before laying the artificial grass .
my main area of concern is I've got clay under it all , so gonna have fun .
Out of curiosity I have dug in a frame 2 x 1 treated timber to peg the grass to , have you done the same ?
Posted: Wed Aug 19, 2015 1:51 pm
by Tony McC
Why are you putting a membrane over the sand?
Posted: Wed Aug 19, 2015 5:20 pm
by mrpvs
I've read a few artificial grass install blogs and it seems to be the done thing , prevents anything sprouting through the artificial grass , do you not think it needs it ?
Posted: Thu Aug 20, 2015 9:46 am
by Tony McC
I suppose it depends on the type of placky grass being used.
When I did my artificial lawn, I just laid the NamGrass straight onto the prepared grit sand screed. If the placky grass is a quality product, it shouldn't need a separate membrane directly beneath it. I'd be worried about any product that allowed weeds to go through it!
And even with a membrane, you *will* get little bits of real grass and weeds setting up camp at the edge of the placky grass, where it meets the adjacent surfaces. Nothing you can do about that, I'm afraid.
Posted: Thu Aug 20, 2015 5:02 pm
by mrpvs
I've got a bit of landscape fabric , I may put it down , not sure yet ,
it's half decent grass so hopefully nothing pops through , it may be a week or so until I get the grass down , so the membrane may be an idea to stop anything blowing onto the sand and rooting in . Thanks again .