Mesh Castles

[Pete]

We to have a 100mm perforated land drain connected to it's own 1m3 soakaway. I actually think mine is a waste of time as the ground is so free draining the pipe does not do a great deal.

[LA3222]

16 hours ago, SoldierDog said:

One question. Did you also install a land drain? or not bother? and for what reasons either way.

 

They always seemed to be spec'd on the raft designs i've seen but dont actually seem to be that often installed looking at the examples on this site?

 

Thanks

I didn't put one in at the time as at the front of the house  I have a strip about 2m wide and in there I need to put a retaining wall, foul drain run and rainwater pipes as well as the perimeter land drain.

 

I am going to install one and connect it to the rainwater run so it all goes to a soak away but figured it would be easier to place when I put all the other stuff in so I can make sure it all gets placed where i need it.

 

My build is on sandstone, when i did a percolation test it drank the water up so I'm having to use the min value for f of 15 (this is off the top of my head so figures/letter may not be correct) however it was storm season when my agg turned up and even though i specced 'clean' there seemed to be a fair bit of dust stuck to it all. I'm concerned that when i compacted it the surface became less free draining than it should have been.

 

Belts and braces, I'm putting the land drain in around the perimeter and I'm sticking one behind the wall too.