Page 1 of 3
Posted: Tue Jul 05, 2011 9:20 pm
by likkleyout
Hi all. Im a newbie here so hope someone can help me out.
Ive had a patio laid in the back garden (about 45 meters square).
The patio is sloping away from the house, and is enclosed on all sides by brick wall. The back wall is a retaining wall from the lawn which is about 50 cm above the patio level.
The guys who did the job simply didnt think about drainage 
They have built in a small drainage channel near the retaining wall- but the channel is not going anywhere..it is like a small trough just collecting water..
Im not sure what to do - as they have laid a concrete base under the paving slabs - and there are no drains nearby the drainage channel..
I put a hose on for a couple of hours to simulate a good downpour - and found the patio had flooded (nowhere for the water to go)..
I feel stuck now - the builders have done a runner - and i need to fix this myself..
HELP!!!!!
thaks
Posted: Tue Jul 05, 2011 9:45 pm
by lutonlagerlout
you need to dig a deep soakaway in the garden then core through the wall to connect a pipe to it
chances are if you live in london it will be non porous clay so you may have to have an overflow from the soakawy to your foul water system
none of this is particularly cheap
another alternative is to have a bore hole drilled through the patio say 20 m deep with a drain on top
still not cheap
pictures and a site layout would be handy but your options are limited
LLL
Posted: Tue Jul 05, 2011 9:47 pm
by jonnyboyentire
Clearly it needs resolving asap.
Can you post up a decent picture so we can see outside the patio area as well as the problem?
Posted: Tue Jul 05, 2011 9:50 pm
by Pablo
At 45m2 the cheapest option may be to lift an relay it with falls into gullies by the house if it's possible and safe to do so. Is it block or flagstone paving?.
Posted: Tue Jul 05, 2011 10:27 pm
by likkleyout
WoW....you guys really see to know your stuff!!!!
i didnt realise it will become such a complicated matter...
Ive uploaded a few photos to flickr..you can see them here.
http://www.flickr.com/photos/37764328@N02/5906545922/
patio photo
Posted: Tue Jul 05, 2011 11:48 pm
by local patios and driveway
are you sure that drain leads to nothing? take the top grate off and have a look it should have a hole in the bottom at one end, see what you can find there. seems a lot of work to just put the linear drain in without anything to take the water away
Posted: Wed Jul 06, 2011 9:18 pm
by mightyabhabelle
hi horse... if water is a constant problem... I would use a basement type pump and build a small chamber about 2 foot by 2 foot and as deep as you can. You put the pump in there and cover with a slap and point your drains to it. If the water gathers in the one end then no need for drains just put the sump hole there. When the water rises to a height the pump will kick in and push the water down a hose to a lower part of the garden where you can have a drain to disperse the water.
Yes this might sound as over kill and a bit of work but it beats the heck out of looking a water in a nice patio.
If you really want next level stuff... push the water to large water container which could be buried under ground or hidden away and you have water on tap for free in the summer.
regards M
Posted: Wed Jul 06, 2011 9:30 pm
by Pablo
mightyabhabelle wrote:hi horse...
I'm guessing you're Irish all my lads call everyone Horse. :laugh:
Posted: Wed Jul 06, 2011 10:11 pm
by seanandruby
i have always found it very disrespectful to call somebody by an animals name.
I also think your idea is not very good ( pump it to the bottom of the garden ??? )
Posted: Thu Jul 07, 2011 12:15 am
by lutonlagerlout
in the 80 s on subby sites everyone seemed to be called horse,i found it quite endearing when they called me franky
till i realised it was short for "frankensteins monster"
is there no nicknames on big sites anymore sean?
or has that been banned along with whistling,singing ,and smoking?
LLL ???
Posted: Thu Jul 07, 2011 6:37 am
by seanandruby
nicknames are fine, i've no problem with that but animal names ( for obvious reaons ) i dislike. Reminds me of orwells animal farm where a horse was the lowest in ranking & pigs where the bosses.
Posted: Thu Jul 07, 2011 7:38 am
by lutonlagerlout
i always felt that horse was a grudging sign of respect
"strong as a horse" etc
i hated being called boy ,up to the age of 21 ish and now it drives me nuts anyone calling me mate or the latest fad "bestmate"
hehe
LLL
Posted: Thu Jul 07, 2011 10:04 am
by seanandruby
mind you the posters name could be a bit misleading, especially if your name happens to be ley :laugh:
Posted: Thu Jul 07, 2011 10:52 am
by peg basher
shag, brother and spunk seem to be favourites with all the lads i work with!
Posted: Thu Jul 07, 2011 5:49 pm
by dig dug dan
anyway, back to the original problem :p
did the patio get laid on a subbase? What you could do is remove the concrete from the drainage channel, dig down and fill with shingle to see if that perhaps percolates through the entire subbase.
Its not ideal as the other posters have said, but it could get you out of trouble
Seems a very strange place to put the drainage channel too. why not up against a wall. less disruption for slab cutting, levels and work!
I hope you find a pipe connected onto that channel though
question is, if you do, where does it go??