We received a very distressed phone call from a wonderful lady who had a problem with her artificial lawn and wondered if as the local experts in the area we could assist.Upon arrival you were greeted with a smell that I could only describe as – well you can’t describe it I have never encountered such an odour before but it resembled what I would assume to be rotting flesh. My immediate thought was a buried body or a collapsed drain!The artificial lawn was saturated and as soon as you walked on it, brown water quickly came over your boots.Apparently the lady purchased the artificial lawn from an on-line reseller, don’t get me wrong it was a very good quality lawn and cost nearly £35 per m2 just over a year ago. Unfortunately they couldn’t install it for at least three months but suggested that this was something that she could easily undertake herself.Having studied the installation instructions she asked her gardener to undertake this task.The existing area was sunken and covered with gravel with a slope leading away from the patio running towards the corner of the garden.From what I can gather the installation instructions were correctly followed and for the first few months the lady enjoyed all the benefits of a maintenance free lawn. She opted for an artificial lawn simply as she has four large dogs and didn’t want muddy paw prints brought into the house.So just over a year later her once beautiful lawn was a swamp and totally unusable.

Upon closer inspection the type 1 sub base – referred normally as MOT1 (crushed stone), appeared to be correctly laid and compacted, the area had been levelled of but the rain water just wasn’t soaking down to the soil.

The only solution was unfortunately to remove all of the artificial lawn and sub base and perform more detailed investigation.The artificial lawn couldn’t be saved, with the best will in the world you wouldn’t been able to remove the odour and it was in fact badly cut into position and the joins were also questionable. I did suggest to the lady to contract her gardener to get his views on the problem but unfortunately he has moved back to Poland.Yes a reinstatement of a real natural lawn would have been wonderful but this didn’t meet the requirements due to the small size, large dogs and the area is well known for heavy moss infestation .I submitted a detail quotation for the complete removal and reinstallation on the assumption that they wasn’t any major unforeseen issues, (we knew that a collapsed drain couldn’t be an option as upon checking with the council all the drains have been laid to the front gardens).The quote was duly accepted and work commenced on Good Friday to remove the existing artificial lawn and sub base so that we could see if there were any underlining issues.Access to the rear garden was very limited and unfortunately the materials had to be dug out by hand and barrowed out to a skip. We took five hours to remove 30 m2 area with depths ranging from 7mm to 20mm. During most of this time the rain was consistent with the occasional heavy downpour and true to form the minute we had finished the rain stopped and the sun came out!We believe that we have found the problem, when the garden was originally landscaped the builders laid what appears to be a double layer of damp proof membrane on the soil which went under the central pond feature and then laid various depths of shingle. The gardener simply laid a mot1 sub base directly on the shingles and once compacted a geotextile weed membrane was laid followed by the artificial lawn.The soil under the membrane was very dry and as soon as this was removed, the rain water quickly soaked into the soil and naturally drained away.The damp proof membrane certainly done its job! It stopped water from escaping and just caused the rain water to be soaked up by the mot1 sub base with limited run off to the borders.We are back on site tomorrow to check that the area removed hasn’t become a swimming pool and if we are happy that the root cause has been correctly identified we will commence a proper install.Day Two.We encountered fairly heavy rain Friday evening and into Saturday. The drive to the clients caused me some concern as there was a lot of surface rain water and I wasn’t too sure what we would find!On arrival we found that the area had drained off nicely with only a few small puddles. The soil was firm under foot and most importantly you could smell fresh air!

One or two areas were clearly wetter than the rest, nothing major and we dug a couple of inspection pits but didn’t find anything to cause any concerns. However the side path clearly has some issues with surface rain water. I have a bad feeling about this area but unfortunately the clients are out all day and felt it prudent not to dig their path up or remove their raised borders without first seeking their permission.In one area which was the driest we encountered a concrete slab. Upon removal we found a brick built drain housing, all we could gather that this was possibly from the guttering down pipe. There was only 1 or 2 cm’s of clean water at the bottom of the pit and no visible way of the water escaping! This area was flagged and will need to discuss the possible implications with the clients.

A more pressing concern was the skip still being on site and awaiting to be collected and until it has been removed our supplies couldn’t be delivered! This now required the materials having to be carted over in the vans and with limited opening times over the Bank holiday we would be struggling to get everything on site.However as all other areas appeared to be fine, it was decided that we would commence the sub base installation and monitor how well the area drains off as we have plenty of rain over the next few days. And in good old Easter holiday tradition it started to rain!!To the areas were there is no firm edge, we installed a tanilised timber edgingLaid a geotextile weed membrane (this will prevent the sub base sinking in to the mud).Filled the area with mot1 which was evenly spread with a rake.

The mot1 was then compacted with a wacker plate

Finally a thin layer of sharp sand was laid and again compacted with the wacker plate.

Normally at this point a second layer of geotextile weed membrane would be laid to prevent any weed growth before finally laying the new artificial lawn. However we felt it prudent to delay this for a day or two to see how the sub base performs and besides there were still small areas that required a little more sand to be applied as we couldn’t get all the materials over in the limited time available.The plan is to return tomorrow to discuss the concerns with the client and see how well the sub base has faired. If everything appears to be okay the binding off with the sand will be completed and the second layer of geotextile weed membrane laid. We will leave the actual installation of the artificial lawn for a few days longer and hopefully when the rain has stopped and the sun is shining. I just hope that the client doesn’t let her four dogs loose in the rear garden for a few days!!SundayQuick visit to the client to discuss our findings and agree on some minor remedial action. The sub base was very dry which was reassuring considering the volume of rain we encountered yesterday afternoon and overnight.Job scheduled to be completed on Tuesday as we require the skip to be collected or would have problems getting the new lawn past it and also nice to have a day or two rest!Tuesday 6th AprilEarly start to pick up the new lawn, due to the Bank holiday it was hit and miss as to what actual day we would get the lawn delivered so opted to drive down to pick it up.We completed the remedial work and blinded off the area with sand and then laid the second layer of geotextile weed membrane.The artificial lawn was unrolled and left to settle for a couple of hours in the sun. This helps makes the lawn more workable and allows any creases to be smoothed out.

The lawn is then cut it to shape using a sharp Stanley knife.Joins were then glued and once set, finall trimming of the edges were undertaken using a sharp Stanley knife. The blades must be replaced every 2 to 3 meters - it is amazing how quickly they go blunt.Finally, using 6 inch galvanized nails, the turf was pinned every 6 – 12 inches around the edge.

For this particular project we suggested installing NAMGRASS Green Meadow which is ultra soft and ultra realistic, with its long multi tone green fibres and low down dense thatch effect. The cost per per square metre is currently only £19.95 Inclusive of VAT and represents great value for money and suitable for a wide range of uses.
Votes: 0
E-mail me when people leave their comments –

Comments

  • We now look after the clients garden including a real lawn in the front and must say the fake lawn looks stunning and no drainage issues or bad smells. The dogs love it too.
This reply was deleted.

You need to be a member of Landscape Juice Network to add comments!

Join Landscape Juice Network

Open forum activity

Henry Voice posted a discussion
 
Dear Juicers, 
It's that time of year again (already), finishing off little jobs, last minute present runs... before winding down for the holidays. Christmas is always a favorite in our household, my Dad used to love it, and would keep the…
3 hours ago
Nick @ NM Garden Services Ltd replied to Adam Woods's discussion This works well
"We use one of these https://www.progreen.co.uk/sds-algoclear-softwash-delivery-system-p... - pricey but brilliant. So much quicker to apply, no mixing and nothing heavy to carry."
18 hours ago
Graham Taylor replied to Adam Woods's discussion This works well
"I always find it best to strim off moss where its significantly above the surface and then spray the area.  I uses BAC50 from Trade Chemicals      https://www.ebay.co.uk/itm/232214948482?_skw=bac+50&itmmeta=01J...         I get a 25 litre container…"
20 hours ago
Jake replied to Adam Woods's discussion This works well
"Out of interest what are you spraying to get rid of the moss, how many times a year do you apply and do you find you still need manual removal or are the chemicals good enough?
anything to make life easier im in favour of"
20 hours ago
Fusion Media posted a blog post
ICL Growing Solutions, a global leader in specialty fertilisers, announce today the acquisition of GreenBest, a UK-based manufacturer specialising in tailored specialty fertilisers and solutions for the Sports Turf, Landscape, and Horticulture…
yesterday
Adam Woods posted a discussion
I have a couple of tennis courts to keep free of moss  - both attract it like magnets !My old right arm was having severe difficulty keeping up with the pumping on the 20litre CPG knapsack sprayer. I did a bit of googling and came across this from…
yesterday
Peter sellers replied to Andrew B's discussion Quoting yearly and billing monthly for domestic clients?
"Agree, there's always something that can be done to improve, clients realise they are paying a flat monthly rate so are underpaying in certain months this being balanced out by no or restricted visits in the Autumn / Winter , it's worked for us on…"
yesterday
Graham Taylor replied to Andrew B's discussion Quoting yearly and billing monthly for domestic clients?
"When the weeds are gone?!!  I can see the point you're trying to make though.  There's invariably something more you can do in someones garden to maintain and even improve it.  You could spend an hour in there or all day.  Horror...horrow..... I…"
yesterday
Edward baker and Paul Errington are now friends
PRO Supplier
Wednesday
Fusion Media posted a blog post
The GroundsFest Education Fund is already making a significant impact on the next generation of grounds management professionals, with several students already benefitting from its support.The most recent success story is George Legg, a student…
Tuesday
Matt@AvalonLandscapes.co.uk updated their profile
Monday
Peter sellers replied to Peter sellers's discussion Van security
"A sign written van is asking for trouble, we have never have ours written"
Sunday
John F replied to Peter sellers's discussion Van security
"Good point Graham I only attracted machine and tool theft when I invested in a brand new van and had it signed written , I never encountered a single problem before this .
The problem with older vans is the Caz and ulez charges they attract . 
 "
Dec 15
Graham Taylor replied to Peter sellers's discussion Van security
"not sure about emtying everything out... sounds like a right pain!   All the Stihl stuff comes out for sure and that only takes a couple of minutes.   Might not look so "profesional" but an oldish, tatty van that's not signwritten certainly helps…"
Dec 14
Sam Bainbridge replied to Peter sellers's discussion Van security
"I empty the van every night it takes 10 minutes. They can have the van it's worth more on insurance than I paid since the covid hike. Failing that get a better gate block. I have a friend who drops a concrete block in the middle of that every night…"
Dec 14
Intelligent Gardening replied to Helen Fresson's discussion Day rate for landscaping?
"Do you not find that people then just tell you what your hourly rate is even if you give a figure for the job...and then say it is too high? Say you quoted a big hedge and call it £1000, dont you find that they just say at things like...at £15 per…"
Dec 14
More…