Joined: July 2004
||Posted: 19 Mar. 2019,16:58
Have you read this page?
The sand is an *essential* regulating and cushioning layer.
The sub-base is reasonably permeable, even if it's DTp1 rather than, say, DTp3
I did my own lawn a few yewars back (as shown on thet page) and it has never yet flooded or even so much as gone soggy.
Ants and other burrowers can be an arse-pain, but nothing too serious. Weeds growing *into* the placky-grass are more of a problem. You'll need to treat with weedkiller or biocide once a year at least. The biocide (I use Wet & Forget) seems to have deterred the occasional worm and a few beetles that had previously tried to make a nuisance of themselves, as well as prevent any grass/weed germination.
And, as you will see, I put the edge course in first.....I always do with paving, so I did the same for placky grass....then scraped back as required to accommodate the bedding concrete. Once haunched and hardened, I topped up the sub-base, compacted, placed the sand, screeded and compacted that, and never so much as nudged the edge course.
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