Home DIY

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artificial grass

Iirc @Soul had some in his old place.

I'm about to do this on a 4mx4m area

Seems it's all in the prep. Recommendation is a couple of inches of MOT type 1 which will be about 1.5 tonnes of the stuff. Weedproof membrane on top of that and then the grass which conveniently comes in 4m width so you shouldn't need to join it.

At that size I'd look at the websites that do offcuts, you can get it from them considerably cheaper (although hefty delivery charges).

EDIT: Just noticed you said decking. In that case the artificial grass suppliers all seem to provide foam pads to go under the grass.

If you're attaching it straight to the decking, you'll need to consider drainage, state of current decking (ie is it rotten / rotting already), how you're going to attach it and what it's being used for.

I would consider putting down a shock pad to make it child friendly.

We dug out our 3x4m lawn and replaced it with Namgrass. It's turned out to be a brilliant decision as it looks good (with brown curly strands to simulate dead dried grass, so it looks more natural), cleans easily, and drains through well enough to be dry not long after it's stopped raining. We regularly have breakfast on the lawn once it's even slightly warm. If you're doing it on decking then prep should be minimal and it can be nailed down to secure it (if you don't mind nails into your decking), but you may well want a foam mat underneath, partly to prevent the grass wearing through from movement of the decking as people walk on it.

Namgrass do samples, which is useful to check what look and feel you want to go for.