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I am installing artificial grass in my backyard. 6 weeks ago, I filled the area with base rocks to form the sub-base (3" depth). Then vacation and work got in the way and I couldn't continue the work. Now I am ready to put the leveling sand on top (1" depth). Given the sub-base was sitting there for 6 weeks and there was a bit of rain during that time, does it still need to be compacted with a plate vibrator? I am wondering whether the sub-base has settled on its own by now.

I don't have a plate vibrator and will need to rent one, plus renting a truck to bring it home is a big hassle. If I can avoid it, it's a big plus.

Thank you in advance for your input

Quoc Vu
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Yes you still need the pack the rock!

I hope you did not get pea gravel as it will never pack to create a solid base.

crushed rock or shale still needs to be packed if you want a nice base.

If you don’t do it right the warranty will be void and you end up with paths and wrinkles in commonly walked areas.

Ed Beal
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