Said It Here

Why won't sand compact as a sub-base?

Sand cannot be compressed or compacted into a hard layer; it merely shifts around when pressure is applied over a hard sub-base. Instead of compacting it, sand must be screeded if it is being used to level a surface.

Overview
People affected2 accounts across 1 forum
Workarounds found1 item attempted
Community agreement6 total upvotes

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

Found another way around this?

Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.

  1. 1
    Screed the sand instead of trying to compact it.
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In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/Landscaping2 people · September 2026

“You can’t compact 1-2 inch of sand … Your just squishing it about, given the hard sub-base”source ↗

bosscockuk · r/Landscaping · 3 upvotes

“Sand doesn't get compacted. Sand is screeded if you need to level it.”source ↗

userken87 · r/Landscaping · 3 upvotes

Where this came up

People with this problem also raised