 Palms around above ground pool
Amost definate yes, any waterproof membrane laid over the top of the soil grade will every morning create a film of condensation, this cycle of water formation increases the relative moisture content of theupper portion of the soil profile, it is an attractive environment for fine root growth, the spreading of sand to form a level and sharp object free surface also increases the attraction to fine root growth. many of us have seen the disasterous results of paving over weed mat and fine leveled sand in the presence of trees/palms/or even shrubs.
__________________ Sean  Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
- Kahlil Gibran
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