Weed Barrier Under a Pool Deck: Plastic vs. Landscape Fabric

Considerations for Hardscape Underlayment

While plastic sheeting (visqueen) blocks weeds effectively, it has drawbacks compared to permeable landscape fabric:

Plastic Pros

• Complete weed/light blockage.
• Low cost.

Plastic Cons

• Prevents water and air exchange—can harm soil biology and nearby plant roots.
• Creates runoff; water pools on top or runs off edges.
• Degrades under UV; becomes brittle and tears.
• Difficult to plant through later.

Better Alternatives

• Woven landscape fabric: Allows water/air penetration, durable.
• Cardboard/newspaper + mulch: Biodegradable, improves soil.
• Thick gravel base (4–6") with fabric: Standard for pool decks.

Consult a landscape professional for site-specific advice, especially regarding drainage and local codes.