Vapor Barrier for a 30×40 Area
Covering a 30×40 area (1,200 sq ft) with 6-mil poly takes about 2 rolls once you add 15% for overlaps. Enter your own dimensions below.
Poly rolls
2 rolls
Area to cover
1,200 sq ft
With overlap
1,380 sq ft+15% for 6" overlaps & waste
6-mil poly rolls
2 rollseach 10'×100' = 1,000 sq ft
Cost (est.)
$140~$70/roll
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How this is calculated
Mulch volume = bed area × depth. We convert cubic feet to cubic yards for bulk delivery and to 2-cu-ft bags for the bagged option, so you can compare cost both ways.