Specimens are cut to a set size and weighed, and the result is reported in g/m2 or oz/yd2. It tracks cost and roughly tracks thickness and strength, which is why nonwovens are named by weight in the field. It does not guarantee performance, so specs pair it with strength, puncture and hydraulic properties.
Heard on the job
Mass per unit area weighed out at 7.6 ounces on the 8-ounce roll, and the spec minimum is 7.5, so it passes.
Also heard as
- weight
- basis weight
Related terms
Nonwoven geotextile
Geotextile made by needlepunching or heat-bonding fibers into a felt-like sheet, used for filtration, drainage and cushioning.
MARV
Minimum average roll value: the lowest average test result a product guarantees for any roll it ships.
Conformance testing
Testing samples from rolls delivered to a site to confirm the material matches the specification.