Field glossaryVegetation-free zoneA gravel or paver border at the perimeter and around penetrations for wind scour resistance, access, and fire breaksUsed across 2 Anvilfield field guides, most in Roofing. Where this shows upRoofingGreen roof maintenance programRoofingGreen roof installation Related termsOverburdenVegetative / green / living roof Back to the full field glossary