{"id":"zon-020","license":"CC-BY-4.0","data":{"title":"Mulch comparison at true scale","file":"/diagrams/zon-020-mulch-comparison.svg","caption":"FA Exhibit ZON-020. Bark and rubber mulch are combustible. Rock and decomposed granite are the five-foot path in the cited studies.","alt":"Side-by-side groundcover swatches of bark mulch, rubber mulch, rock, and decomposed granite, labeled for use inside versus outside the first five feet.","kind":"diagram","rights":"cc-by-4.0","depicts":"Combustible versus noncombustible groundcover in the five-foot band","identifiableAddress":false,"exifGpsStripped":true,"derivation":"After UNR SP-11-04 mulch combustibility study and IBHS Wildfire Prepared groundcover language.","technicalReviewer":"Grayson Graham","lastVerified":"2026-08-23T00:00:00.000Z","sourceUrl":"https://wildfireprepared.org/wp-content/uploads/WFPH-Technical-Standard.pdf"}}