Fire Treated Foliage David Hurtado Sep 3, 2026 Table of Contents A design team preparing submittals for a hospitality lobby recently ran into a snag that had nothing to do with the mounting hardware for their feature wall. The general contractor’s fire consultant approved the steel frame and the anchoring plan without comment, then sent back a single open item: a current test report for the leaf material itself, matched to the exact product line going into the screen leaf panel installation, not a generic manufacturer letter. That gap between “the structure is rated” and “the foliage is rated” trips up more projects than most specifiers expect. It happens because two separate fire questions get folded into one review item. A large-scale foliage installation is built from at least two material categories that get evaluated on different terms: the trunk, branch, or frame components that carry the piece, and the leaf, vine, or grass material that fills it out. We cover the structural side elsewhere; here we’re staying entirely on the foliage material itself, because that piece of the submittal has its own chemistry, its own test methods, and its own maintenance rules once a project is occupied. Getting that distinction right early saves a redesign later. A specifier who understands how leaf material actually gets treated, which standard applies to which application, and how treated foliage behaves differently than untreated stock over years of cleaning and daylight exposure can close out a fire review in one round instead of three. How Flame Retardant Treatment Actually Works on Leaf Material Most commercial artificial foliage is built from polyethylene sheeting, PVC, or woven and non-woven fabric, and each substrate takes flame retardant chemistry differently. Polyethylene leaf material, the most common choice for realistic outdoor-grade and high-traffic indoor foliage, can be treated in one of two ways. A retardant can be compounded directly into the resin before the leaf is molded or extruded, so the chemistry is part of the material rather than sitting on top of it. Or it can be applied topically after the leaf shape is formed, typically as a coating or dip that bonds to the surface. The difference matters more than most spec sheets explain. Compounded-in treatment holds up for the working life of the material because there is nothing on the surface to wear away. Topical treatment performs the same way on day one, but it can degrade with repeated cleaning, direct sun exposure, or abrasive contact, which is why a topically treated product sometimes needs a retest or a refreshed certificate a few years into a project rather than a permanent one-time approval. Fabric-based foliage, less common than molded leaf material but still specified for softer or trailing plant forms, is almost always treated topically or backcoated, since the flame retardant has to be applied to woven or non-woven material after it’s manufactured. Which Fire Test Standards Actually Apply to Foliage Material Fire marshals and plan reviewers rarely have a code section written specifically for artificial foliage, so they apply the standard that matches how the material is installed and behaves in a flame test. That means the correct standard depends on whether the foliage hangs loose, drapes, or sits flat against a wall or ceiling surface, not on habit or whichever certificate happens to be on file. StandardWhat It TestsWhere It Fits Foliage Material NFPA 701Vertical flame propagation and afterflame time for textiles, films, and other draped or hanging decorative materialVine, trailing foliage, and fabric-backed leaf material that hangs or drapes rather than mounting flat ASTM E84Flame spread and smoke-developed rating along a horizontal test tunnel, producing a Class A, B, or C interior finish ratingLeaf and foliage panels mounted flush against a wall or ceiling as a finish surface rather than a hanging element California TB 117-2013Smolder and open-flame resistance, written for upholstered furniture foam and fabric componentsRarely the correct test for sheet or molded leaf material, though specifiers sometimes request it out of habit when planters include cushioned or upholstered elements In practice, most large foliage submittals lean on NFPA 701 because it was written for exactly this category of material: decorative textiles, films, and simulated foliage that a fire could spread across quickly if untreated. Reviewers who ask for California TB 117 on a straightforward leaf panel are usually applying the wrong test, and it’s worth pointing that out during submittal review rather than chasing a certificate that doesn’t actually match the product. What Treated Foliage Looks and Performs Like Compared to Untreated Stock A well-treated leaf holds its color, sheen, and flexibility close enough to untreated stock that most people can’t tell the difference by looking at it. Where the difference shows up is in handling and long-term care rather than appearance on day one. Treated foliage can feel marginally stiffer at the leaf edge immediately after topical application, though that softens with handling, and geoleaf-style foliage panels built with compounded-in retardant tend to keep a more consistent texture across the whole piece than a leaf that was dipped after molding. Cost is the other real difference. Compounded-in flame retardant adds material cost across the entire production run, while topical treatment adds a finishing step but not a resin change, so the two approaches land at different price points for the same visual result. Neither is universally better; the right call depends on how long the installation needs to hold its rating without recertification and how much cleaning the foliage will see over its service life. Cleaning and Maintenance Considerations for Treated Foliage Cleaning routine matters more for treated foliage than most facilities teams realize. Strong solvents, degreasers, or abrasive scrubbing can strip a topical flame retardant faster than normal dust and UV exposure would, which quietly voids the certification even though the foliage still looks fine. Compounded-in treatments are far more forgiving here since there’s no surface layer to remove, which is one reason it tends to get specified for high-traffic lobbies, corridors, and other areas that see frequent cleaning. Manufacturers of soft leaf panel material and similar products typically publish an approved cleaning method alongside the fire test report, and that document should travel with the certificate through the life of the project, not just at handover. Facilities teams that inherit a fire-rated foliage installation without that maintenance guidance are the ones most likely to unknowingly compromise the rating a few years in. Specifying and Documenting Fire Treated Foliage A complete submittal package for fire treated foliage should tie the test report to the actual product being installed, not just the manufacturer’s general product line. That means matching the report to the correct material type, color, and, where treatment is topical, ideally the batch or production run, since a generic letter covering “all foliage products” rarely satisfies a thorough plan review. Large installations that combine hanging vine material with flat-mounted leaf panels, like the mix used across large feature tree canopies or commercial potted plants and planters, may need documentation under more than one standard within the same submittal, since each installation method can trigger a different test. It’s also worth remembering that foliage material documentation only answers part of the fire review. Any tree, planter, or wall system that pairs treated leaf material with a trunk, branch armature, or mounting frame will need that structural component evaluated and documented on its own terms, separate from the foliage certificate. Reviewers who see only one report often assume it covers the whole assembly, and correcting that assumption early avoids a resubmittal late in the schedule. For flat-mounted applications specifically, reviewers increasingly ask for the ASTM E84 surface burning characteristics rating alongside NFPA 701 documentation, since a panel installed against a wall behaves more like an interior finish material than a draped decorative element once it’s in place. Comparing material options before finalizing a design is worth the time it takes, since choosing the right foliage material for a commercial space up front avoids a substitution later, when swapping products after fire testing is already underway costs schedule and budget rather than just design preference. Conclusion Fire treated foliage isn’t a single checkbox on a submittal; it’s a material decision that depends on how the leaf or vine is built, how it’s mounted, and which standard actually matches that installation method. Compounded-in treatment costs more up front but holds its rating without much maintenance risk, while topical treatment can match it in appearance but needs cleaning discipline and, in some cases, periodic recertification to stay compliant. Getting the standard and the documentation right before installation, rather than during a stalled review, is what keeps a foliage-heavy project on schedule. FAQ Is fire treated foliage required by code, or only sometimes requested? It depends on occupancy type and jurisdiction rather than a universal code requirement. Public assembly spaces, healthcare facilities, schools, and transportation hubs tend to require documented flame retardant treatment for any simulated foliage as a matter of course, while lower-occupancy commercial spaces may only face the question if a life-safety consultant raises it during design review. Does treated foliage look or feel different from untreated foliage? Not meaningfully in most cases. Modern compounded-in and topical treatments are formulated to preserve color, flexibility, and texture, so the visual difference between treated and untreated leaf material is usually not noticeable once the piece is installed and viewed at normal distance. How long does flame retardant treatment last on artificial leaf material? Compounded-in treatment lasts for the service life of the material since the chemistry is part of the resin. Topical treatment can wear down over years of cleaning and UV exposure, which is why some projects schedule a recertification check rather than assuming the original test report remains valid indefinitely. Can fire treated foliage be cleaned with standard commercial cleaning products? Only if the product is listed in the manufacturer’s approved cleaning guidance. Strong solvents and abrasive cleaners can strip a topical flame retardant even when the foliage still looks clean, so facilities teams should follow the documented method rather than a general-purpose cleaning protocol. Does a fire rating on the foliage cover the whole tree or planter assembly? No. The foliage certificate covers only the leaf, vine, or grass material itself. Any trunk, branch armature, or mounting structure paired with that foliage needs its own separate fire documentation, since reviewers evaluate structural and foliage materials on different terms.