Built-Up Roofing (BUR) in Jacksonville, FL

Service

Jacksonville's commercial roof inventory includes a significant stock of BUR systems installed between the 1960s and 1990s — on Downtown office buildings, Riverside and Southbank commercial structures, older warehouse inventory near JAXPORT, and the legacy industrial base along the St. Johns River corridor. We inspect, repair, and assess BUR roofs for replacement or recover options.

Built-up roofing is a multi-ply system: alternating layers of bitumen (hot asphalt or cold-applied adhesive) and reinforcing felts, finished with a gravel or mineral surface or a smooth cap sheet. At its best — properly installed, well-maintained, and not compromised by moisture infiltration — BUR can perform 30 years or more. The problem in Jacksonville's commercial inventory is that most of the surviving BUR stock is past its designed service life, has accumulated multiple patch layers, and is retaining moisture in the felt plies that compromises both performance and recover eligibility.

I inspect BUR roofs in the Downtown Jacksonville office corridor, the Riverside Avenue commercial strip, the Southbank institutional buildings, and the older warehouse inventory along the Trout River and Near Northside regularly. The pattern is consistent: gravel has been displaced and never replaced, alligatoring is visible across large field areas, drains are clogged or undersized for current drainage loads, and at least two or three patch generations are visible in different membrane colors across the field. The question is always whether the roof is a repair candidate, a recover candidate, or a replacement.

That question cannot be answered from the ground or from a visual inspection alone. Moisture trapped in BUR felt plies is invisible on the surface. Nuclear moisture scanning or infrared thermography on a qualifying evening identifies the extent of saturation before we recommend a scope. A BUR roof with 15% saturated insulation is a recover candidate. A BUR roof with 55% saturated insulation is a replacement — recovering it traps the moisture, voids the new warranty, and produces a failure within a few years.

BUR Assessment in Jacksonville: What We Document

Surface condition: Gravel ballast displacement and gravel embedment condition, cap sheet alligatoring and surface erosion, blister and ridging patterns, lap-seam condition at all ply terminations. On Downtown Jacksonville buildings with gravel-surfaced BUR, displaced gravel is both a waterproofing concern and a wind-uplift concern — loose gravel becomes projectile material during hurricane-force wind events.

Drainage: Drain bowl condition and flow rate, scupper condition, evidence of ponding patterns from surface staining, drain ring and strainer condition. BUR roofs installed before current Florida Energy Code requirements often have inadequate drain capacity for the drainage loads current code requires. We document drain locations, calculate whether they are adequate for the roof area they serve, and flag undersized drainage as a replacement-scope item.

Flashing condition: BUR flashing at parapets, penetrations, HVAC curbs, and expansion joints is the most common active leak source on aging Jacksonville BUR roofs. Bitumen flashing cracks and delaminates with UV exposure and thermal cycling. Within two to three miles of the Intracoastal Waterway, the metal components embedded in BUR flashings corrode faster than inland. We document every flashing condition and photograph against a roof zone diagram.

Moisture assessment: On roofs where the visual inspection suggests possible saturation — blistering, soft spots underfoot, weight-bearing deflection at drain areas — we recommend nuclear moisture scanning or infrared thermography before finalizing a scope recommendation. This is not optional for any BUR roof where recover is under consideration.

BUR Repair Versus Recover Versus Replacement

Repair is appropriate when the roof has isolated damage — a failed flashing, a cracked drain ring, a blown-back seam at a parapet — in an otherwise sound membrane with low saturation levels. Repair buys time to a planned replacement cycle. It does not extend the service life of a roof with widespread felt deterioration or significant saturation.