Rooftop terraces are no longer just a luxury add-on—they’re a design expectation for commercial, residential, and mixed-use developments from Miami to Seattle. But rising demand has coincided with greater scrutiny of paving systems, particularly in high-wind regions.
The introduction of dedicated provisions for roof pavers in ASCE 7-22 has sharpened focus on rooftop assemblies. Structural engineers and architects working in high-wind coastal zones and high-velocity hurricane zones (HVHZ) must account for wind uplift, roof zone pressures, occupant safety, and ASCE 7-22, all while delivering functional, attractive outdoor spaces.
ASCE 7-22, introduced by the American Society of Civil Engineers, is a design standard for roof pavers, recognizing their unique behavior under wind loading. Before ASCE 7-22, rooftop pavers were largely treated as an ancillary roofing component with limited direct guidance.
The introduction of the standard reflects a broad industry trend: rooftop terraces are no longer niche features. They’ve become common elements in residential towers, hospitality developments, and commercial buildings, particularly in coastal cities where outdoor amenity space commands a premium. As a result, specifiers are expected to evaluate rooftop paver systems with the same level of scrutiny as other rooftop components exposed to wind forces.
ASCE 7-22 places particular emphasis on buildings located in exposure categories C and D, where open terrain and coastal waterfront conditions can significantly increase wind pressures acting on rooftop paver assemblies. For specifiers, understanding site exposure is a critical first step in selecting a compliant rooftop deck system.
One of the most significant challenges in coastal rooftop designs is load distribution and the mitigation of wind uplift. Unlike ground-level paving, rooftop pavers are exposed to complex wind forces that can create uplift pressure, particularly around roof perimeters, corners, and parapets.
Modern paver tray systems are designed to address these forces and distribute wind uplift through a combination of weight distribution and engineered restraint. A paver system holds and connects individual pavers within a modular framework, creating a stable rooftop surface.
The tray mechanism must do this without moving. Even minor lateral displacement under cyclic wind loading abrades the membrane below. Over time, that abrasion becomes a warranty issue and eventually a waterproofing failure.
A properly engineered non-penetrating system with positive interlock, a controlled pedestal footprint, and membrane-compatible base pads satisfies the ASCE 7-22 structural demand while keeping the membrane intact.
Bison offers a wide range of porcelain roof pavers, engineered paver trays, and pedestal systems, designed to enhance rooftop performance by supporting wind resistance, drainage efficiency, and long-term stability in exposed, coastal environments.
Selecting the right deck pavers requires more than reviewing aesthetic options. Product origin, testing standards, technical support, and supply chain reliability can all influence project outcomes.
For US-based projects, sourcing systems designed and manufactured for the domestic market can provide several practical advantages.
Products designed specifically for the US construction market are more likely to be accompanied by documentation that aligns with local code requirements, testing methodologies, and specification practices.
This can simplify the design review process and provide greater confidence when demonstrating compliance with ASCE 7-22 wind design requirements.
International sourcing can introduce longer lead times, transportation delays, and additional coordination challenges. For projects operating under tight construction schedules, local manufacturing often provides greater certainty regarding product availability and replacement components, and reduced cross-border specification risk vs. European imports.
Early collaboration between specifiers and manufacturers is increasingly important when designing rooftop assemblies in coastal environments.
Manufacturers with a local presence are typically better positioned to provide:
This type of support can help reduce specification risk and minimize delays during design reviews.
ASCE 7-22 raised the bar for specifications for roof pavers in coastal zones, but it also created a clear pathway for compliant, membrane-protective assemblies.
Bison paver systems are engineered for US wind load requirements, supplied with ASCE 7-22-ready documentation, and backed by domestic technical support.
For dedicated support for your next project, speak to our team.
Important Notice: Bison Innovative Products recommends that all rooftop deck systems should be installed by a licensed contractor with at least 2 years of proven experience. Plans/designs for a rooftop deck should be reviewed by a safety/structural engineer before commencing construction. The roof must be able to safely carry the static and live load weights of the rooftop deck, and any amenities added along with the appropriate density of any insulation to resist crushing and damaging the waterproof membrane. Adding items such as hardscaping features, hot tubs, or pools to a rooftop deck requires additional guidance and oversight from an engineer. Property owners should research and abide by any building codes and other regulations to obtain the required permits prior to having a rooftop deck installed. Please read all product specifications posted on Bisonip.com to review all information prior to any installation.