For an architect, a rooftop terrace is a design feature. But for a building owner, it is a potential liability.
The number one cause of litigation in rooftop environments isn’t the aesthetics of the paver—it’s what lies beneath. Poor drainage, membrane rot, and mechanical failure of support systems can lead to catastrophic leaks and expensive callbacks years after the project is finished.
When writing Section 07 76 00 (Roof Pavers), you need a system that guarantees longevity. Here is the 5-point checklist to ensure your specification is the “Safe Choice” for both you and your client.
1. Does the System Protect the Membrane?
The most critical failure point on a roof deck is “Point Loading.” Many adjustable screw-jack systems focus all the weight of the paver (and pedestrian traffic) onto a narrow plastic base. Over time, this pressure allows the pedestal to dig into the insulation or membrane.
The Safe Choice:
Specify a system with a broad surface area. Plots PAVE-EL utilize a grid-like structure that disperses weight evenly across the substrate. There are no sharp edges or narrow points to puncture the waterproofing layer.
2. Is there Active Air Circulation? (The “Rot” Factor)
Trapped moisture is the enemy. Standard pedestals often trap water and humidity against the membrane, creating a breeding ground for mold and rot. If the insulation gets wet, the building loses thermal efficiency.
The Safe Choice:
Look for “Dry Air-Vent Technology.” PAVE-EL’s patented design forces air to circulate between and beneath the pavers. This keeps the sub-surface dry, prevents membrane deterioration, and stops freeze-thaw cycles from heaving the deck.
3. Are there Moving Parts? (Mechanical Failure)
In engineering, moving parts are failure points. Screw-jack pedestals rely on threaded columns to hold thousands of pounds. Over 10-20 years, plastic threads can strip, seize up, or become brittle under UV exposure, causing the deck to become uneven or wobble.
The Safe Choice:
Choose a static solution. PAVE-EL is made of High-Density Polyethylene (HDPE) with no moving mechanical parts. It is a solid, monolithic support system. It cannot “unwind” or break mechanically. This is why we have had Zero Product Failures in 40+ years.
4. Can It Handle Extreme Wind Uplift?
As rooftops become social spaces, they are subject to higher wind loads. Lightweight systems can shift, causing pavers to become dangerous projectiles in storm conditions.
The Safe Choice:
Specify a system with a proven track record in high-security environments. PAVE-EL has been the system of choice for NASA, The FBI Headquarters, and The Smithsonian. If it meets their rigorous safety standards, it will secure your residential or commercial project.
5. Is Installation Foolproof?
Complex systems lead to contractor error. If a pedestal requires laser leveling and intricate screw adjustments, the likelihood of improper installation increases—and so does your liability.
The Safe Choice:
Simplicity saves time and reduces error. PAVE-EL’s leveling plate system allows contractors to correct slopes up to 5% instantly, without special tools. A proper install is intuitive, ensuring the “As-Built” matches your spec.
Conclusion: Don’t Value-Engineer Your Reputation
Saving a few cents on a generic pedestal isn’t worth the risk of a lawsuit five years from now.
When you specify PAVE-EL, you aren’t just buying plastic; you are buying certainty. With a 20-year warranty and a 40-year track record of zero failures, it is the only specification that truly protects the architect.
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