⚠ The Risk

Specifying generic “adjustable pedestals” usually results in threaded screw-jack systems. Over time, building vibration, foot traffic, and temperature fluctuations cause plastic threads to strip, seize, or unwind — leading to a hazardous walking surface.

✦ The Spec Detail

Explicitly specify a Monolithic Support System. Require HDPE pedestals that achieve leveling via static, insertable leveling plates rather than threaded mechanical columns. This ensures the deck will never lose its level over its lifespan.

⚠ The Risk

Trapped moisture between the paver and the roof deck leads to mold, foul odors, and the rapid degradation of the waterproofing membrane — putting the entire building envelope at risk.

✦ The Spec Detail

Do not just specify “drainage.” Require Active Air Circulation ou Technologie de ventilation sèche. The pedestal must have an open-grid design allowing ambient air to flow freely beneath the paver, preventing freeze-thaw damage and rot.

⚠ The Risk

Many pedestals channel the weight of heavy concrete or porcelain pavers through a narrow central column. This point loading can puncture rigid insulation or the roofing membrane — a silent failure that leads to costly remediation.

✦ The Spec Detail

Require a pedestal base that distributes weight evenly across a broad area. The pedestal must grip the protection board without puncturing it, while securing the four paver corners above with built-in spacer ribs.