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Zone 1: The Calm Center

The largest zone on your roof, but with the lowest pressure requirements. See how uniform wind flow keeps the center safer.

Roof Pressure Heat Map - Watch Zone 1 Stay Cool
-38 PSF
ZONE 1
Zone 1: Low (-38 PSF)
Zone 2: Medium (-53 PSF)
Zone 3: High (-67 PSF)
Zone 1 (Field)
-38 PSF
~49% of roof area
Zone 2 (Edge)
-53 PSF
~42% of roof area
Zone 3 (Corner)
-67 PSF
~9% of roof area

The Physics of Lower Pressure

By the time wind reaches the center of your roof, it has already done its worst at the edges. The turbulent separation bubbles that form at the edges reattach to the roof surface, and the flow becomes smooth and predictable.

Think of it like rapids in a river. At the edges of a rock (the edges of your roof), the water is turbulent and chaotic. But downstream (the center of your roof), the water calms down and flows smoothly.

Good News for Your Budget

Since Zone 1 covers about half of your roof and has the lowest pressure requirement, this is where you can use standard roofing materials. The savings from not needing premium products in Zone 1 can offset the extra cost of high-rated materials at edges and corners.

In Monroe County, even the "low" Zone 1 pressure of -38 PSF is still significant. That's 38 pounds of suction on every square foot. A 10 ft x 10 ft section experiences 3,800 pounds of uplift force. But compared to Zone 3's 6,700+ pounds on the same area, Zone 1 is indeed the safest place on your roof.

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