Enter an address and the roof details. Get the ASCE 7-22 net uplift in psf, zone by zone — field, edge, and corner — for gable, hip, flat, and monoslope roofs, then download a permit-ready Engineering Report. The design wind speed is looked up for you.
Enter the roof once; the suction comes out in psf, zone by zone — cited, and permit-ready.
Roofs aren't loaded evenly — the corners lift hardest. This calculator returns the uplift for each zone at your effective wind area, so the fastener schedule and the edge detail are sized to the number that actually governs.
Type a ZIP and the design wind speed is looked up — then the calculator applies exposure and the enforceable Florida Building Code value in the HVHZ, so the corner uplift matches the jurisdiction.
The output is a full Engineering Report, not a black-box number. Every coefficient behind the uplift cites its ASCE 7-22 section so a reviewer can follow the math line by line.
The math is ASCE 7-22; the workflow is plain language.
Type the ZIP or address. The mapped ASCE 7-22 design wind speed and the site exposure come back instantly.
Set the roof shape, slope, mean height, and enclosure, plus the effective wind area of the element you're checking.
The net suction comes out in psf for the field, edge, and corner zones, with the Florida HVHZ value applied where it governs.
Export the Engineering Report as a PDF — every coefficient cited to its ASCE 7-22 section for the permit set.
Pick the roof; the calculator returns its uplift, zone by zone.
Pitched roofs where uplift varies with slope — the windward eave and ridge and the corners see the sharpest suction.
Near-total uplift everywhere, all the time — the corner and edge zones govern the membrane, ballast, and fasteners.
Single-slope roofs where the high side and the corners carry the governing suction for panels and clips.
The extra uplift from wind driving up under an overhang, added to the top-surface suction at the edge.
Small effective wind areas — a seam or a clip reads a higher coefficient than a broad field of deck.
Single-ply and ballasted low-slope systems where corner and perimeter uplift sets the attachment pattern.
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No paid testimonials — a verifiable 24-year track record.
Yes. The design wind speed lookup is free for any U.S. ZIP with no signup, and the free calculator returns a single roof component uplift pressure. Full roofs by zone, other surfaces, and the downloadable Engineering Report are on the paid calculators, with a free trial to start.
You give it the roof and the ZIP; it takes the velocity pressure for your mean roof height and multiplies by the ASCE 7-22 roof coefficient that matches the zone and the effective wind area. That coefficient is negative, so what comes back is outward suction — the net uplift in psf, split out for field, edge, and corner.
Gable, hip, monoslope, and flat or low-slope roofs, plus overhangs. Tell it the shape and pitch and it picks the matching ASCE 7-22 roof figure, lays out the zones, and hands back the uplift for each one.
No. The software produces an Engineering Report, not a sealed document. A PE sign-and-seal is a separate professional service, available in all 50 states through our in-house Florida P.E. (residential up to three stories) and our PE network for everything else.
Yes. For the High-Velocity Hurricane Zone counties — Miami-Dade and Broward — it applies the enforceable Florida Building Code design wind speed automatically, so the corner and edge uplift you submit is the value the jurisdiction checks against.
As wind peels over a roof edge it spins into vortices, and those are fiercest at a corner where two edges converge (Zone 3). Corner suction can run to a multiple of the open-field value — so the corner number is what sizes the fasteners and the edge metal.
No. You enter the roof and location details in plain language and the calculator applies the ASCE 7-22 procedure — exposure, Kh, Kzt, Kd, GCp, and internal pressure. Where a jurisdiction requires a stamp, PE seal service is available.
Enter a ZIP and the roof details and get the ASCE 7-22 net uplift in psf, zone by zone, with a downloadable Engineering Report. Start with the free calculator, or see every calculator and its pricing.
See how roof suction, zones, and GCp work, step by step, on our roof wind uplift guide — then run your roof here.
Open the free calculator →