Check the design pressure and the product approval before the purchase order — so the submittal clears the first time and the crew never stops for a wrong window.
Three job-site failures this calculator stops before they cost you money.
Order the window, then learn its approval falls short of the design pressure — that is a restock fee and a delayed close-in. Check it in seconds instead.
In Miami-Dade and Broward the building official enforces the Florida Building Code value. Submit the base ASCE map number and you fail the desk review.
A black-box number invites pushback. Every coefficient on our report cites its ASCE 7-22 section, so the reviewer can follow it line by line.
Four plain-language steps. No engineering background needed.
Type the job's ZIP or address. The design wind speed and exposure come back instantly.
List each window, door, and shutter. The required pressure is calculated per opening.
Enter manufacturer and model. Get a clear pass or fail before you cut the PO.
Download the PDF report and the .xlsx schedule. Hand it to the supplier and the building department.
Vet supplier and product certifications before the buyout, so a wrong spec never becomes a change order mid-job.
Confirm each unit's rated pressure clears the opening before install day — no callbacks for a non-compliant product.
Pull the right HVHZ value on a coastal retrofit and document compliance for the threshold inspection.
Show the customer the required pressure and prove the product meets it, with an inspector-ready paper trail.
Run the numbers in-house during pricing so the bid reflects the real product cost, not a surprise upgrade.
A guided workflow anyone on the team can run from a phone on site — no waiting on the engineer's queue.
Other roles: Engineers · Architects · Consultants
No paid testimonials — a verifiable 24-year track record.
No. The guided workflow asks plain-language questions about the job address and the openings, then handles the ASCE 7-22 math for you. Builders and field crews run it without an engineering background.
Enter the job address to get the required design pressure, then enter the manufacturer and model. The calculator compares the product's rated pressure against what the code requires and flags a clear pass or fail before you place the purchase order.
Yes. For High-Velocity Hurricane Zone counties the calculator applies the enforceable Florida Building Code value rather than the base ASCE 7-22 map number, so the pressure you submit is the one the inspector is checking against.
Our reports carry a 100% permit-approval record across 24 years. Every coefficient cites its ASCE 7-22 section so a plans examiner can follow the math, and PE sign-and-seal is available in all 50 states through our PE network.
Yes. Export an .xlsx schedule that drops straight into AutoCAD and your purchase order, listing each opening, its required pressure, and the approved product — so the order matches the permit set exactly.
Catching a wrong product before the PO avoids restocking fees, change orders, and a failed inspection that idles a crew. One avoided re-order on a single opening typically covers the subscription.
Yes. The free wind speed lookup returns the design wind speed for any U.S. ZIP with no signup, and a 7-day full-access trial lets you run a live job from address to report before you pay.
Yes. PE sign-and-seal is available in all 50 states through our in-house Florida P.E. and PE network. Florida residential work up to three stories is sealed in-house; out-of-state work is routed to a licensed engineer in that state.
Verify the design pressure and the product approval before the order ships. Start a free 7-day trial — or run the free wind speed lookup on your next job address right now.
The free wind speed lookup covers every U.S. ZIP and applies Florida Building Code overrides for Miami-Dade, Broward, and Collier counties. No signup, no meter.
Try the free lookup →