Doors & windows
Wind pressures for your doors and windows.
The design pressure depends on the opening’s size, its height and whether it sits near a corner. We calculate it for each opening and compare it with the product approval you plan to use.
- ASCE 7-22
- FBC 2023 · HVHZ
- Zones 4 & 5
- PE-sealed
- Custom quotes typically $1,000–$2,100
What you get
- Design pressures (+/−) for every opening by size, height and zone
- Comparison against your NOA / Florida Product Approval ratings
- A sealed letter and calculation pages prepared for permit review
- Typical turnaround 2–3 business days
What we need
- Project address
- Window and door schedule (sizes, locations)
- Product approvals (NOA or FL#) for each product
- Elevations or photos, roof height
Send what you have. We’ll review it and let you know what else we need.
Fixed-price packages
Order online, pay once.
- Why do I need a letter if the product is approved?
- The approval says what the product can resist. The permit office also wants to know what your opening must resist at your address, height and zone. The letter connects the two.
- Do I need one per window?
- No. One package covers every opening on the project, grouped by zone and size.
Need wind calculations for your permit?
Send the project details in about two minutes. A licensed engineer reviews them and tells you what happens next.
Request wind calculations