About 89% of Highland Beach homes are in multi-unit buildings, mostly 10- to 15-story condominiums on A1A between the Atlantic and the Intracoastal. Balcony sliders up there take wind off open water, which drives the rating they need.
The town's permit asks for a window and door schedule listing each opening's product approval number, its pressure ratings, and engineered wind loads. Everything is uploaded as PDFs through MGO by a registered contractor, and association approval is typically needed before work.