Single Hung Impact Windows for Pembroke Pines Homes

This is the single most misunderstood thing about product approval, and single hungs are where it bites hardest, because a house typically has a lot of them in several different sizes.

A Notice of Acceptance issued by the Miami-Dade County Product Control Section does not approve a manufacturer. It does not approve a product line. It approves a specific product in specific configurations, at specific maximum sizes, installed in a specific described way. The document states what it covers, and anything outside that description is outside the approval.

So a bid promising “approved single hungs” has not said anything about your house yet. The meaningful statement is that the 53×63 opening in your primary bedroom and the 26×38 opening in your hall bath are each covered, at those sizes, in that configuration, by an approval that also describes an installation into your substrate. Those are two different lines on a document, and on a whole-house job there may be six or eight of them.

Glazing within the lowest 30 feet of exterior building walls must resist large missile impact. Above 30 feet the requirement drops to small missile. A single-story Pembroke Pines house tops out around 10 to 12 feet at the wall, and a two-story house does not come close to 30 either.

The consequence is uniform and it is worth stating plainly, because homeowners often assume otherwise: the small bathroom window is a large-missile opening. The kitchen window over the sink is a large-missile opening. The window on the sheltered side of the house behind the neighbor’s hedge is a large-missile opening. There is no size threshold below which the requirement relaxes and no orientation that exempts a wall.

The same logic disposes of partial jobs. Doing the front elevation now and the back next year does not leave you half-protected in a code sense — it leaves the back elevation unprotected, and in the HVHZ every exterior opening must be protected against wind-borne debris.

Two single hungs of the same size on the same house can carry different design pressure requirements. Corner zones of a wall behave differently from field zones. Height above grade matters. Exposure matters. The risk category assigned to the structure matters.

What comes out of that calculation is a positive and a negative design pressure for each opening, and each has to sit inside the approved range for the unit you are putting there. That is why the work starts with an on-site measure rather than a photograph, and it is why you should be suspicious of a single per-window price applied uniformly across a house — it implies the openings were never evaluated separately.

You will not find a design pressure number or a design wind speed printed on this page. Those values belong on your sealed plans and on the approval document for the unit that goes in, not in marketing copy where nobody can check them against your address.

Your permit goes to the City of Pembroke Pines Building Department at 601 City Center Way, phone (954) 435-6502, not to Broward County. The County’s Building Code Division serves 22 municipalities under Inter-Local Service Agreements and Pembroke Pines is not among them. The City enforces Florida Statutes, the Florida Building Code, Broward County ordinances and City of Pembroke Pines ordinances.

Under § 553.842, F.S., the City cannot demand further testing or evaluation of a product that already holds statewide approval, so long as it is used consistent with the conditions of that approval. What the City can do — and this is the part that matters on a multi-opening single hung job — is deny the local application of an approved product where the documentation shows the application is inconsistent with those conditions. A denial of that kind is appealable under § 553.77, F.S.

In other words, the review is not about whether the window is good. It is about whether this window, at this size, in this configuration, anchored this way, matches its paperwork.