Boom-era attics and their minimums
The great western build-out (Pembroke Pines, Weston, Coral Springs’ later rings, Coconut Creek’s north) was constructed quickly, to code, by builders installing exactly the ventilation the code required and none more. Thirty years of South Florida summers have been auditing that decision ever since.
- 1 Ridge caps. The ridge is first to bake, first to lift.
- 2 The field. Barrel tile or shingle, over an underlayment quietly doing the work.
- 3 Valleys. One line carrying what two slopes shed, at the pace this coast rains.
- 4 Flashing. Where salt reaches the metal years ahead of the covering it protects.
- 5 The vent boot. A rubber collar that hardens, cracks, and lets the rain straight in.
- 6 Eaves. Where the screen enclosure meets the roof, and where fasteners give up.
What the minimum costs
An attic that cannot exhaust runs far above outdoor temperature through the long summer and holds that heat against the underside of the deck. The covering above ages from both sides, sun on top, oven beneath, and retires years early; the cooling bill pays the difference monthly in the meantime. The common finding on this housing is specific: soffit intake that exists on paper but sits buried under blown insulation, and ridge or static exhaust that never had matched intake to draw from.
South Florida adds its own twist: condensation in summer. Humid outdoor air meets surfaces chilled by air-conditioning ductwork and condenses: sweating ducts, damp insulation, stains on the deck near supply runs. It looks like a leak, gets hunted as a leak, and is actually the attic’s air balance failing.
The one inexpensive day to fix it
Replacement day. With the deck open, correcting intake and exhaust to a balanced system costs a fraction of any retrofit, and on this vintage it is the single highest-value line in the quote, worth more to the new covering’s life than any brand upgrade. The scope should name intake and exhaust separately with numbers attached. « We reinstall the existing vents » is not a ventilation scope; on a 1990s production home it is a promise to repeat the problem.