Climate zone 2A, Salt air environment close to beach
I am building a new home and have a shed roof entry porch attached to the side of a 2 story wall. Construction is metal roof over adhered underlayment on 5/8″ plywood sheathing on roof trusses with tongue & groove wood ceiling finish.
The preference is not to vent the isolated attic area because of salt air exposure to roof connectors. The Florida Building Code requires all attics to be vented and does not make an exception for attics over non conditioned area. A non vented roof would require spray foam to completely encapsulate the attic area which is not doable. Will not venting the porch attic cause problems?
I have spoken with insulation contractors in the area and they state that a porch in that situation is not usually vented or insulated.
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