Attic Temperatures In Florida

You ll find separate tables for each region.

Attic temperatures in florida.

An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. The average temperatures for a year at places around florida are listed below. As an apprentice i once put a thermometer in an attic in miami in august and it read 127 deg. However more often than not.

When those surfaces get wet they rot and mold ensues. Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient. In south florida the typically daytime temperature might be 92 degrees to 95 degrees and the attic temperature might vary from 120 degrees for a tile roof to 140 degrees for a dark color shingle roof. That covers a lot of temperatures on any given day.

An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be. Moisture in the attic is drawn to cold surfaces just as it s drawn to your windows. South florida including the florida keys central florida north florida and the florida panhandle. On one hand the national renewable energy laboratory said attic ventilation reduces attic temperature 10 to 25 degrees and slows the transfer of heat into the living space on the other the florida solar energy center university of central florida found that attics with nominal natural ventilation and r 19 ceiling insulation do not need powered vent fans.

The tables give the normal maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the us national climatic data center. If it s 90 degrees outside the attic temperatures shouldn t exceed 110 according to home inspector jamison brown of amerispec home inspection services in poquoson. And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature. Florida is more than 500 miles as the crow flies from kew west to the georgia state line and more than 200 miles wide.

Parker d sherwin j monitored summer peak attic air temperatures in florida residences presented at the 1998 ashrae annual meeting toronto canada june 20 24 1998. The theory behind attic ventilation is to give that moisture a place to escape before it causes mold mildew rot or other problems. Summer attic air temperatures with old terra cotta colored asphalt shingles peaked at 140 to 145 at 18 above the blown in fiberglass insulation layer at the attic floor.