Best Attic Ventilation For Florida

I ve read where this disrupts the natural flow up from the soffits due to old turbines and new ridge vent.

Best attic ventilation for florida.

In of vent opening per 150 sq. The florida building code identifies two distinct climate zones. The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows. Best ventilation is open soffit venting to a open vented ridge vent.

The typical method for ventilating the attic on an average home is soffit and ridge vent. So it s time to pay close attention to what s happening up there. Attic for example has an area of 1 200 sq. Some fans are twin speed so two cfm ratings are given.

I suspect the thinking was the more the better. A 30 x 40 ft. It can do both. Typically current best home building practices indicate an r 30 to r 38 for attic insulation.

Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer. Of attic floor space. Of net free area for every 150 sq. Then aim for about 1 sq.

I come across many homes that originally had soffit venting and wind turbines at the peak but continuous ridge venting was added later during a re roof. One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home. Climate zone 1 consists of the following south florida counties. First determine your attic area by multiplying the length by the width.

According to the florida department of agriculture and consumer services attic insulation is the most important location and best return on investment okay but why. Insulation at least r 38 or more is there for heating and. This means for every 150 square feet of attic floor space there should be 1 square foot of net free area. Intake vents located at the lowest part of the roof under the eaves.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. Let s say you measured your attic and you realize your attic has about 9 inches r 30 of insulation and your attic is about 40 sq feet you d need at least 3 inches of extra insulation that covers 40 sq ft to get an r value of r 38. Motor power given in amps or horsepower isn t a major factor so long as it generates the required cubic feet per minute.

The building code lets you reduce that by half under some conditions but more roof ventilation is usually better.