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a <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 5th Edition <br />(2014) Residential R806. <br />The Minimum net free ventilating area shall be 1/150 of the area of the vented <br />space. The ventilating area may be reduced to 1/300 provided that at least 40% <br />but no more than 50% of the required ventilation is provided in the upper portion of <br />the space to be ventilated.Upper ventilators shall be located no more than 3 feet <br />(measured vertically) below the ridge or highest point of the space, with the <br />balance of the required ventilation provided by eave or cornice vents. <br />-CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN - <br />(Values to be verified with Manufacturer Specifications) <br />• RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />.......... .................................................................. .. ................... ........ <br />.. ............. ............. .. <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA! SQ. FT. <br />• �:.� <br />• • • <br />• O'HAGIN WEATHERMASTER (Shingle Roof) - 72 SQ. IN. OF NET FREE AREA/ FT. <br />** (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed)172 = Amount of O'Hagin Vents Needed <br />�.':. • <br />• LOMANCO DECK -AIR (Shingle Roof). 9 IN. OF NET FREE AREA! <br />: <br />VENTED SOFFIT 50 SQ. FT. <br />Needed) Needed) <br />*"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) 19 = 'near Ft. of Deck -Air Needed) <br />•�•� <br />`r • • <br />• O'HAGIN (Tile Roof) - 86.25 SQ. IN. OF NET FREE AREA / VENT <br />.� <br />1. ..� <br />f,•: •• <br />-Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) 186.25 = Amount of O'Hagin Vents Needed <br />ZONE-1 <br />� <br />ATTIC SPACE <br />3235 SQ. FT. <br />:: <br />7.7 <br />V <br />• •�.� <br />•• • <br />LLL <br />ILL <br />•'� <br />�••• <br />W <br />W <br />N <br />r.' <br />H <br />• ' <br />Lj- <br />: •� <br />L.L. <br />�•••• <br />w <br />••LU <br />::1 <br />% <br />:A <br />'•� <br />�.' <br />�W. <br />00*0 <br />�.' <br />._.� <br />...� <br />.' <br />.�.� <br />'.1 <br />(�[•• <br />...� <br />jj.' <br />:.,� <br />t: <br />�.: <br />:• <br />�.. <br />�:• :•. <br />��. <br />••• <br />ROOF PLAN -A_ <br />VENTED SOFFIT 59 SQ. FT. <br />SCALE: %4"=V-0" <br />ATTIC VENTILATION CALCULATIONS - A <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />11300 Rule <br />Ridge Vent Amt <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />r <br />zM <br />0 <br />z� <br />z <br />Q <br />O <br />J <br />Z <br />� <br />n� <br />w <br />m <br />Q <br />w <br />O � <br />~ <br />O <br />f— <br />m ti <br />U <br />W <br />� Ep <br />�M <br />C N M <br />N :O M <br />O <br />— U <br />O O <br />wig0 <br />I <br />5 <br />