Laserfiche WebLink
•v � w.0 uw�.w uv�w�yvuaww.wu ✓ucewvvui. rvic. ✓�uu�y niaw•r.nniNuu�� nvn ✓wn�y.uwy, we✓icvvi i .. c.�✓ � iv, �a..w <br />Ap <br />* •► •� ,► <br />EA* <br />M, ;i [�Jil III :R41 M Ur!".4 <br />Roof De€�c: it a an1X aver well -seasoned, supported woad dew, tightiy <br />consinsted with ntaximt>lrn S» wide lumber, having adequate nail -holding <br />capacity. Plywood docking as recommended by the Engineered Wood <br />Association is acceptable. <br />For ri:�e vent to function pmp+edy, it must tm the only Ngh or exhaust vent <br />Joy thmted attic spade. Ridge vents will not function property if used in <br />conjunction with gable -end louvers, turbines, rout vents or power vents. <br />Slope Restrictio= Use only on slopes between 3112 and 16/12 <br />STEP 1 <br />calculations for a Balanced Ventilation System <br />To achieve a "bahmed : phim- with Crites fudge Runner"ridge vent. there <br />must be an air Intake system (i.e., eai`ttl or undereave vents). For poor vsoblation, <br />the amount of skWom ventilation roust equal the arrm nrt of llentiledon at <br />the ridge. : in no case sWuld the amount of exhaust ventilation exceed ttte <br />Amount of intake ventilation. <br />To determine the minimum square feet of rot free ventilaft area (NFVA) <br />needed for a balanced ventilation system, use fire foltowirrg formula. <br />Sq. rt. of attic floor space _ Min. Sq. ft.. of NFVA needed <br />300 <br />Cobra* Ridge FlunnW ridge vent has 12.5 square inches of NFVA per lineal toot. <br />To determine how many feet of Cobra" Ridge RunneCridge vent is needed, <br />use the following famwla: <br />1't2 x (Min. Sq. f, of NFVA needed) x 144112.5 = Min, lineal feet of ridge <br />vent needed <br />To determine the amount of undereave vent required, use Ow following formula: <br />X = NFYA (Sq. In, per. tire, f1.) of ft undar+eave vent cw intake vent <br />system selected <br />112 x (Min. Sq. Ft. of NFVA needed) x 144fX = Min. lineal feet of undereave <br />STEP 2 vent needed <br />Instruction For Slots <br />After emulating the total length of Cottre Ridge Runner -ridge vent needed, <br />determine the necessary slot opening required. <br />Notre: It Installing on an existing rool, remove the cap shingles irom the ridge. <br />Roof$ without a ridge board: lout an opening along the ridge, Y" on each side of the <br />root ridge (Figure A). <br />Roots with a note board: Cut an opening along the ridge, 1%" on each side of the roof <br />ridge (Figure 8). <br />Note: Maximum slot openly is S�", wide, <br />Mark oft and art the slot opening, making store that the ends of the opening stop at <br />Walt 91 from any end walls or trip Wersectfons and 12" from chimneys (figure C). <br />Where short ridges (dormers, ridge intersections) ate used, mark and Gut the slot <br />maidiag sure that the 00 of the opening stops at least 12" from the ridge intersection <br />(Figure D). <br />20'x 11 1 2" Roll <br />'SFr <br />E <br />No Ridge Board <br />1 i <br />'{ e <br />- <br />With Ridge Board <br />1 <br />.. ._..., �4,�.,�,........,..,M.... `. 5� _ ......E <br />Lut <br />Y i <br />1 <br />Copyright C 2000 Windward Homes No portion may be copied or reproduced without the prior written permission of Windward Ifornes <br />Share drive W: Quality Control Checklist/Roofing (680)' Roofing Install Shingle Final GTOUp 680 rev 03-16-07 Tagc 3 of 4 <br />Windwardj Homes <br />PLAN © 2003 WINDWARD HOMES. ALL RIGHTS RESERVED <br />