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4. RE-ROOFING OVER SHAKE <br /> RE—ROOFING INTRODUCTION <br /> i <br /> TIve tom information uniess otherwise gmroed <br /> applies to Gerard Shaka as well as Tde. <br /> GENERAL INFORMATION <br /> Gerard Products are designed in a unique <br /> way that allows them to be installed over <br /> existing roofs without removing the <br /> MACHINE EDGE existing roofing material. This is achieved <br /> TOP FLANGE by building a new frame on top of the <br /> existing roof to which the Gerard product <br /> can be installed. <br /> This section will take you through a step- <br /> by-step process on how to re-roof with <br /> Gerard products over existing shake roofs. <br /> Although this manual details re-roofing <br /> / techniques, the general installation <br /> R process is similar for new construction <br /> details (see New Construction section). <br /> Each page will include:what the procedure <br /> is,the procedure area on the roof,purpose, <br /> MAIN WATER CHANNEand detailed illustrations showing the <br /> BACK LIP steps. Take note of all A waming signs; <br /> they pertain to critical information about <br /> the procedure. A similar step process Am I <br /> FACE applies when re-roofing over other types of <br /> roofs. See the 'Special Installation <br /> MEASURING RIBS Procedures' for specific details when re- <br /> NOSE roofing over other materials. <br /> Battens for re-roofing are: <br /> Counter-battens <br /> 1 X 4(25 X 100mm) <br /> Battens <br /> 2 X 2(50 X 50mm) <br /> It is essential to remember when installing <br /> Gerard panels that they are always: <br /> A.Layed from the top down <br /> B.Bent up at Rakes,Ridges,Hips,and <br /> Chimney/Roof-to-Wall areas; <br /> C.Bent down at Valleys. <br /> OVERLAP INTERLOCK D.Extended over the Fascia Build-up. <br /> MAIN WATER CHANNEL <br /> OVERLAPINTERLOCK <br /> MAIN WATER CHANNEL <br /> 2- 1 50M M) <br /> 2- I (50MM) <br /> J. <br /> Alai <br /> MUM GERARD Page 28 0 Gerard Roofing Technologies,2001-03-01 <br />