Reply To: 1926 series 80

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The 1×8’s you have may be the original northern white ash. I suggest using waterproof plywood. Paint the plywood with a waterproof black paint. Over the plywood place a layer of 110# black roofing felt. Over this goes the running board cover of pyramid aluminum. The correct pyramid aluminum is available from Restoration Supply Co., 15182B Highland Valley Rd., Escondido, CA – telno 800-306-7008