Tom, Thanks for the information. Specifically which Ruscoe product would you use on shingle or concrete roofs? We do a lot of flat concrete roofs with wedge anchors and SnapNRack standoff bases. Ruscoe has a wide range of products, can you identify the best one you would recommend?
On Mon, Apr 14, 2014 at 9:58 PM, Tom Lane <[email protected]> wrote: > Education time , Sikaflex is NOT recommended by the manufacturer to use on > asphalt shingle roofs , no polyurethanes are recommended for asphaltic > materials and they are not rated above 170 F . Likewise no silicone > sealants should be use as they DO NOT STAY ELASTOMERIC . PLEASE read the > product specifications of the materials you are using . They must stay > elastomeric from 40 F below zero to 200 F or they are not acceptable . > Rubber butyl nitrile like Ruscoe www.ruscoe.com are the only type of > sealants that have UV resistance and stay elastomeric and are rated from 40 > F below zero to 200 F . Do not argue against the product specifications on > the product data sheets . All L feet and flashings should use a sealant , > if you think you can use flashings without a sealant - GOOD LUCK - you > will need it on a rain pouring down a roof with a hard rain blowing up the > roof . Your job is only to stop leaks and keep high winds from blowing the > PV modules , solar hot water collectors , o > r pool collectors off the roof . You do not create the solar electric > energy or the thermal power . The roofing work is solely to install the > product to code and under the PRODUCT SPECIFICATIONS of the roof materials > you are using to prevent damage to the roof and the contents below . Stop > using urethane sealants and silicone sealants period in harsh environments > on this planet where they are not specified by the manufacturer on the > product data sheets would be a beginning . Only lead or copper , aluminum , > marine grade stainless steel flashings for piping will last for 100 years . > Aluminum and copper flashings must be used with the appropriate materials . > Metal roofs sometimes require EDPM rubber flashings for pipe penetrations > ,BUT , it must be protected from direct UV light to last 100 years . Gator > Tom PS : sealants should be under the > L feet or U channels or flashings on the roof AND over the top of the lag > bolts , j or hook bolt , or all thread rod bolts nuts . > > > Sent from my iPad > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > -- Chris Mason NABCEP Certified Solar PV Installer™ Solar Design Engineer Generac Generators Industrial technician www.cometsolar.com <http://www.cometenergysystems.com> 264.235.5670 869.662.5670 Skype: netconcepts
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