This is actually an easy one. Clean the roofing well where you plan to penetrate and use standoffs that you like secured into the structure and then cut a "patch" out of a new piece of tourchdown at least 6" larger then your standoff base on all sides, cut a hole for your riser and melt the surface of the existing tourchdown in the area of patch contact , then press your standoff into the hot tar and shoot your lags through the melted tar for a good seal. Then "flow" the back side of the patch and lay it in fusing the roof and patch together, you should see a flow of tar on all edges, this edge detail is most critical and I'll often "weld" this seam again and look for a good flow and monolithic bond. For small areas like this often a conventional plumbers torch will suffice. I've also cut thin strips of the tourchdown and used them like welding rods for touch ups and assuring a good bond between the patch and the riser. Remember - the devil is in the details! Wear thick lea ther gloves that you'll throw away after the job or you'll burn you hands big time!
-jeff >From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative >SOLutions ____________________________________________________________ Small Business Tools Learn how to save time and money. Click to find what tools your business needs now. http://thirdpartyoffers.juno.com/TGL2131/c?cp=VEv_SAAk23-PvXIR5D6_lwAAJz3wjMeYFQQEj9ak8QigdzdLAAYAAAAAAAAAAAAAAAAAAADNAAAAAAAAAAAAAAAAAAARMQAAAAA= _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & 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
