Carriage bolts work great for this. Smooth head.. On Jan 12, 2016 8:11 AM, "Eric Kuhnke" <[email protected]> wrote:
> Rubber mats are almost always required when on a membrane roof. Not used > if on gravel/rocks. Please no protruding bolt heads, the bottom of a nprm > needs to be FLAT. > > roofs like this: > > > https://www.google.ca/search?q=white+membrane+roofing&num=100&prmd=ivsn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiMgba8x6TKAhXGLmMKHRVGAgcQ_AUIBygB&biw=360&bih=559&dpr=3 > On Jan 11, 2016 10:37 AM, "Chuck McCown" <[email protected]> wrote: > >> If the mount has the head of a carriage bolt coming though on the bottom, >> will this be a problem? Now smooth does the bottom want to be? Are weld >> beads OK. >> >> Do you always use rubber mats under them? >> >
