Getting back to the flashing aspect of this thread, the comment about improperly installed flashings doing more harm than good and the general comments about L feet straight to the roof…
Yes, if you install ANYTHING wrong it's counterproductive but if you read the instructions and use common sense then flashing is a no-brainer. L feet straight to the roof not only voids roof warranties, but they also violate ALL roofing best practices and it makes our industry look bad. No roofer or roof manufacturer would ever hold a warranty on a roof with just L feet attached to it. We wouldn't want a roofer making electrical connections or designs on a PV system without the right training so why would we want to violate their standards when we penetrate their roofs? Ryan On 02/07/12 4:40 PM, "m...@hurshtown.com" <m...@hurshtown.com> wrote: My 18V Milwaukee cordless hammer drill has no trouble driving a 5/16" lag into anything I've ever encountered. If you put the lag anywhere near the middle of the rafter it won't split. If it splits, it must be some cheap stuff from Home Depot. Only an engineer with no practical experience would insist on a pilot hole and the resulting reduction in holding strength. I'm assuming the IBC consists of a bunch of bureaucrats that value control over common sense. In this instance flashing offers no benefit, and may even be counter-productive if incorrectly installed and it causes rain to collect under it. My experience is in northern Indiana where it does rain and the wind does blow. (Record 91 mph winds last Thursday.) Less severe weather than Michigan, but close. I use the best silicone caulk Menards has to offer. I've never worried about compatibility. It definitely won't dry up and crack away like the black roof cement some swear by and insist on. 15+ year old silicone caulk is yellowed a bit but that's the only change. If the silicone and shingle aren't getting along, I've never heard them complain. Mark (Disclaimer: Portions of the preceding are the opinions of the author.)
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