[RE-wrenches] L feet no flashing in shingle roof

[Benn At DayStarSolar]

I haven't read up on the mentioned structural screws yet, but do they specifically state that they can be driven "without" a pilot hole?  What is the justification and how are they different so that they won't cause a board to split under pressure?
Does anyone have some good info on this?

benn
Sent from a 'smart' phone, with tiny keys. Please excuse shortcuts and typos. 

On 2012-07-03, at 3:53 PM, "David Brearley" <david.brearley at solarprofessional.com> wrote:

> +1 on the use of structural screws. We ran an article about lag screws a couple years ago:
> 
> http://solarprofessional.com/article/?file=SP3_4_pg70_Shelly
> 
> One of the things that surprised me when I read this manuscript is how variable lag screws are in terms of construction and quality. Besides the convenience of being able to drive a structural screw without a pilot hole, the engineering specs are likely better documented and the manufacturing tolerances are probably tighter as well. 
> 
> FWIW: I think that using unflashed attachments in these litigious times is unwise. It's not consistent with best practices in the construction industry. It does not meet building codes. It violates the roof warranty. It makes your competition look good. 
> 
> We ran our first article on this topic 4 years ago, in our inaugural issue of SolarPro magazine:
> 
> http://solarprofessional.com/article/?file=SP1_1_pg72_Fain
> 
> The industry has come a long way since then, both in terms of awareness and in terms of off-the-shelf flashed attachment options. There are so many quality flashed attachment solutions to chose from now that I'm not sure why anyone would knowingly expose themselves to a possible construction negligence claim.
> 
> Drive straight,
> 
> David Brearley, Senior Technical Editor
> SolarPro magazine 
> NABCEP Certified PV Installer ™
> david.brearley at solarprofessional.com
> Direct: 541.261.6545
> 
> On Jul 3, 2012, at 4:11 PM, Garrison Riegel wrote:
> 
>> The EcoFasten GF1 flashing is easy to install on a retrofit and will not necessarily add any height to the rail.  If you do need to trim the flashings installed around the skylight, then I would recommend adding sealant to these penetrations.  We ditch the included lag and use a 5/16” GRK RSS (self tapping structural screw).  The combination works great and does not require a pilot hole.
>>  
>> RSS:
>> http://www.grkfasteners.com/en/RSS_1_2_information.htm
>>  
>> GF1
>> http://ecofastensolar.com/pdf/GF1%20Cutsheets.pdf
>>  
>> Best,
>>  
>> Garrison Riegel
>> Project Manager
>>  
>> Solar Service Inc
>> [p] 847-677-0950
>> [f] 847-647-9360
>> www.solarserviceinc.com
>>  
>> NABCEP Certified Solar PV and Thermal Installer™
>>  
>>  
>> “There is no room for flashings. The L feet will go very close to the skylights and the flashing would hit the edge of them. Plus there is an existing array that was done by another installer that is done with L feet only. The new array would be higher.”
>>  
>>  
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