[RE-wrenches] Trend away from roof flashings???

[frenergy]

OK, I'll stick my neck out.  We've done very few flashings on comp for 
the last 18 years or so, using (first) the highest quality polyurethane 
caulk we could find.  However, for the last 10 years we've been using 
Geocell 4500 which states on the tube that it is compatible with 
asphalt/comp shingles.  For a variety of reasons not related to leaks, 
we've had to pull some of these L-feet to which we saw there was a 
bond/seal to the shingle like it had been welded to it.  The Geocell was 
still extremely flexible.

             Whenever (infrequently) there's a chance we look for stains 
on roof decking and rafters if we're in the attic of an old install.  Of 
course there is the need to think about what you're doing when your 
applying the bead with regard to location and quantity of caulking and 
be conscious of torque applied to the lag bolt, being sure you get some 
caulking squeezed out the side of the L-foot, covering the head of the 
lag bolt with caulk also. Its a bit of an art we take seriously.  So far 
as we know, no leaks with thousands of L-feet.

             Oh, and flashings are good too, but are not perfect.

Bill

Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net

On 4/21/2021 7:40 AM, Jeremy Coxon wrote:
> I’m interested in what the group has to say about the trend, by the 
> racking manufacturers, away from the use of flashings for asphalt/comp 
> roofs?  We have long used SnapNRack flashings with much success.  I 
> especially like the fact that the penetrations are fully flashed and 
> do not rely on sealant.  I am NOT a fan of their new raised cone/epdm 
> gasket flashing.  There are a number of these raised cone flashings in 
> the marketplace and it’s my experience that they don’t hold up to the 
> test of time and I wonder what the roofing manufacturers have to say 
> about this.
>
> I see that Unirac, SnapNRack and others are now offering basically a 
> sealed L-Foot which is essentially where we were 15-16yrs ago and met 
> with a lot of opposition from the roofing industry.  Just interested 
> to hear what you guys are using these days on asphalt shingle roofs 
> for reliably dry attachments?
>
> Best Regards,
> Jeremy Coxon NABCEP # 091308-21
> MWBE Certified
>
>
>
>
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