[RE-wrenches] Subject: Re: to flash or not to flash

[Jason Andrade]

I wouldn't install a comp roof system without the flashings myself, I am in
Northern California and the extreme weather both heat and cold are murder on
roofing.

Jason

West Coast Sustainables
Jason Andrade
C-46# 974647
(530) 410-4745 Cell
(530) 241-7498 Office
(530) 348-5301 Fax
Jason at westcoastsustainables.com
-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
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Sent: Tuesday, August 25, 2015 6:42 PM
To: re-wrenches at lists.re-wrenches.org
Subject: RE-wrenches Digest, Vol 8, Issue 294

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Today's Topics:

   1. Re: to flash or not to flash (Daniel Young)
   2. Re: Schneider XW battery monitor
      (Jarmo.Venalainen at schneider-electric.com)
   3. Re: clear sealant recommendations (James Rudolph)
   4. Re: to flash or not to flash (frenergy)


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Message: 1
Date: Tue, 25 Aug 2015 17:19:30 -0400
From: "Daniel Young" <dyoung at dovetailsolar.com>
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] to flash or not to flash
Message-ID: <013601d0df7b$bb6b3080$32419180$@com>
Content-Type: text/plain; charset="utf-8"

Figured I would dig through the responses to this list topic since I posted
it as a poll, of sorts.

 

My final count was: 10 votes to flash, 4 votes not to flash.

 

Those who read all the responses probably know there are a few on either
side that would be OK with the other option.

 

I?m still on the flashing side of things, though I might consider letting
the client have a choice. If I explain the differences, and show them the $
difference, they can help make the decision (read that as? ?take some
liability off of me J?). We do that now with US vs non-us made solar
modules. It?s not the same type of comparison here, but at least if the
client really wants a lower cost, they know how they?re getting it, and
future calls from the client should get tempered by the knowledge that they
chose the attachment method.

 

Some really good points were raised on this topic, thanks to everyone who
participated.

 

With Regards,

 

Daniel Young, 

NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Jason Szumlanski
Sent: Monday, August 10, 2015 5:42 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] to flash or not to flash

 

Although my mind is kinda' made up, this thread has really got me thinking
and researching. I scoured the NRCA manual, which does not really define
"penetration," but it does say in the shingle manual:

 

"Penetration Flashings: There are many small penetrations that need to be
flashed into asphalt shingle roof

systems, such as vent pipes, exhaust vents, exhaust fans, furnace or water
heater flue pipes, electrical standpipes and others."

 

There is also a graphical figure showing these various penetrations. The one
thing these all have in common is that there is a substantial air gap cut
fully through the roof plane.

 

It occurred to me that ridge caps and vents on shingle roofs use exposed
fasteners to nail or screw them to the decking. The NRCA manual says about
this:

 

"Exposed fasteners should be sealed with elastomeric sealant or asphalt roof
cement on the last ridge piece of a run, at the intersection of hips to a
ridge and at the intersection of a ridge to another plane."

 

Also read the Snow Guard section for metal roofs, which allows attachments
sealed to the flat part of the roof pan with sealants.

 

Until the manual specifically addressed the solar "attachments" and
"fasteners" we are debating about, it's open to interpretation.