[Greenbuilding] Insulation fasteners

[bill.allen at verizon.net]

John,
I'm finally getting around to buying the #10 or #12, 7" screws I need. The bestmaterial store you referenced only sells the sheet metal point...very hard to hand drive into wood.
As you predicted, I'm having trouble finding a 7" flat head wood screw.
Any other suggestions on where to get these?
Thanks
Bill

-----Original Message-----
From: "John Straube" <jfstraube at gmail.com>
Sender: "Greenbuilding" <greenbuilding-bounces at lists.bioenergylists.org>
Date: Wed, 14 Nov 2012 15:53:46 
To: Green Building<greenbuilding at lists.bioenergylists.org>
Reply-to: jfstraube at gmail.com,
 Green Building <greenbuilding at lists.bioenergylists.org>
Subject: Re: [Greenbuilding] Insulation fasteners

We have tested up to 8" of foam (EPS, XPS is stronger) with #10 screws and furring strips. Works fine with siding ( safety factor of more than 10). 
3/8" lags is crazy: never need it. The foam provides a lot of the strength.
Check our buildingscience.com website or my book for more detail on how this works.  

Sent wirelessly from my BlackBerry device on the Bell network.

-----Original Message-----
From: Clarke Olsen <colsen at fairpoint.net>
Sender: "Greenbuilding" <greenbuilding-bounces at lists.bioenergylists.org>
Date: Wed, 14 Nov 2012 09:50:23 
To: Green Building<greenbuilding at lists.bioenergylists.org>
Reply-To: Green Building <greenbuilding at lists.bioenergylists.org>
Subject: Re: [Greenbuilding] Insulation fasteners

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