[Greenbuilding] Insulation fasteners

[George J. Nesbitt]

I'm about to screw through 4-1/2" of polyiso, I can only find 6" screws 
affordably ($13/100ea), longer screws are $1ea. Sources & prices for 6"+ 
#10 screws?

On 11/14/2012 7:53 AM, John Straube wrote:
> 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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-- 
George J. Nesbitt, Environmental Design / Build, Building Performance 
Contractor HERS I Verifier & HERS II Rater, GreenPoint Rater new & 
existing SF & MF, CABEC CEPE (Certified Energy Plans Examiner), 
Certified Passive House Consultant, BPI Multifamily Analyst, 
www.houseisasystem.com, (510) 655-8532 office, (510) 599-5708 mobile