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Fastener size and spacing for a 2X picture frame window frame on a house with foam insulation

artisanfarms | Posted in General Questions on

The question is in the title.  I’m looking for fastener recommendations for the 2X picture frames I will be installing on my ranch home rehab.  The house will have 2 1/2″ polyiso on top of the OSB sheathing and a 1″ rainscreen for the rough sawn board and batten siding.  

What are recommended fasteners – both size and spacing to mount the 2X picture frame I will be using to attach the windows?  The articles I checked on this site, don’t seem to mention this detail, they just reference using screws.

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