[Greenbuilding] fastening a subfloor over foam over a slab

Bob Klahn Home-NRG at dnaco.net
Wed Jun 1 19:22:36 CDT 2011


Can't claim the insight as original but, how is a VB still a VB once 
you've punched it full of holes?
(Just nit picking - on the side of goo.)
Bob Klahn

On 6/1/2011 2:39 PM, Alan Abrams wrote:
> so an important question is mechanical versus adhesive fastening.  
> Screw vs Goo, if you will.  Without being responsible for the 
> installation personally, I am more comfortable spec'ing mechanical 
> fastening.  I'm thinking to fasten the lams of plywood at 8" centers 
> EW, and secure it to the slab with flathead tapcons at 24" OCEW, with 
> 3/4" embedment.
>
> A remaining question is resistance of the foam to insect infestation.  
> This suggests a rugged vapor barrier over the slab--as for insect 
> supression as for vapor migration.  (in this case the basement is well 
> drained, with little risk of significant bulk water anywhere.)
>
> AA
>
>
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