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Discussion Starter · #1 ·
My knowledge is a lot lacking in the commercial construction area, so this has me stumped.

I was attempting to re-secure a cantilevered countertop to the wall in our local welfare office. I notice 18 bazillion drywall anchors pulled out of the drywall. Of course, I'm wondering why no one just screwed into the studs.

Oh...because there aren't any!

I cut a 3' wide notch horizontally across the wall to see what's in there. There is only drywall laid over 1-1/2" of foam board over block walls. This counter is near a wall corner, so I cut an opening in that...no wood, no metal, just block. :blink:

So how is the drywall being held up?

I'm thinking of cutting out a relief in the drywall/foam sandwich and wedge anchoring a ledger board to the block so I can attach this counter. Any better ideas?
 

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I don't know if they have this system in the US but british gypsum had a system that sounds like what your talking about. My Uncle had some office partitions done by a company and I'm 99% sure it was a british gypsum wall system and it also had a foam center. But it was double sided and not just single.

This is all i can find that looks like what he had but his was double sided.



 

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Possible answer

The foam may be held in place by Z furring installed horizontally. Installing horizontal framing members helps when standing up your sheets of drywall.
 
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