What's Holding Up The Drywall???

DetailHandyman

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.

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?

__________________
The cat box ain't gonna clean itself.

Dan_Watson

Well no one else has answered...but maybe adhesive?

BCConstruction

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.

DetailHandyman

Sounds logical.

Doesn't make it real easy to hang shelves though.

__________________
The cat box ain't gonna clean itself.

Victory Drywall

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

acetate198309

we adhesive the aluminum composite panel on the wall

FramingPro

probably by the walls cuz the walls help hold the ceilnig up

matt grisham

maybe furing chanel runing horasantel