Patching Double layer of wallboard

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  #1  
Old 11-06-17, 11:37 AM
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Patching Double layer of wallboard

WE have ordered new quartz countertops which will be installed on exisiting cabinets. We have now demo-Ed the backsplash tile to get ready -- the tile couldn't be removed, so the tile and walls below th cabinets been removed to the studs. We found that There are 2 layers of wallboard underneath. In order to patch this, do we need to install 2 layers to patch? Or can we attach wood to the studs and just use one layer in the patch? Or some other fix?Your help is most appreciated.
 
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  #2  
Old 11-06-17, 11:46 AM
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Two layers can occur when a new layer is just added instead of removing the old. Or in some cases it is required as a fire barrier, but I've never run into that in a kitchen. Maybe the pros will know why it is there.

In either case, 2 layers or wood shims plus one layer you may need to match the thickness, electrical boxes, corners, or if butting to existing double layer. Drywall comes in several thicknesses and edges are tapered so measure where it is full thickness.

Bud
 
  #3  
Old 11-06-17, 11:48 AM
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Can't see what you see to know. How thick were the layers? Can you see any reason there needed to be two layers?
 
  #4  
Old 11-06-17, 12:32 PM
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1/2" per layer. No reason for two that we can tell.
 
  #5  
Old 11-06-17, 12:36 PM
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Thank you. We are pretty sure the previous homeowner did the kitchen himself in 1978, so I assume he just dry walled over the previous layer. Yes, matching thickness is the challenge since it butts up to the exisiting layer. The electrical boxes also will be a problem. We will try shims.
 
  #6  
Old 11-06-17, 01:08 PM
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Pretty easy to spend 30 minutes at a table saw and turn a small stack of 2x? into a stack of 1/2" material. Then some glue and a finish nailer and the thickness issue is history without dealing with a second layer.

Of course it sounds easy from where I'm sitting.

Bud
 
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