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Help me find a solution!!
Old 14th October 2013
  #1
Gear Nut
 

Help me find a solution!!

Hey guys!

I'm installing my first layer of drywall on my inner leaf but the floor is quite uneven in places. For one sheet this has resulted in a large gap beneath the drywall.
Question is: should I redo the sheet and measure the distance to the floor every few inches and cut the board to match the uneven floor?
Or
Can I just pack it with concrete and maybe add caulk once dry?
As the pics show, even doubling the 10mm backer rod is not enough to fill the gap.
I do intend to level the floor later and seal the perimeter of this slightly raised floor to the drywall to create a second seal.
Attached Thumbnails
Help me find a solution!!-image.jpg  
Old 14th October 2013
  #2
Gear Nut
 

Oh yeah, here's the relevant pic of what I'm on about, uploaded wouldn't let me do it on the first for some reason & it has also flipped it for some reason too
Attached Thumbnails
Help me find a solution!!-image.jpg  
Old 17th October 2013
  #3
Lives for gear
 
boggy's Avatar
I use construction glue/filler/sealant (able to stick gypsum with ceramic or concrete), and which remain soft after drying, to seal all this gaps... as Bison PolyMax.


Old 18th October 2013
  #4
Gear Addict
 

I would use expanding foam let it harden, cut back then corking over then you know your air tight and I would scribe the second layer of boarding to the floor

(but I am builder not acoustic expert)
Old 18th October 2013
  #5
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boggy's Avatar
Quote:
Originally Posted by emearg_s View Post
I would use expanding foam let it harden, cut back then corking over then you know your air tight and I would scribe the second layer of boarding to the floor

(but I am builder not acoustic expert)
It is (acoustically) useful when this bond remain soft and elastic... but sealed for air circulation.
Old 19th October 2013
  #6
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Rod Gervais's Avatar
 

I agree that when you want a clean fit to an uneven surface the best approach is always a scribe..... they are not expensive.......

Set the sheet up on 2 blocks so it is level - pop a couple of tacks in the wall to hold it in place - scribe it to the floor - cut with a utility just outside of the scribe line and then use a rasp to file to the line - - once done set a couple of 3/8" blocks to hold it off the floor and install it.

For adjacent sheets simply fit tight to edge of the previous sheet and use whatever it sticks above the first sheet to set the scribe depth......

Once you get used to the process you'll zip through it like you have been doing it all of your life.......

Rod
Old 19th October 2013
  #7
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Rod Gervais's Avatar
 

If your walls are out of plumb you can use the same approach for the corners......

Rod
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