What is behind the dry wall atop of the fireplace?

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Old 08-26-19, 05:15 PM
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What is behind the dry wall atop of the fireplace?

I am trying to hang a mirror atop of the fireplace, studfinder shows nothing behind where I want to put the two nails in, so I started to drill pilot hole, and felt resistance immediately after I went thought the dry wall, there is something behind, but how can I know what exactly that is? I am afraid I i am gonna break something. Any suggestions? thanks!

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Old 08-26-19, 05:27 PM
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Is that a real fireplace with a fire box ?

If yes..... ultimately there will probably be cinder block or some type of masonry behind there.
The sheetrock may just be attached to that block with some firing strips.

Nails will probably not be the best fastener to use. Since you have a hole drilled.... try tapping the nail with a hammer. Is it solid ?
 
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Old 08-26-19, 05:28 PM
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It uses gas.

I was wondering why studfinder did not pick up anything there?
 
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Old 08-26-19, 05:29 PM
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What is the white section we're looking at ?
Is it some type of wood ?

If the wall is perfectly flat there..... then the vent goes out the back thru the wall ?
 
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Old 08-26-19, 05:49 PM
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Do you mean the decorative frame? That is probably wood.

The wall is perfectly flat, and looks like the vent does go out thru the back of the wall.
 
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Old 08-26-19, 05:54 PM
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If that's wood your stud finder won't search behind it. You need to go up above the trim onto the drywall that is painted wall color. You might find studs up there.
 
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Old 08-27-19, 11:55 AM
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I just poked a small hole in the middle of the white wall, it is drywall painted with wall color.

Should I go get a endoscope and see if it helps? Or is there any other ways to find out?
 
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Old 08-27-19, 12:39 PM
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I managed to take two photos, seems like an another dry wall behind a dry wall?
 
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Old 08-27-19, 05:12 PM
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If that was a second layer of sheetrock.... you should be able to drill it easily.
If there is a gap between the two sheets of rock... then there is some type of firring strips between them .
If there is a gap..... try sliding a piece of coat hanger or other wire to each side until you hit something.
 
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Old 08-27-19, 05:37 PM
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There is no gap, immediately after the first drywall there is a yellowish brown paper like think material, then white stuff (calcium?)
 
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Old 09-02-19, 10:03 AM
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I'm no expert, but I think you're hitting a cinder block. I had the same situation when I hung my 55 inch TV above the fireplace. What I ended up doing was attaching a 1 by 6 horizontally to the firing strips (using screws) and then mounted the TV mount to the 1 by 6. I painted the 1 by 6 the same color as the wall so that it wouldn't be noticeable.
 
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