DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > Remove masonry nails




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Old 09-07-2009, 01:58 PM  
davesink
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Default Remove masonry nails

After some basement flooding, my wife and I pulled up the carpeting to reveal bare concrete. We'd like to either re-carpet or tile the floor, but when I pull up the wood border, there are large nails which protrude about 1/2" from the floor. I'm unable to pull up these nails by hand, so my question is, what power tool could I rent or buy that would either pull up these masonry nails with minimum damage to the concrete or cut them off so they're flush (or nearly flush) with the floor level. Thanks very much



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Old 09-08-2009, 07:47 AM  
kok328
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I'd cut them flush with a Metabo. Any attempt to pull them out or pound them in would result in cracking the floor.



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Old 09-09-2009, 02:39 PM  
yesitsconcrete
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don't be a woos - instead, grab up a decent siz'd demo bar & yank 'em out then ask how to fix the craters i like a dremel instead !
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Old 09-09-2009, 09:31 PM  
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Quote:
Originally Posted by davesink View Post
After some basement flooding, my wife and I pulled up the carpeting to reveal bare concrete. We'd like to either re-carpet or tile the floor, but when I pull up the wood border, there are large nails which protrude about 1/2" from the floor. I'm unable to pull up these nails by hand, so my question is, what power tool could I rent or buy that would either pull up these masonry nails with minimum damage to the concrete or cut them off so they're flush (or nearly flush) with the floor level. Thanks very much
By "wood border" do you mean the tack strips that were nailed down around the perimeter of the room? If so, then these nails aren't very long, and they DO pull out (sometimes easier, sometimes harder). You will see a chip in the concrete where you pull out each nail that's holding well, but these chips can be easily filled with any cementatious material, like a cement based floor leveler or even brick mortar with some adhesive painted on the exposed concrete and some adhesive in the mortar. Patching those tiny "craters" is the smallest problem.

It's very possible that those nails were driven in with gun powder charges. In that case, they may be a real fight to remove and cutting them off flush with the concrete might be the better way to go. If you could supply a pic, that would certainly help us to figure out what's going on, and what those nails are.

Cutting something off with a "Metabo" is like saying that you're going to cut something off with a Makita. Metabo is a brand name, like Porter Cable or DeWalt or Milwaukee. What I expect Kok meant to say was "grinder". That's a pretty general term, and there are different kinds of grinders, but it's a safe bet that he meant a 7 inch angle grinder. (Prolly didn't mean "bench grinder. )

If you have a hand grinder, you'll be able to buy metal cutting disks in any welding shop rated at 12,000 rpm or more. Those will allow you to BOTH cut the nails off and grind anything sticking up flush with the concrete. You can do the same thing with a larger 7 inch angle grinder, but it's a larger and heavier tool that requires that you hold it with both hands. You don't need that much power to cut a nail off, even a hardened steel nail, so if you're gonna buy a tool to do this job, I'd recommend a hand grinder. Just be sure to shop for the disks in welding shops where they have disks rated at the 10 to 15 thousand rpm your hand grinder will spin at. You don't want to put a disk rated at 7,000 rpm in a grinder spinning at 12,000 rpm. The disk could come flying apart and create a dangerous situation.

Both carpeting and ceramic tile are "forgiving" flooring materials. Your concrete doesn't have to be completely smooth before you can install either ceramic tile or carpet over it. He11, you can just about stretch carpet over a dead animal without having a "bump" show under the carpet.
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Old 07-09-2012, 12:22 PM  
Stephen900
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This is for anyone coming to this page with the same problem. First cut the nail head off as close as you can to the floor. I use a small bolt cutter with a thick rag covering the tool while making the cut. The thick rag keeps the cut head from flying around at a penetrating speed. Note well, wear good eye protection throughout this process. After cutting the head off you can pound in the remaining metal piece with a heavy hammer, I use an over sized ball peen hammer. This allows the floor to be as flat as possible. I am installing commercial homogenous vinyl on the floor and the vinyl would show any imperfection into the vinyl. Any dimpling of the floor will require cement patching.

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Old 07-09-2012, 01:59 PM  
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Using a 4" angle grinder with a metal cutting wheel is the quick and easy way to go. No damage to the concrete requiring repair, and not much of an effort to zip through the nail shanks (don't bother clipping the heads first, as that's totally unnecessary). I've removed literally thousands of nails/bolts this way in the last 40+ years, and it's always worked like a charm.

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Old 10-19-2013, 07:49 PM  
KasperCurmudgeon
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Default What about cinder block walls?

Link: question on masonry nails & cinder block walls.

http://www.houserepairtalk.com/f17/i...d-nails-16675/



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Last edited by KasperCurmudgeon; 10-20-2013 at 12:04 PM. Reason: linked to separate thread created to ask questions about masonry nails & mortar joints
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