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-   -   Did I drill too deep? (http://www.diychatroom.com/f15/did-i-drill-too-deep-133841/)

harvest 02-15-2012 02:22 PM

Did I drill too deep?
 
I am re-modelling by basement and first step I took was to nail 2x4 on the basement's concrete floor. I tried tapcons, but because I found it hard to put into concrete I ended up using concrete nails (3" long) for almost 90% of the floor. Put a nail in every foot or so. When I was drilling a hole, I went 2" sometimes up to 3" deep into my basement floor and in some areas the drill went down real easy. Sometimes it was near walls, but more often where my basement was not leveled...It was like there was concrete for 1" or so and after that just air, empty space...I put a thinner longer nail in one of these holes to make sure that there was no mud underneath and did not find any sign of mud...Did I drill too deep? If yes, what are the negative effects of it? Anything that can be done now? I put felt paper before placing 2x4s on the floor.

My house is from 1950!

Thanks in advance for your comments!

joecaption 02-15-2012 02:28 PM

Who knows how thick that slab is or how it was pored.
Ever had water coming in that basement around the bottom of the walls before?

harvest 02-15-2012 02:37 PM

Quote:

Originally Posted by joecaption (Post 854286)
Who knows how thick that slab is or how it was pored.
Ever had water coming in that basement around the bottom of the walls before?

No! The walls look fine, no water coming in, no cracks or anything. Floor as well used to look good. What worries me is those holes with emptiness...The drill was going down so easy, not drilling anything, just falling down...
Thanks joe for your quick reply!

joecaption 02-15-2012 02:48 PM

Not going to be a big deal. The 2 X's spead out the load.

Beepster 02-15-2012 03:09 PM

Ramset, baby.

I spent too long drilling and using Tapcons. $30 got me the base Ramset and a box of nails and screws. Works like a charm. Not that that does the OP any good, just a product advertisement.

B

Daniel Holzman 02-15-2012 03:18 PM

I am a bit confused. You said you started out using Tapcons, but they did not work, so you switched to concrete nails. Why were you drilling holes for concrete nails?

harvest 02-15-2012 06:13 PM

Well, how could I insert a nail into concrete without drilling a hole first? I tried ramset as well, but since the concrete was too hard, ramset nails could penetrate very little the concrete. Tapcons were ok, but some of them won't get totally in to concrete (dust or shorter holes probably), so I ended up with concrete nails. It took me like 2 full days to drill holes in 425sq feet basement, but at least, I have stable 2x4s on concrete...I hope I haven't messed anything with so many holes and most of them a little deeper than they were supposed to be.

Daniel Holzman 02-15-2012 08:13 PM

OK, concrete nails by definition are supposed to be driven into concrete using a hammer. If the concrete is too hard to drive the concrete nail, then they should not be used. If your Ramset was not working, you might have had too low a charge. As I recall from my days using a Ramset, there was a .22 Ramset, not real good for hard concrete, and a .38 Ramset. As I recall, there were various loads for the .38, I believe the purple was a large charge, and when we used the .38 with the heavy charge and an appropriate nail, you could drive it into the hardest concrete on earth. I can't quite understand how the nails hold if you drilled a hole, I guess it is like predrilling for a wood screw, but this is the first I have ever heard of it being done.

harvest 02-15-2012 08:52 PM

Quote:

Originally Posted by Daniel Holzman (Post 854602)
OK, concrete nails by definition are supposed to be driven into concrete using a hammer. If the concrete is too hard to drive the concrete nail, then they should not be used. If your Ramset was not working, you might have had too low a charge. As I recall from my days using a Ramset, there was a .22 Ramset, not real good for hard concrete, and a .38 Ramset. As I recall, there were various loads for the .38, I believe the purple was a large charge, and when we used the .38 with the heavy charge and an appropriate nail, you could drive it into the hardest concrete on earth. I can't quite understand how the nails hold if you drilled a hole, I guess it is like predrilling for a wood screw, but this is the first I have ever heard of it being done.

I tried a ramset .022 with the biggest load possible (yellow) and it did not work. I drilled holes in concrete using bits of 5/32 inches, while nail diameter was 3/16". Probably, as you are saying, I should have tried a .38 ramset, but I got discouraged of that first experience with .22...Now you are making me wonder if those nails will ever keep 2x4s fixed into concrete for a long time :) Any comment?

ben's plumbing 02-15-2012 08:59 PM

hilty dx351 mean machine will shoot into 3/4" steel beam...and even the hardest concrete:yes::thumbup:

mae-ling 02-16-2012 08:40 AM

If your concerned use PLpremium or similar product to 'glue' them down as well.

md2lgyk 02-16-2012 09:21 AM

Please tell us the 2x4s are pressure treated. Otherwise, you've done a heck of a lot of work for nothing.

fixrite 02-16-2012 10:09 AM

don't use pressure treated in doors

harvest 02-16-2012 01:17 PM

First, I almost missed the importance of pressure treated wood, but reading more about its use I decided to go with regular heat treated wood...The guy at Home Depot explained that once in contact with humidity the pressure treated wood can be dangerous because of the chemicals used during its processing. I know that there are pros and cons for each, but why would you say that that work was done for nothing if no pressure treated wood been used?

Beepster 02-16-2012 01:32 PM

Quote:

Originally Posted by harvest (Post 855094)
...The guy at Home Depot explained

Your first problem was listening to him.

There is a reason most if not all codes call for pt boards in contact with the floor.

B


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