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Old 04-01-2012, 09:39 PM   #1
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Screwing in existing subfloor that has nails?


My OSB subfloor is nailed down every few inches. It's about twelve years old and I'd like to screw down the OSB before I lay my flooring down.

Is there a proper way to do this?
Am I supposed to remove the existing nails first (how?).
Or do I just add screws every so many inches, or does that weaken the floor by having too many holes in it?

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Old 04-01-2012, 10:06 PM   #2
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Screwing in existing subfloor that has nails?


How thick is this subfloor? Why do you think it needs screwing? It's far better to use screws then nails, just wondering.
Not going to hurt it to screw it down. Just add a screw between the nails that are there now. I use ceramic coated decking screws with an impact screw gun.
The least expencive one to buy is a Ryobi, 1/2 the cost of any other brand and the batterys are aslo about 1/2 as much. I've been using one for years and it's a very handy tool.

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Old 04-01-2012, 10:14 PM   #3
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Screwing in existing subfloor that has nails?


What kind of flooring? I screwed mine down, before my new carpeting, because I had some squeeks. I put 6 screws in the field and 8 on the seams. I also made sure all the nails were set below the level of the subfloor. If you are putting down tile you may need to add more screws or an additional underlayment.
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Old 04-02-2012, 03:58 AM   #4
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Screwing in existing subfloor that has nails?


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Originally Posted by packer_rich View Post
What kind of flooring? I screwed mine down, before my new carpeting, because I had some squeeks. I put 6 screws in the field and 8 on the seams. I also made sure all the nails were set below the level of the subfloor. If you are putting down tile you may need to add more screws or an additional underlayment.
Thanks!
I'm putting down bamboo flooring. The regular thickness, not the thinner one.
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Old 04-02-2012, 04:45 PM   #5
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Screwing in existing subfloor that has nails?


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Originally Posted by joecaption View Post
How thick is this subfloor? Why do you think it needs screwing? It's far better to use screws then nails, just wondering.
Not going to hurt it to screw it down. Just add a screw between the nails that are there now. I use ceramic coated decking screws with an impact screw gun.
The least expencive one to buy is a Ryobi, 1/2 the cost of any other brand and the batterys are aslo about 1/2 as much. I've been using one for years and it's a very handy tool.
Sorry I missed this post somehow.

It's ~3/4" OSB.
I use Ryobi also.
I want screws to ensure a solid subfloor that doesn't squeak or move.
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