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Unread 06-04-2008, 08:09 PM   #1
kayakers2
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Unhappy Ready to lay hardibacker. Subfloor squeeking???

Hi all, need some advice. Removed vinyl layers and 3/4" particle board from our bathroom. Left 3/8" OSB on joists, it's in good shape. Added 5/8" OSB and nailed with 2" ring shank glued nails. Bathroom is small 5'X10'. Floor squeeks in area that is the walkway. Added 25 -30 3" screws and it is still squeeking. I plan to thinset in 1/4" Hardibacker and lay ceramic tile. Does the squeek mean the floor is moving and that my tile will crack? Should I be concerned with squeek? Thanks in advance!
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Unread 06-04-2008, 08:25 PM   #2
Ken
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Try stepping on the exact spot that makes the squeek, keep your foot there, screw around your foot every 2 inches.

Gotta get rid of that squeek.

Do you have access to the joists below?
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Unread 06-04-2008, 08:32 PM   #3
kayakers2
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It is an area about 4' long and 2' wide running lengthwise with a joist.

Underneath is another bathroom with stippled ceiling.

The squeeks were there before, I should have pulled up the 3/8 also, but when I took up the particle board in the living room and hall the new subfloor over the 3/8 took care of the squeeks.
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Unread 06-04-2008, 08:41 PM   #4
ceramictec
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Quote:
Does the squeek mean the floor is moving and that my tile will crack? Should I be concerned with squeek?
even the slightest could cause very small grout cracking.
you are going to want to try and find the way the joist
is running and nail the floor along the joist.
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Unread 06-05-2008, 08:33 AM   #5
kayakers2
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I have done some reading on your site, thanks for the information.

I think the problem is deflection. I used your calculator but am unsure what type of wood my joists are. If they are SYP or Douglas fir I am OK @ L/377 but unknown wood in good shape is L/289. How can I tell?

We have already purchased the granite to do our kitchen and will run into the same issues there. Unlike the bathroom I have access to the joists and adding 2X4's or 2X6's to the bottom of the beams will not be difficult.

My joists are 2X8 with a lenth of 11'.

I am going to try more screws in the bathroom to stop the squeek but am I wasting my time?

Thanks for your help, I should have read a lot more before starting this project.
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