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 Post subject: Squeaky plywood floor
PostPosted: Thu Aug 23, 2018 8:44 pm 
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I have put 9mm ply down on top of T&G softwood flooring to take a floated engineered floor. The ply is screwed at 200mm centres.

The floor is very squeaky anyone got any ideas how I can get over this?

The engineered floor has not been laid yet

Thanks in advance

John


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PostPosted: Thu Aug 23, 2018 9:57 pm 
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Assuming it wasn't squeaky before, what size screws did you put the ply down with?

Did the ply go down well? i.e. no gap created between the ply and original floor when the screw went through.

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PostPosted: Fri Aug 24, 2018 1:36 am 
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ayjay wrote:
Assuming it wasn't squeaky before, what size screws did you put the ply down with?

Did the ply go down well? i.e. no gap created between the ply and original floor when the screw went through.


Hello thanks for replying. I used 25mm screws as the t&g was 18mm thick. Floor went down with no problems.
The t&g was flat to start with I was using the ply as the t&g was running in the same direction as the engineered flooring i want to lay.
I also wanted to raise the surface slightly to meet a tile floor

I am pretty sure their was no squeaking before I laid the ply

I wondering if putting a screw through the ply, t&g and into a joist might help


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PostPosted: Fri Aug 24, 2018 6:00 am 
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I'd say the screws need to be longer and into joists as you say

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PostPosted: Fri Aug 24, 2018 6:52 am 
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Ktuludays wrote:
I'd say the screws need to be longer and into joists as you say

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Thinking about it overnight i am wondering if the ply pushed up slightly when the screw went down. Same sort of thing when you dont counter sink.


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PostPosted: Fri Aug 24, 2018 7:03 am 
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johnfarris wrote:
Ktuludays wrote:
I'd say the screws need to be longer and into joists as you say

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Thinking about it overnight i am wondering if the ply pushed up slightly when the screw went down. Same sort of thing when you dont counter sink.
Wouldn't hurt to back it off and rescrew it then

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PostPosted: Sat Aug 25, 2018 9:53 am 
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What type of screws have you used, and what size? For example short standard drywall screws (up to about 30 or 35mm) often won't sink properly into thin plywood whilst short thick (say 5.0mm or #10) woodscrews tend not to do well either. Hilti for one have introduced a redesigned screws with a triangular head shape rather then the bugle head preferred for plasterboard. These screws are designed to hang thin plywood onto metal stud which is to be overclad with whiterock (as in kitchens, bathrooms, etc), sink properly and pull up well even in timber to timber joins. I'll post the exact part number and photos when I get back to work on Tuesday as a reference. There also a number of wood screws which feature self-drilling head countersink designs and a counterclockwise rifled part at the top of the shank which are better for pulling down plywood flooring - I'm currently using stuff by Bryson (trade ironmonger) but there are other types out there such as Floor-Tite

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