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Old 07-09-2015, 10:50 PM   #1
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Underlayment to replace 5/8 particle board


I am remodeling the kitchen in a 40 yr old house we are moving into.
Currently has 5/8 4 ply sheeting grade plywood subfloor. in great shape. 5/8 particle board underlayment, sheet vinyl flooring.

I plan to go back with a good quality sheet vinyl again.

I HATE particle board. It has caused problems in our current home any time the inevitable leak occurs.

SO, I removed the baseboard and cabinets (getting new cabinets) and took up all the 5/8 particle board in the kitchen and breakfast nook.

Now I need replace it with something with good moisture resistance.

Staying with 5/8 would be good to match the other joining floors. I could do 3/4 as well if it added any positive value to the final results.

So, what to use?

Thanks
TD
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Old 07-09-2015, 11:14 PM   #2
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You could go back with 5/8 plywood and 1/4" underlayment grade ply on top of it to give a smooth floor for vinyl.
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Old 07-10-2015, 07:51 AM   #3
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Make sure that plywood is subfloor rated.
It will be exterier glued and all voids filled.
NO LOUON plywood for underlayment!!
When laying the underlayment make sure the seams do not line up with the seams below, do not use any glue, needs to be attached every 4" on the edges, 6 to 8" in the field.
The fastest easiest way to do it by far is with a narrow crown pneumatic staple gun.
That way you do not have to go back and fill all the hammer damage.
All seams and flaws need to be filled with non gypsm filler.
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Old 07-10-2015, 09:38 AM   #4
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Would this be good?
BC 5/8. suitable for underlayment it says.

http://m.homedepot.com/p/19-32-in-or...135/100007300/

I understand about offsetting the seams from the ones in the subfloor and also the fastener density. I was planning on screws but could look into renting a stapler...

It had 15lb felt under the particle board before. Should I do that or something else again? Or is it even necessary?

Can you recomend a specific filler. Years ago I had trouble with some discoloration on a floor using Rock Hard putty under some cheap vinyl to fill a couple defects.

Thanks
TD
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Old 07-10-2015, 02:58 PM   #5
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No need for felt.
DO not use screws it will leave humps.
8D ring shanks for the subfloor.
If you have a compressor buy a stapler instead of renting. You can buy a cheap one for less then $50.00. Only needs a small compressor to run it.
http://www.homedepot.com/s/narro%252...2520gun?NCNI-5
That plywood will work.
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Old 07-10-2015, 03:26 PM   #6
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Thanks all!
Yes I have a compressor.
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