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-   -   How to even out a patched-in plywood floor (http://www.houserepairtalk.com/f13/how-even-out-patched-plywood-floor-15453/)

m2244 01-28-2013 06:16 AM

How to even out a patched-in plywood floor
 
Hello,

I am helping a friend with his bathroom floor. They had a leak, he cut out a 2-foot square section of the plywood, we patched it back in but the old and new plywood does not match up perfectly. In some spots the new plywood is too low. The flooring they are going to install is this thin linoleum stuff so we need to even the subfloor out fairly well.

What should we use? Is there something similar to sheetrock mud? I have seen stuff that you poor on but this is around a toilet so there are holes, I don't think that this liquid stuff would work. Is there soemthing you can put on with a trowel?

nealtw 01-28-2013 07:13 AM

http://www.dap.com/product_details.aspx?product_id=341

jmc0319 01-28-2013 07:23 AM

Quote:

Originally Posted by nealtw

I used this product for the same purpose and it worked really well.

m2244 01-28-2013 07:25 AM

Great. Thanks guys.

samfloor 01-29-2013 01:35 PM

Well I would use a cemetious based floor patch and then 1/4" underlayment grade plywood. Oh, I am an Armstrong certified vinyl installer. Been doing it for 40 years.

Jaz 01-30-2013 03:15 PM

Absolutely you need a cementitious patch and then an approved underlayment. Resilient flooring does not get installed over the subfloor.

Jaz

Wuzzat? 01-30-2013 04:05 PM

The cementitious stuff being brittle will fragment when flexed by the weight of people. Is this OK?

Since Linoleum is not brittle or inflexible, I'd put shims underneath the plywood if that area is accessible.
Glueing shoebox cardboard on top of the plywood and sanding flat and level may also work but you should topcoat the cardboard with some waterproofing, like polyurethane/varnish/old paint, then whatever Linoleum needs to have, to bond to.

Leveling within 1/16" is close enough, right?

samfloor 01-30-2013 07:22 PM

Quote:

Originally Posted by Wuzzat? (Post 82888)
The cementitious stuff being brittle will fragment when flexed by the weight of people.

Where would you get that idea? That's why you don't used gypsum based, it is brittle. Cementious based is not. I have been installing resilient flooring since 1973. Believe me, I have installed stuff that cost $50-$80 a sq yd, using cementious based with 1/4" underlayment grade plywood with no failure.

Wuzzat? 01-31-2013 10:11 AM

Quote:

Originally Posted by samfloor (Post 82905)
Where would you get that idea?

From here

ce·men·ti·tious
/ˌsēmenˈtiSHəs/
Adjective
Of the nature of cement: "a high-strength cementitious mortar that set within 1.5 hours".

I stand corrected.

Fredartic 04-16-2013 09:54 PM

Quote:

Originally Posted by nealtw (Post 82746)

Could it be used in mobile home that is not on a slab, but has been leveled last year? Is there a chance to crack in that condition?

Thanks


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