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My wood floors in my living and dining rooms have 4 coats of polyurethane. This was done professionally about 5 yrs. ago. I want to give the floors a facelift by adding another coat of polyurethane. What are the steps for me to follow so I can do it myself? Thanks, Joanne

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This will dependa litlle on the type of Polyurathane that was originaly put down - single pack or two pack and if you have done any type of upkeep to it in the mean time. Some people like to wax there floors to give them shine and a deadly slip factor, if you have waxed your floor you need to remove this wax before youo go any further. Talk to a local chemical supplier to find a wax remover. If you have not waxed your floor this makes it easy.

Wash the floor with a solvent cleaner that contains no waxs or soaps - I use mineral Turpentine on clean rags.

Sand the floor with a hand sander (orbital, vibrating or belt your choice, I prefer to use a square vibrating sander or 8" Orbital) - you do not need a floor sander unless you want to remove all your PU and get back to bear timber. The process of sanding is designed to rough up the whole top surface so that a new layer of PU will adhear to the old PU. So use about a 80 gritt pad. to fine a sand paper will not give a good key for the new PU and to rouogh a paper may scratch to deep into your floor.
Note: if your original floor was stained you must be very carful not to sand all the way through the PU as the timber underneath will show through as a differant colour.

Dust off the floor with a clean broom to remove the bulk of the dust then use Methalated spirits on clean rags and completly clean the floor. You are now ready to start applying the PU as per the manufacturers specifications.

Other things to note:

1) I always wear socks when cleaning back the floor for the last time as oil from your feet and hands can transfere onto the floor and cause small patches were the PU does not adhere properly.

2) After the reccomended drying time I always insist that my clients wait an additonal 24 - 48 hours to allow the PU to fully harden before they walk on it or move furniture. A lot of the PU manufactures seem to cut down there drying times to make there product more appealing to busy market.

Hope this helps.

Posted on Jun 26, 2009


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Equlvalent expression

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