We replaced 12" square vinyl tile with 3/4" hardwood flooring on the stage
at my church recently. After it was sanded and cleaned off with tack cloths
( almost 1200 sq/ft ... that was fun! ), they put down two coats of stain
over two days, and then let it dry for about three days before I put down a
sanding sealer. After a light sand, I put down what I thought was a good
coat of poly. The can says ~600 sq/ft per gallon, but I only used about 1
gallon and three quarters. Another light sand, and the second coat was just
over two gallons.
Now for the question to which no one can seem to agree on an answer ... How
many additional coats should be put down to provide sufficient protection
against wear and tear? One camp says that two is plenty, especially if we
ever have to repair the floor - they don't want to have to sand through more
then two coats of poly to be able to repair the floor. The other camp
thinks 4-5 coats total is more appropriate to keep us from having to sand
all the way down to bare wood to repair the floor.
Personally, I don't think that two coats provides enough protection, and we
should put down another two coats. On the other hand, I don't want to go
overboard, especially since my back and I are currently not on speaking
terms. So ... how many coats does it take to protect a floor, realizing
that no matter how many coats you put down, it's a stage floor that's going
to be used, and it will be scuffed up, and people will drop things on it and
drag things across it?