I have an oak hardwood floor which I sanded with 24 grit paper ONLY.
The idea was that I knew the floor was going to take a lot of abuse and
I wanted to give it a look which could withstand this abuse. The
trouble came when I went to put down polyurethane. The lambs wool
applicator hung on the flooring and pulled out applicator fibers. I
was able to solve this problem by applying a thicker layer of
polyurethane which lubricated the applicator. I ended up using 4.5
gallons for only 750 ft^2 of flooring (first coat). 4.5 gallons should
coat 2250 ft^2 of flooring. I just finished the application about two
hours ago. Since I applied this coat so heavily am I likely going to
have any problems? If so what is the best thing I can do to fix the
problems which I just created? I am also afraid that it may be uneven
since it was so heavy. What applicator should I have used if not lambs
wool for what I was trying to accomplish? How many hours should I wait
for the next coat if I don't want to sand (normally I would wait 16 or
Thank you for your time,
I sanded with 60 grit and I came across a similar type of problem. I
had to brush on the poly, it took a while.
There's nothing wrong with a good thick coat of poly... you haven't
screwed anything up too much yet and you shouldn't feel bad for having
attempted something a bit unorthodox in order to receive what you
perceived as a better result. If it weren't for this line of
thinking, we'd still be in the stone age. (seriously, someone thought
that combining copper with another metal may make a better metal, hence
What you may consider doing is sanding the poly though... maybe with
150 grit... just a quick once over to knock down the tough spots.
This will leave a 'white" finish, but don't worry...as soon as you
apply the next coat of poly it will make it clear again. Try in a
small area if you don't believe me.
If you apply too thick a layer of poly, you can get "orange peel"
texture...which kinda looks lousy, but it does have considerable more
traction when wet! you can sand orange peeling in poly down with 150
grit very very easily and it will look super neato when you're done.
If you've got any lamb's wool stuck in the poly, you may have to knife
and plier it out. I had an issue with hair like that once. Who
would've thought there would be that much hair in a house! Gosh.
Oh, it's gonna take forever to dry. I use Minwax fast-drying poly,
and it takes overnight just to get tacky then by about the next night
it's semi dry. NEVER EVER sand poly that hasn't completely dried.
When poly (or any other oil-based finish) dries it exhibits an
endothermic reaction, this means that as the molecules strengthen their
bond they produce heat and when it's flat on a surface the heat's got
plenty of place to go without buildup, but if you sand a floor and all
those little pieces or poly are piled up, the increased surface area
will cause much more heat much more quickly and it won't have much
place to go...leading to a flame!
Take your sanding dust outside, put it on concrete or soemthing to dry.
DO NOT pile it up, and never ever leave your sander's dust catcher
full of the stuff, or the floor you just finished will just become
It will eventually dry and harden. I have no idea of the time but I'd wait
a few days, maybe even a week before doing anything. I'd also thin out the
next coat so it will self level a bit better. Depending on how rough it is,
you may need a couple of coats like that.
I'd have thinned and brushed on the first coat to act as a sealer/smoother
for subsequent coats.
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