Remove/flatten Quickset from OSB for Overlayment

[eduncan911]

Hello all!

I am removing tile that was placed directly on OSB. It's left behind a lot of quickset, which with the OSB is kind of tearing up various layers when trying to chisle it off.

The goal is to install radiant floor heating by using a "sleeper" method which basically layes down 5/8" wood strips on top of the OSB, with channels that run down to the OSB that the hoses snake around in.

IOW, I don't need to re-attach tile - these sleepers are simply nailed down.

Now the question is: how to flatten down this quickset, quickly, without destroying the OSB?

Edit: we're talking roughly 1100 sq ft if tile, between the kitchen, dining room and bathrooms.

 

[us3rnotfound]

Have you tried an ice scraper? http://www.uniontools.com/products/detail.aspx?ProductId=1847&LineId=416

I was going to say save your energy and pull up the OSB and replace, but, 1100 sqft is a lot. I can imagine the heavy cold chisle gouges too deep into the OSB, chipping wood out. You just want a smoother/quick scraper, obviously, so if you had one of those handy maybe that would suffice?

Maybe too, pouring and screeding a self-leveling compound to bring the floor flush with quickset, then you could perhaps go with smaller wood strips?

 

[herm0016]

Floor sander will do it. Usually can rent from the usual places.

I had about 150 sq feet of similar and used a belt sander. I put nail down wood over it. With the extra layer, I would not bother with self leveling compound.

 

[Greenman]

I would think a floor sander would take a while to chew through the thinset. I'd try a power floor scraper first. Nothing is going to be quick or easy.
I'm assuming the OSB is the actual sub floor and not an underlayment?

Be sure to wear a dust mask, silicosis isn't something you want.