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Old 01-20-2013, 03:57 PM   #16
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Suitable to polyurethane over scratched floors?


The floor clearly need to be refinished. Buffing and recoating them would probably make all of the discoloration and scratches stick out worse. If you just refinish them and use a tough finish they will probably hold up well to renters. Then as long as you buff and recoat the floors between each tenant you can probably avoid the need to sand them again. A good finish is about $120 per gallon, so the finish alone will cost at least $300, then once you factor in the rental of a drum sander, a buffer, an edge sander, sand paper for each machine, applicators, brushes, sealer, mineral spirits, buffer pads, carbide scraper, sanding screens, marroon pads for buffing between coats etc, you can probably just hire someone that owns this stuff for not a whole lot more. You really can't save a whole lot on doing your floors yourself, until you have about 1,000 square feet and thats if you can get the sanding done in a couple of days, because much longer with rental on 3 machines will probably come close to costing about the same amount. The good news is; once you get these floors looking really good you might be able to squeeze out a little more in monthly rent.

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Old 01-20-2013, 08:29 PM   #17
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Suitable to polyurethane over scratched floors?


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Originally Posted by Awoodfloorguy View Post
A good finish is about $120 per gallon, so the finish alone will cost at least $300,

What do you consider a good finish? I guess I thought the $30 gal polyurethane was about as good as it gets?
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Old 01-20-2013, 08:36 PM   #18
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Suitable to polyurethane over scratched floors?


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What do you consider a good finish? I guess I thought the $30 gal polyurethane was about as good as it gets?
I was referring to Bona Traffic HD. I guess I should not have said a good finish is this much. Their are finishes that can be purchased for quite a bit less that are pretty good. This is just the best. If you don't wanna spend that much maybe consider Bona Woodline (approx $40 per gal) if interested in an oil polyurethane, or for waterbased finish Bona Mega (approx $60 per gallon), Basic Coatings Street Shoe (About $90 per gal), or Bona Traffic (About $100). These are all pretty good and the price of each of these reflects the quality. 2 component water finishes are the hardest; traffic, traffic hd, and street shoe.

Many times we will use an oil poly base coat with water finish coats. This gets a nice thick build on the floor to then allow the super hard finish to sit on top and protect the floor. Plus this makes the expensive stuff go a lot further. Hope this helps.
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Old 01-20-2013, 09:09 PM   #19
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Suitable to polyurethane over scratched floors?


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Originally Posted by Awoodfloorguy View Post
I was referring to Bona Traffic HD. I guess I should not have said a good finish is this much. Their are finishes that can be purchased for quite a bit less that are pretty good. This is just the best. If you don't wanna spend that much maybe consider Bona Woodline (approx $40 per gal) if interested in an oil polyurethane, or for waterbased finish Bona Mega (approx $60 per gallon), Basic Coatings Street Shoe (About $90 per gal), or Bona Traffic (About $100). These are all pretty good and the price of each of these reflects the quality. 2 component water finishes are the hardest; traffic, traffic hd, and street shoe.

Many times we will use an oil poly base coat with water finish coats. This gets a nice thick build on the floor to then allow the super hard finish to sit on top and protect the floor. Plus this makes the expensive stuff go a lot further. Hope this helps.

Thanks a bunch for your expertise!

I don't mind paying for the premium finishes if they are indeed better. I'm looking for the most durable finish possible. Just assumed a generic brand of poly would be just as good if it has the same exact ingredients...apparently this assumption does not hold true for polyurethanes?

Didn't realize you can put a water base poly over an oil base. So I can use a cheap oil poly base coat and then finish with 2 coats of premium water finishes...or should I use a premium oil base as well?

How long should I allow the oil poly base to dry? One or two days or a whole week?

Also will all of these coatings slightly yellow the floor and possibly eliminate the need for staining?
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Old 01-20-2013, 09:51 PM   #20
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Suitable to polyurethane over scratched floors?


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Thanks a bunch for your expertise!

I don't mind paying for the premium finishes if they are indeed better. I'm looking for the most durable finish possible. Just assumed a generic brand of poly would be just as good if it has the same exact ingredients...apparently this assumption does not hold true for polyurethanes?

Didn't realize you can put a water base poly over an oil base. So I can use a cheap oil poly base coat and then finish with 2 coats of premium water finishes...or should I use a premium oil base as well?

How long should I allow the oil poly base to dry? One or two days or a whole week?

Also will all of these coatings slightly yellow the floor and possibly eliminate the need for staining?
No problem. Glad to help. I would use the Bona woodline as a base coat and then then 2-3 coats of the traffic. Once the oil gets on there the water finish spreads really far. 1 gallon will do typically do 2 more coatings on at least a 350 sq ft job. Or you can even do 2 coats of the oil poly and 2 of the water. I would wait at least 12 hours for the oil poly to dry, then buff it with a 220 screen. To buff between water coats I would use a maroon pad or a Norton Sand Dollar, as the mesh screens (even 220 grit) leave swirls in the finish). If you use this oil/water combo method, the oil finish does give the floor a slight ambered look. Stain is not completely necessary, unless you want to change the color of the floor or if you have some stains that won't sand out, that you want to try to hide. Most stains will usually sand out, with the exception of pet stains.

I believe Chicago Hardwood Flooring will ship these finishes to you, if you don't have access to them. They will also have t-bars and applicators if needed. Let me know if I can help with anything else.
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Old 01-20-2013, 10:16 PM   #21
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Suitable to polyurethane over scratched floors?


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No problem. Glad to help. I would use the Bona woodline as a base coat and then then 2-3 coats of the traffic. Once the oil gets on there the water finish spreads really far. 1 gallon will do typically do 2 more coatings on at least a 350 sq ft job.

I've got about 700 sq feet. So if I do 2 coats of Woodline and 2 coats of Traffic I could probably do the job with 4 gals of Woodline and 2 gals of Traffic?
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Old 01-20-2013, 11:48 PM   #22
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Suitable to polyurethane over scratched floors?


4 gallons might be cutting it close for 2 coats of the oil. It does not spread nearly as far. But 5 gallons should get it done. It comes in 5 gal buckets, so maybe just pick up one of those.
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Old 01-21-2013, 09:01 AM   #23
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Suitable to polyurethane over scratched floors?


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4 gallons might be cutting it close for 2 coats of the oil. It does not spread nearly as far. But 5 gallons should get it done. It comes in 5 gal buckets, so maybe just pick up one of those.

Thansk again. You've convinced me to go this route. It should help me get a better renter perhaps and maybe I can just lightly sand and recoat when I do decide to sell it.

While I'm on the subject of flooring:

I'm also ripping up old carpet that was glued over cement in 3 rooms. My plan was to rent a concrete grinder to get up all the glue I can't scrape off. Then acid etch the floors and put a concrete stain on them. Would it be good to put the same coating system you suggested above over the concrete stain.... or any better suggestions for these floors? I was thinking stained concrete would be more durable to renters than recarpeting.
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Old 01-21-2013, 09:41 AM   #24
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Suitable to polyurethane over scratched floors?


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Thansk again. You've convinced me to go this route. It should help me get a better renter perhaps and maybe I can just lightly sand and recoat when I do decide to sell it.

While I'm on the subject of flooring:

I'm also ripping up old carpet that was glued over cement in 3 rooms. My plan was to rent a concrete grinder to get up all the glue I can't scrape off. Then acid etch the floors and put a concrete stain on them. Would it be good to put the same coating system you suggested above over the concrete stain.... or any better suggestions for these floors? I was thinking stained concrete would be more durable to renters than recarpeting.
Stained concrete floors are very cool and would be a great option. These finishes are strictly for wood floors. You will want to use concrete sealers for this. I am not all that familiar with this but I know you can find a lot of helpful info about this on the concrete networks website as I have considered going to their classes to learn how to do this. Hope this helps.

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