Sanding advice

Discussion in 'Wood' started by Jambo, Jun 23, 2014.

  1. Jambo

    Jambo Well-Known Member

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    Not my area of work so a bit of advice please. I fitting out a community centre with a variety of floors but the original hall floor is staying and the building company are sanding it back and refinishing it. The young lad they had on it today was getting no where fast. It looked like a 12" drum sander they were using (120 grit) and it clogged every few minutes and the extraction pipe clogged just a frequently. It looks like the original varnish is clogging the belt too quick. What size and type of machine should they be using to get best results?
     
  2. Simply Sanding

    Simply Sanding Well-Known Member

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    Sounds like they've hired a Bona machine with a 10" drum and the young chap is a bit clueless, but then again sounds like the builder is not much better for letting him loose thinking he can sand it off with a 120. He should finish on that...

    Right machine, wrong grit.... Using a lower grit will help, maybe a 40 grit to start, may even have to go lower down to 24 or 36.
     
  3. Jambo

    Jambo Well-Known Member

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    cheers fella, I'll pass this on tomorrow :thumbs
     
  4. mjfl

    mjfl Well-Known Member

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    Main area 36/50/80/100
    Edges 50/80/100
    Random sander all over 100
    without looking at the job of course
     
  5. Simply Sanding

    Simply Sanding Well-Known Member

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    What timber was it?

    Grit progression as well, if it works on a 40 then go 60/80 or 100 but if they start on a 24 they'll have to 40 grit and then the rest.

    Good luck.

    Or do what he said above.
     
  6. mjfl

    mjfl Well-Known Member

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    I've gotta stop drinking... i'm seeing double..lol
     
  7. Jambo

    Jambo Well-Known Member

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    I arrived today and they had changed over to 40 grit and were having a far better day :) They are planning to refinish it for the clients and also put the badminton lines back on. Is there a varnish/finish that I could pass on to them to use?
     
  8. gazhugs

    gazhugs Well-Known Member

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    Junckers HP Sport is quality gear to use in that type of environment, Junckers Prelak is a good water based primer to use as the primer coat, Junckers Baseprime is a solvent based alternative,[to the w/b primer] i'd do a minimum 3 coat system, a 4 coat is obviously better but it obviously depends on what specification the contractor has quoted the client...just saying :beer
     
  9. mjfl

    mjfl Well-Known Member

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  10. Jambo

    Jambo Well-Known Member

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    Cheers guys, just trying to help these guys out as they're struggling to know themselves.
     
  11. Trimmer

    Trimmer Well-Known Member

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    It's all well and good being a nice guy but they're doing what is a highly skilled job and they haven't got a clue. They should have paid to have it done properly
     
  12. Trimmer

    Trimmer Well-Known Member

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    This could end up in the cfj as a case study (Sid did one very similar a few years ago)
     
  13. gazhugs

    gazhugs Well-Known Member

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    As Trimmer said, if they haven't got a clue wtf are they doing sanding a pretty big floor [probably badly]
     
  14. Jambo

    Jambo Well-Known Member

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    Totally agree with all the above, they have taken on a large renovation project and use their own men for all the stages ....... apart from the flooring ;-) I've been subbed in to do the safety/entrance/stage flooring and now the whiterock for the kitchens. Don't get me wrong, these guys are extremely good builders and whilst that does not qualify them as floor polishers they won't leave the job until its right. Also, and very importantly there is no one in my area for uber miles that I know of that does this work.
     

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