Rust on half render drip bead bleeding through paint

Discussion in 'Painters' Talk' started by CandleSniffer, Apr 13, 2015.

  1. CandleSniffer

    CandleSniffer New Member

    I have a half rendered house which is in dire need of a fresh coat of paint. At the bottom of the render on the drip bead in just a few spots there is rust showing through the paint. I presume it is rust as it is orange, though I guess it could be microbial.

    This is only showing on the corners of the house where we have had problems with the guttering and water has sheeted down the render. I hope that once the roof-line is repaired there will be no further damage to the render or bead.

    How would you proceed regarding the rust?


    Thanks for your time
     
    CandleSniffer, Apr 13, 2015
    #1
  2. DIYDave.

    DIYDave. Screwfix Select

    Hi Sniffer
    Had this problem in a few areas on my house so did the following prep before repainting
    Not saying its the right or best method, but, couple of years later, no signs of rust returning;

    Wire brush rusty areas to remove surface rust and any loose stuff

    Used this product and gave a coat (or 2 ?) over rusty areas, overlapped onto non rusty bits by an inch or so
    http://www.toolstation.com/shop/p43408

    Followed this by 2 coats of exterior white gloss

    Followed by 2 coats of masonry paint (Dulux Weathershield

    A bit of extra prep and time involved but hopefully worth it in the end
     
    DIYDave., Apr 14, 2015
    #2
    Gatt likes this.
  3. CandleSniffer

    CandleSniffer New Member

    Thanks for the advice Dave, sounds good. I don't mind the extra prep, I would prefer to do it right first time.
    Did you find 250ml was enough for you?
    Thanks again
     
    CandleSniffer, Apr 14, 2015
    #3
  4. DIYDave.

    DIYDave. Screwfix Select

    Yep found the 250 size tin was enough for me but obviously, all depends on how many rusty areas you have !
    Your only painting small areas at time with this stuff so surprisingly it goes a fair way

    Whilst your getting the rust stuff, you can pick up the Toupret at the same time :D

    Sorry Screwfix :eek:
     
    DIYDave., Apr 15, 2015
    #4
    KIAB likes this.
  5. CandleSniffer

    CandleSniffer New Member

    Thanks Dave, I picked up a 250ml tin yesterday afternoon. I did not read this soon enough to get the filler while I was there.
     
    CandleSniffer, Apr 17, 2015
    #5
  6. another amateur

    another amateur Member


    This thread covers my query so thank you and candlesniffer.

    Flag recommend using a solvent based primer after the rust convertor so I will probably replace one of the coats of gloss with that.
     
    another amateur, Apr 20, 2015
    #6
  7. another amateur

    another amateur Member

    A further question. Before applying the masonry paint is it necessary to sand the gloss to provide a key?
     
    another amateur, Apr 20, 2015
    #7

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