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What's the best way to patch this rendering on my house?

Discussion in 'Plastering and Rendering' started by uptown47, 23 Aug 2017.

  1. uptown47

    uptown47

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    Hi there,

    I've noticed some of the rendering missing from next to an upstairs window. I've not noticed it before but would like to repair it.

    I was (mistakenly) under the impression I could just go to B&Q or screwfix etc and buy a tube of "render" and then apply it (like polyfilla) but it seems there's a lot more to it than that. I have found some 'ready' mixed render but it's from B&Q so not sure if it would be any good.

    So I thought I would ask the professionals for advice.

    It's such a small area and easily accessible from the window so I'd rather do this myself than get a professional in.

    Here are some pictures of the work that needs doing...

    image3.jpg

    image4.jpg

    image1.jpg

    image2.jpg


    Could someone advise me how I go about repairing this please?

    A big thank you for any help you can give me.

    Cheers

    John :)
     
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  3. vinn

    vinn

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    The frame itself is pretty sheltered and its well recessed.
    Whats the white stuff, is it foam?
    I cant see if you have an angle bead on the outside corner? You should have.

    Perhaps just get a small bag of sand & cement from a plumbers supplies and after gluing up the patch (Pva or SBR etc) then fill and level off with the mortar.
    As it dries then rough up the surface to match the surrounding render.
    When dry paint to match.
     
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  4. uptown47

    uptown47

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    Hi Vinn

    Thanks for getting back to me. I'm not sure what the white stuff is? Just painted render I think?

    I had a look late last night and I couldn't see an angle bead on the outside corner but I can probably shape it round (even if I do one side, let it dry and then do the other side?).

    Please excuse my ignorance with the following questions but... is it any particular type of sand / cement?
    What about this stuff... http://www.screwfix.com/p/cementone-waterproof-cement-grey-10kg/58196

    Could I just use that, it seems like it's 'ready to use' ?

    Thanks :)
     
  5. Alastairreid

    Alastairreid

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    google monocouche render.
     
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  6. vinn

    vinn

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    OP,
    Yes, that will work - its more or less the same as the S&C repair bags from a plumbing supplies.
    No matter what you apply its a sheltered location, and in time the finish will weather in to match the surrounding render.

    Keep it simple - stay away from Mfr's advice, they will require you to have an expensive and perhaps for, a DIY'er, a complicated kit.
    Just patch it with S&C, and forget about it.
     
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  7. Alastairreid

    Alastairreid

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  8. uptown47

    uptown47

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    Thanks for the advice Vinn. Much appreciated mate.

    Thanks for the help Alastair. It looks like I'd need 3 different types to do the job properly with that stuff but it looks like good stuff. Considering the size of the job I'll just use the stuff from screwfix for this.

    ** Edit ** just ordered the screwfix stuff as the reviews looked really good and now I've got the say-so from Vinn that it'll work then that'll do for me! I've ordered a couple of trowels too. There's a few other bits of pointing that I'll do whilst I'm at it so it should be a good investment.

    Thanks all :)


    Cheers :)
     
    Last edited: 24 Aug 2017
  9. Alastairreid

    Alastairreid

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    Youre taking the advice from a character who advises patching monocouche with s+c
    Doesnt know what silicone sealant is and advises using pva as an exterior adhesive.
    btw it will stick out like a sore thumb! regardless where it is.
     
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  11. uptown47

    uptown47

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    It was just that, after reading your link, it looked like I would need three different types of k-rend?

    Is this not the case?

    Thanks Alastair.
     
  12. Alastairreid

    Alastairreid

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    No..You just need a bag of one coat! damp the area down, mix the powder up with some water in a bucket, apply with a small guaging trowel, leave for an hour or two..rub over with a sponge to give the textured look you have already...job done.
    I cant tell from the pic if its white or cream..get the proper colour, you wont need to paint it. K rend have a plant in coatbridge they would give you a small bag for nothing as a tester...if youre anywhere near it.

    Normal pva glue should not be used externally as it is water soluble.
    the white stuff round your window is silicone sealant.
    Dont go near your render with portland cement even if it is a small patch..the portland cement will leech into the monocouche and leave a tidemark much larger than the patch.
    Corner beads are not always used...an arris can be formed with straight edges
    .https://www.diynot.com/diy/threads/creating-external-corners-in-render-the-traditional-way.400573/


    Ive been using this stuff for yrs...Vincent doesnt even know what it is.
     
    Last edited: 24 Aug 2017
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  13. uptown47

    uptown47

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    Thanks Alastair. I would prefer not to paint it and, as long as it's ok to just use the one coat, I'll go with K-rend. I just thought buying three bags of something was overkill for the amount I needed.

    I'm not far from Coatbridge (I'm in Fife) but it would cost me more in fuel to go there than to order it but thanks for letting me know as it's handy to know if I'm passing anytime.

    Thanks again mate :)
     
  14. chappers

    chappers

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    colour matching exactly is going to be quite hard especially on something that has been up for a while, there are a fair few to choose from in the whit/cream/stone range.
     
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  15. uptown47

    uptown47

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    Yep, I thought that. To be honest, I'm not too bothered about the aesthetics (although obviously the nearer the match the better), it's more to do with getting it sealed before winter sets in.

    I'm planning on getting someone in to paint the eaves and the masonry next year anyway when funds allow so it'll get sorted colour-wise then hopefully.

    Cheers :)
     
  16. Nige F

    Nige F

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    Last edited: 19 Sep 2017
  17. Alastairreid

    Alastairreid

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    £11 vinn, vincent, vinny...who cares! Still crap advice.
     
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