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Repainting over lime wash

Dear forum
I hope this is a straightforward one .. I have a lime washed paint ( about 10 years old ) over my internal lime plastered walls all in Good condition
I just want to repaint with Earthborn paint for a different look . Do I need to wet the walls first or do a mist coat or can I just apply two coats of Earthborn clay paint on top of the lime wash?
All the advice I find online relates to newly plastered walls.
Thanks
Kate

7 thoughts on “Repainting over lime wash”

  • Adam Brown

    Hi Kate

    As long as the lime wash is clean, dry and stable it should be fine to paint directly over the top. However, for the best results i would personally look to try and remove the existing lime wash and go back to the lime plaster. As the paint is only as good as the surface it goes onto you are relying on the lime wash to hold, although if the lime wash appears sound it would be ok to paint over.

    I would apply the first coat thinned with some water as to the manufacturers instructions, to help deal with the possible high suction and then a further coat applied neat. This should be sufficient, but if the background is overly porous you may need a third coat over this.

    Kind Regards

    Adam

    Reply
  • Alison Mckenzie
    Alison Mckenzie November 7, 2018 at 7:43 pm

    I have moved to a 1760 house, the internal walls have been painted by the previous owners and mould spores are appearing, should we remove the paint off the walls before repainting, if so how would you remove it?

    Many thanks
    Alison Mckenzie

    Reply
    • Adam Brown

      Hi Alison

      The first thing I would look at is to why and how the mould is transferring through the walls. There is a chance that the paint used is possible restricting moisture movement and this could also be the case for the plaster behind the paint. Do you know if a modern paint has been used? Redecorating may not solve the issue.

      If you would like to discuss this in more detail please contact us, also if you are able to send us any photos of the affected areas we can take a closer look and advise on the best solution.

      Kind Regards

      Adam

      Reply
  • FRANCHESKA CASTRO
    FRANCHESKA CASTRO February 7, 2019 at 1:43 am

    HI, I HAVE PAINTED MY BRICK HOME WITH LIMEWASH ABOUT 3 MONTHS NOW. I FEEL LIKE WILL LOOK BETTER WITH SOME SOLID COLOR . CAN I PAINT OVER IT? OR I NEED TO PRESSURE WASH AND TRY TO REMOVE THAT LIMEWASH BEFORE I PAINT? HOPE YOU CAN ANSWER MY QUESTION.

    Reply
    • Adam Brown

      Good Morning

      Limewash can be over painted, but there are some factors which need to be considered -

      What are you planning to over paint with? For example a modern masonry type paint would not be suitable as this is designed to be waterproof and will prevent moisture movement, working the opposite way of a lime wash. Moisture will then become trapped behind this coating, which can increase hydraulic pressure and eventually force the masonry paint from the surface (flaking, bubbling, peeling). One of our Beeck Mineral Paints would be better suited as this will not restrict moisture movement, whilst offering a water repellent surface.

      The number of layers and condition of the limewash - if the limewash is loose or dusty it would be best to try and remove it, as any paint is only as good as the surface it is appplied too. Also the number of layers will determine how well a new paint coating can work, if there is minimal limewash remaining on the surface it likely wont cause an issue, but if there are extensive coats it may be harder to paint. For example a mineral paint will look to soak into the substrate and form a chemical bond, this ensures high vapour permeability and longevity, if there are numerous layers of limewash the paint will bind with the limewash rather than the underlying building fabric. As limewash is a relatively weak coat it can break down over time and this could cause the new paint to also come loose as it will only be bound to the limewash.

      Our general advice would be to try and remove anything which may be weak or dusty to begin with and then you will have to determine the suitability and durability of any remaining limewash.

      If you have any questions please contact us.

      Kind Regards

      Adam

      Reply
  • Michael Pledger
    Michael Pledger March 5, 2019 at 3:07 pm

    I have a light overspray of limewash on my exterior trim that I need to paint. It's not heavy by any means and I was wondering if it would be ok to spray over it when I paint my trim. I will be using super paint from sherwin Williams. Any feedback will be great. Thanks in advance

    Reply
    • Adam Brown

      Hi Michael

      To be honest I am not sure as I have no knowledge of the paint you will be using over the top or the trim type, type of limewash used etc.

      I would recommend removing the limewash to be safe, as limewash can breakdown/become loose if not applied to the correct background.

      Kind Regards

      Adam

      Reply

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