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How to fill concrete holes before applying full cover exterior paint

BC2
Just Starting Out

How to fill concrete holes before applying full cover exterior paint

Hi 

 

I am looking to make the concrete surface in the attached picture even so I can apply a full cover exterior paint to achieve a rendered look, please advise which product should i use?

 

Thank youfeb249a4-0a2f-4ebf-8d73-45a88d6d370e.jpg73b36fe9-1c7b-4667-9217-782cb8eb0f2c.jpg

EricL
Bunnings Team Member
Bunnings Team Member

Re: How to fill concrete holes before applying full cover exterior paint

Hello @BC2 

 

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about rendering and painting your masonry wall.

 

Is this a free-standing wall or is it a retaining wall? If it is a retaining wall, unless it has been sealed from the other side anything placed on its surface will eventually peel off due to moisture passing through the wall. But if it is free standing with nothing on the other side, please have a look at my recommendations below. 

 

In regards to rendering, I suggest thoroughly cleaning the wall with a pressure washer and then treating it with 30 Seconds 2L Outdoor Cleaner Concentrate in combination with an Oates Long Handle Grout Brush

 

I recommend roughing up the surface of the unfinished area with a Trojan 5x15 Row Stainless Steel Wire Brush. Please make sure to wash away the concrete dust that will be generated by the steel brush. Once the surface is dry and clean, you can then begin planning on rendering the surface. 

 

Here is a handy step-by-step guide: How to render

 

Depending on the weather, the render must be allowed to totally cure and be absolutely dry before you make any plans on painting it. It could take anywhere from 4 to 6 weeks for the render to be absolutely moisture free. Painting too early will result in the paint peeling off.

 

I propose having a look at Dulux Weathersheild or Taubmans Sunproof external paint for your masonry wall. They are self-priming and can go onto a variety of surfaces.

 

Please make sure to wear personal protection such as gloves, goggles and a mask when working on your project.

 

If you have any other questions we can help with, please let us know.

 

Eric

 

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BC2
Just Starting Out

Re: How to fill concrete holes before applying full cover exterior paint

Hi Eric

 

Thank you so much for the insight unfortunately it is a retaining wall and I doubt it has been sealed from the other side , so I guess rendering is not an option :(.

 

Do you have any other suggestions on what could be done to improve the overall appearance of the wall ? I was thinking maybe cladding it with fibre cement or some other sort of panels , if that s a viable option can you provide some guidance please.

 

There s around 50 sqm of retaining wall with the highest one being 2.2m high30.PNG40.PNG

 

Thank you

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