Correct way to paint smooth cement render? Internal/Extern..

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devs
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Correct way to paint smooth cement render? Internal/Extern..

Post by devs » Sun Nov 25, 2018 4:23 pm

Hi guys, I've recently built a large garage outside that has been finished with smooth cement render both inside and out. I just wanted to know the correct way to paint this after it is finished drying out.

I plan to use sandtex masonry paint for the inside and Dulux Weathershield for the outside.

Any advice would be great.

Thanks ;)
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Ktuludays
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by Ktuludays » Sun Nov 25, 2018 5:58 pm

Wait till spring at the earliest. It needs to be fully dry and a warm day with no chance of rain.

Masonry paint brushes are only a few quid and normally around 4 inches wide.

Brush any loose bits off and paint as normal

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devs
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by devs » Sun Nov 25, 2018 6:12 pm

Thanks for the response pal, I need to paint the inside prior to Christmas if poss. Happy for the outside to wait until the weather improves. Is there not some technique to painting render? Diluted paint, pva etc to soak prior to good coats?
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by OchAye » Sun Nov 25, 2018 7:42 pm

Why do you need two different paints when both are suitable for exterior use? You have not been taken by the marketing of Dulux, the word "Weathershield"?

You can do the inside once it is fully dry and temperatures are give or take >8 degrees or so (the paint will say minimum temperature for application). If you intend making your garage into a workshop or spending time in it, perhaps consider an interior paint for the inside as exterior paints contain things (anti fungal, anti mould and anti whatever things).

For the correct way see the instructions for the paint you decide to use for priming new surfaces. You may have to use a thinner coat of the same paint or a specialist primer by the same company.
Last edited by OchAye on Sun Nov 25, 2018 7:46 pm, edited 1 time in total.
Ktuludays
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by Ktuludays » Sun Nov 25, 2018 7:46 pm

devs wrote:Thanks for the response pal, I need to paint the inside prior to Christmas if poss. Happy for the outside to wait until the weather improves. Is there not some technique to painting render? Diluted paint, pva etc to soak prior to good coats?
No, masonary paint is good to go from the tin.

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Re: Correct way to paint smooth cement render? Internal/Exte

Post by Desmondo15 » Sun Nov 25, 2018 8:16 pm

https://www.duluxtradepaintexpert.co.uk ... ts/418.pdf

1 part water to 5 parts paint for bare surfaces.
devs
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by devs » Mon Nov 26, 2018 1:29 pm

Thanks a lot for all the help and info guys. The Weathershield that ill be using is an off white colour to match the house.

I've bought some cheap tubs of paint that I'll water down prior to using the more expensive paints.

Many thanks, Devs.
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by OchAye » Mon Nov 26, 2018 6:32 pm

Using some cheaper paint before you use your better paint is like buying a brand new car and straight away putting remoulds on it (if you can still get them) to preserve the good tyres. Or to rephrase, you want as much adherence to the surface underneath as possible, why put a layer of cheaper paint in between?
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Re: Correct way to paint smooth cement render? Internal/Exte

Post by Desmondo15 » Mon Nov 26, 2018 7:47 pm

OchAye wrote:Using some cheaper paint before you use your better paint is like buying a brand new car and straight away putting remoulds on it (if you can still get them) to preserve the good tyres. Or to rephrase, you want as much adherence to the surface underneath as possible, why put a layer of cheaper paint in between?
I was waiting for you to say that....
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