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Cement Render vs Acrylic Render

9/12/2012

7 Comments

 
| Cement Render | Acrylic Render | Texture Coatings | Cracking Render | Cement | Home Substrate | 
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If I had a dollar for every time someone asked me "What is the difference between cement render and acrylic render?", I would have fair dinkum retired by now! A slight exaggeration, but I definitely wouldn't be rendering anymore, that's for sure!

The explanation is quite simple: 'cement render' contains cement, and 'acrylic render' does not.

Cement render comes dry, i.e., requires hydration to activate, acrylic render comes already wet, i.e., in a pale or a bucket.

Cement render dries solid and brittle, and is prone to cracking if ever there is movement in the walls, whereas acrylic render remains flexible and can absorb a small degree of movement, as it is essentially a sheath, or a coating.

Cement render can be applied quite thick, i.e., up to 15mm depending on the substrate, whereas acrylic render is usually used more so as a skimcoat, since it relies on evaporation to set.

The only thing these two products have in common is that they are both applied by trowel and done so by a renderer.

Both systems have their limitations and their own list of pros and cons. For best results, they can be used one after another to achieve the best of both worlds!

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7 Comments
Katrina link
14/8/2013 11:52:31 am

Great Read... We Get asked this question all the time.

Reply
Julie anglesey link
18/8/2014 11:06:42 am

Would love to know a summary of the pros and cons of each. Which would you recommend for rendering over a 20 year old brick house that needs a cosmetic facelift? Or is it just a matter of client preference? Cheers.

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Smarter Rendering link
25/8/2014 07:54:24 pm

At any given time getting cement renderer in Sydney is more cost-effective and inexpensive than buying a new home. So it is ideal that you think wisely and hire a good company for rendering your home.

Reply
Mike
21/9/2014 02:02:35 pm

Hi

My building contract says "acrylic render" and I dont think that is what I got. We had several products delivered to site that included a cement mixer, sand, cement and builders clay which was mixed and applied in one 6mm thick coat. Two years later we have extensive spider/crazy cracking on all walls ...was I conned ?? all my research points towards "acrylic render" being ready mixed and delivered in tubs and generally applied over a base of cement render. It has been suggested we might have a Polymor additive render but to my understanding thats not "acrylic render" or is it ??

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Rebecca Gardner link
14/4/2020 12:13:22 pm

It was interesting when you talked about how cement rendering can be applied in greater thickness than acrylic can. My brother told me he wants to get some kind of rendering for the exterior of the office building near the freeway he just purchased. The info you shared here should help him determine which type of commercial rendering would be the best for his situation!

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Irene
16/10/2020 08:28:05 pm

Hmmm ... now I'm even more confused! I am using Dunlop Acrylic Render (for craft projects like pots and wall plaques) and wanted to know if it would benefit from remaining submerged in water for a month or so to increase its final strength, like I do with my Portland Cement projects.

So here why I'm even more confused now: this blog post says "'cement render' contains cement, and 'acrylic render' does not". HOWEVER, the product sheet for Dunlop Acrylic Render specifies that it contains between 30-60% PORTLAND CEMENT.

???

Reply
Hailey Miller link
27/8/2021 07:40:46 pm

Thanks for pointing out that acrylic render remains flexible and can absorb a small degree of movement. This is really helpful because my husband and I want to enhance our property before our parents come to visit next month. With this, we are hoping to find experts on Monday who can provide a pleasant-looking finish to all major damages around our property within two weeks.

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    Allen Cetinic is the Director of Render My Home. He currently holds a Diploma & Certificate IV in Building and Construction (Building) and a Bachelor of Applied Science.



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