Frequently Asked Questions

Please browse our FAQ for some answers to many common questions and issues.

Please call our head office on 1300 889 225 for any further queries.

How do I know which render to use on my job?

It is extremely important that you use the correct rendering product for your specific project.  To point you in the right direction, please navigate to our render selector.  If you are still unsure, contact one of our technical staff on 1300 889 225

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Are all renders suitable for all applications?

Absolutely not. Renders contain different levels of polymer and are not suitable for all applications. For application to porous surfaces (such as concrete bricks), a low level of polymer will generally be sufficient whereas non-porous surfaces (such as painted render or expanded polystyrene) will require significantly higher doseages.

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Is the render I just applied meant to be harder?

Cement based renders need time and moisture to fully cure. Render applied in hot, dry and windy conditions will almost certainly dry prematurely. If this happens, optimum hydration will not occur and the render may seem a little soft or chalky. Our recommendations is to simply hose the render down to promote hydration. You'll notice a significant difference even on the following day. If this watering down is continued over a number of days, your rendered finish will gain maximum strength and durability.

Remember, all cement-based renders in the MAC range have been formulated specifically for the job at hand...we guarantee it!

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Can coloured oxides be added to MAC pre-packaged renders?

The MAC range of pre-packaged renders are not intended for use a top coat. Coloured oxides can however be added during on-site preparation, to produce a coloured render finish. There are however a few points to note when adding oxides on-site.

  • MAC cannot guarantee colour accuracy and consistency across the entire project.
  • Pre-packaged renders are formulated for use as a base coat and as such their suitability as a finish coat (in terms of colour) can not be guaranteed.
  • Oxide addition rate should not exceed 2% of the total weight of dry render powder.
  • Oxides should not be added to specialised products such as Macrender HBS, Dri-Patch, Hi-Build or any product formulated for high performance. Limit oxide addition to Macrender and Supaskim only.

For further information, contact MAC Head Office on 1300 889 225

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Which colours are Mactexture architectural finishes available in?

With our range of acrylic finishes, pretty much any colour you like.  Just let us know the name of the colour you like, and we will provide a computer matched equivalent.  If you require a sample prior to the project starting, you can order a sample here.

With Portofino cement-based finishes, colours are generally limited to our standard range of 20 earthy tones.  Colour matching is available but will incur extra charges.

Suede FC finishes are only available in "Natural Grey" and "Natural White".

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How will weather conditions effect the application of my Mactexture acrylic finishes?

Weather conditions will have a significant effect on acrylic based finishes during application. In warm and windy conditions, textured coatings will dry significantly faster due to accelerated evaporation of water from the coating. Avoid application in hot, windy conditions or carry out application early in the morning, preferably out of wind and direct sunlight. In extremely cold and damp conditions, textured finishes will dry much slower than normal due to slower evaporation from the coating system. Coatings may be wet for hours after application and in extreme cases may even remain wet overnight. To avoid problems with application in cold weather, avoid applying textured finishes late in the evening or in damp areas with minimal ventilation.

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Can I apply Mactexture finishes myself or do I need to employ a professional?

In small DIY situations, Mactexture finishes can be applied by a home handyman. This may not be the case on larger projects. Large projects often require significant labour and equipment to achieve a successful result. No matter what size the project is, there is no doubt a professional will produce a better looking finish. Call our head office or your local reseller for contact details of experienced applicators.

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White streaks and patches on my SUEDE?

After Suede is applied, we recommend that it is cured by evenly misting the surface with water to promote curing of the coating. This should be done for a number of days to ensure full hydration of the coating has occurred. A well hydrated cement based coating such as Suede is far less likely to develop such marks in the future.

At a minimum, Suede should be protected from heavy rain and running water for a minimum of 4 days from time of application.

Please ensure that all flashings on parapet walls have been installed correctly so that rain water will fall away from the face of the wall and into the box guttering.

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After it rains, for a while I can see the marks where my lightweight cladding system was attached to the frame.  What causes this?

Cement based renders and coatings will develop different levels of moisture resistance as they cure at different rates after application. Therefore some areas will hold moisture longer than others - as is sometimes seen over EPS washers locations.  MAC recommends that rendered walls are primed with Macprime and allowed to thoroughly dry (a minimum 24 hours) prior to the application of Portofino.  This will even the surface and allow the Portofino to dry at a more controlled rate.

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How is Suede different from Portofino?

Whilst both products are cement-based finishes, Suede and Portofino are very different in their application, finishing and final appearance.

Whilst Portofino is available in a number of colours, Suede is currently available in natural grey and natural white. In terms of surface finish, Portofino has a sandy, grainy type finish whilst Suede is completely smooth like hardset plaster.

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Can Suede FC be coloured with powdered oxides?

Suede is only available from MAC in "Natural Grey" and "Natural White".  Coloured oxides can however be added during on-site preparation, to produce a coloured finish. There are however a few points to note when adding oxides on-site.

  • MAC cannot guarantee colour accuracy and consistency and longevity across the entire project.
  • Oxide addition rate should not exceed 4% of the total weight of dry powder.
  • Depending on oxide type and addition rate, there may be some impact on workability of the product during application and finishing.

For further information, contact MAC Head Office on 1300 889 225

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Glancing light.  What is it?

Glancing light is a phenomenon seen on rendered surfaces, which becomes evident as the sun comes into perfect alignment with the wall face. The shadows cast over the surface appear elongated and as such may greatly exagerate the undulations in the surface causing it to appear wavy. The effect of glancing light is usually fleeting depending on the time of year and the orientation of the wall. The effects can last longer in the summer months as the sun takes a higher arc.

Points to note:

  • Glancing light is often more noticable on fibre-cement sheet constructions due to the presence of taped joints at sheet junctures. This type of surface requires a flexible base coat which can often only be applied in a thinner section. This means that it is quite difficult to create a completely true surface. The rendered finish will tend to follow the undulations of the frame and sheeting. For this reason, the use of fibre cement sheet is generally limited to low cost projects and the results will more often than not mirror this.
  • On masonry surfaces such as brick and blockwork, the extent of glancing light is directly proportional to the skill of the applicator. A skilled applicator may produce work with virtually no glancing light whilst for an inexperienced applicator the opposite may be be true. Always check the workmanship of your chosen applicator by viewing at least one of their recently completed projects. Rendering can be a significant investment so an hour of so to inspect your applicators previous work is a good idea.

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