How Long Does K-rend Render Last?

As an exterior wall coating, K-rend render provides an attractive and protective finish for your home for many years. However, the exact lifespan of K-rend render depends on several factors, including the specific render type, quality, how well it’s applied to your walls, and the environmental conditions it’s exposed to.
With minimal maintenance and protection from damage, high-quality K-rend render applied properly can typically last 20-30 years or more.


Render Type

K-rend produces both cement-based and acrylic renders, which have different durabilities. Acrylic K-rend, like Silicon K and One Coat K, tend to last longer. Since, they’re more flexible and water-resistant, which means they’re less prone to cracking and crumbling from environmental stresses.

However, acrylic renders don’t have the hardness of cement-based renders, so they can be more susceptible to staining, moss, mould, and mildew growth, or other surface damage if not properly sealed and maintained.

Cement-based K-rend render, like Traditional K, may need re-application or patching sooner due to a higher chance of shrinkage cracks forming as it cures. However, cement render is more moisture – and mould-resistant when sealed since its less porous than acrylic.

When choosing between acrylic and cement-based K-rend render, you’ll need to consider the texture, durability, and maintenance needs that are most important for your project. Either type can last a long time when high-quality render is applied and cared for properly.


Application Quality

In addition to the render type, how the K-rend render is applied to your walls will significantly impact its longevity. If the render is applied too thin (fewer coats than recommended), it will wear down and deteriorate faster from environmental exposure. For best results, have K-rend render applied by a professional renderer or follow product instructions closely if applying yourself.

Properly preparing the wall surface, using an adequate number of coats with consistent thickness, and smoothing/texturing the final coat to provide a uniform surface will help K-rend render last longer. It’s also a good idea to touch up any thin spots in the render within a year of application to prevent premature cracking or crumbling.


Environmental Conditions

The environment your home’s exterior is exposed to will also affect how long K-rend render will last. Harsher or more extreme conditions will typically cause K-rend render to deteriorate more quickly.

For example, excessive moisture exposure can lead to mould and mildew growth in K-rend render, especially in warm or tropical climates. Direct sunlight can cause K-rend render to fade, chalk, and crack more quickly due to UV damage. Freezing temperatures can also cause K-rend render to crack.

To maximise the lifespan of your K-rend render in your local climate, take steps to protect it from environmental damage. Apply a protective sealant to help prevent moisture penetration and staining. Limit sun exposure by installing roof overhangs or other shade structures. Improve ventilation behind the render to prevent trapped moisture. Repair any cracks or damage quickly to keep water from getting behind the render.

Overall, the type of K-rend render you choose, how well it’s applied, and the protection you provide from environmental factors will all impact how long it will last. By considering these factors and taking the necessary steps to use high-quality render and safeguard it from damage. Your K-rend render can provide an effective and affordable wall solution for many years to come.

If your exterior K-rend rendered walls shows signs of wear, please don’t hesitate to contact us. We provide free consultation and quotation, so call us today!