A Step-by-Step Guide to Applying JUB Silicone Renders

Jub Systems • October 11, 2023

When considering the protection and visual enhancement of your building's exterior, look no further than our range of JUB silicone renders. These thin-coat render finishes, developed from a combination of silicone and other polymeric binders, bring more than just a textured or smooth appearance to your façade; they come with a host of advantages. To ensure a successful application of our JUB silicone renders, follow this comprehensive step-by-step guide.


Step 1: Surface Preparation


Before diving into the application process, it's important to prepare the surface thoroughly. 


Here's what you need to do:


  • Surface Roughness: Ensure the surface is slightly rough but not excessively so. Ideally, it should have the roughness of a conventionally smoothed fine render with a 1.0 mm granulation.
  • Surface Solidity: Check the surface's solidity. It should have a compressive strength of at least 1.5 MPa (classified as CS II).
  • Clean and Dry: The surface should be clean, dry and free from weakly bound particles, dust, easy water-soluble salts, oil stains and other contaminants.


Proper surface preparation is vital for achieving an even and long-lasting finish.


Step 2: Primer Selection


Select an appropriate primer based on the type of surface you're working with:


  • For fine lime-cement plasters and ETIC system basecoats: Unigrund is recommended.
  • For smooth, low-absorbing surfaces (e.g., concrete, fibre-cement boards): Opt for Akrinol SuperGrip.

Step 3: Application of Primer


Apply the chosen primer evenly to the surface using a paintbrush, masonry brush or a long-fibre fur or textile paint roller. Allow the primer to dry thoroughly before moving on to the next step. The drying time for Unigrund and Akrinol SuperGrip is on average 12 hours. Depending on weather conditions drying time can vary.


Detached House with Silicone External Render

Step 4: Render Finish Application


Now, it's time to apply the JUB silicone render finish, a critical step that requires attention to detail and precision. Here's detailed instructions on how to execute this stage effectively:


Mix Thoroughly: Before application, thoroughly mix the render finish with an electric mixer. Ensure that the mixture has a uniform consistency. If necessary, you can dilute it slightly with water, but be cautious not to overdo it. Generally, a maximum of 100 ml of water per container is recommended for dilution. Proper mixing is crucial to achieve a smooth and consistent application.


Colour Shade Check: It's essential to verify that the render finish's colour shade matches your requirements. Additionally, it's a good practice to equalise the render finish. This means eliminating any slight differences in colour shade between individual buckets. To do this, stir the contents of four buckets together in a larger container of suitable size. By maintaining uniformity in colour, you'll ensure a seamless finish.


Application Method: The JUB silicone render finish can be applied using two primary methods - manual application with a stainless steel smoothing trowel or application by spraying. Both methods have their advantages, and the choice depends on your preferences and project requirements.


  • Manual Application: When applying the render finish manually, use a stainless steel smoothing trowel. Start by applying the render finish evenly to the wall surface. Ensure that the thickness of the application is slightly above the diameter of the thickest grain in the mixture.
  • Spraying Application: If you opt for spraying, follow the instructions provided by the manufacturer of the spraying equipment. This method can be highly efficient for covering larger areas quickly. Be sure to adjust the spraying equipment for the desired thickness and consistency of the application.


Smoothing: After applying the render finish, it's essential to smooth the surface promptly. This step is crucial for achieving an even and visually appealing finish. Here's how to do it:


  • Immediately after application, use a solid plastic finishing trowel to smooth the surface.
  • Employ circular strokes to work the render finish and create an evenly-grained structure. The goal is to achieve a uniform and aesthetically pleasing texture.
  • Be careful not to move the grains excessively during smoothing to prevent material bulges in front of the trowel. Material bulges can result from either applying the render layer too thickly or working on an uneven or poorly prepared substrate.
  • A few minutes after smoothing, lightly press any protruding lumps into the surface by gently using a clean stainless steel smoothing trowel. This final step ensures a flawless finish.


Efficient Working: During the application process, it's essential to work as swiftly as possible without interruptions. Begin at one corner of the wall and progress steadily toward the opposite corner. This approach ensures a continuous and consistent application.


Houses with silicone render

Step 5: Weather Considerations


Choose suitable weather conditions for application. Ensure that both the air and wall surface temperatures are between +5 ºC and +35 ºC, with relative air humidity below 80%. While protecting the façade from sun, wind and rain with scaffold netting, refrain from working in the cases of heavy rain, fog or wind conditions (wind speeds of ≥30 km/h) despite protective measures.


Step 6: Clean-up and Safety


Clean your tools with water immediately after use. Dried stains cannot be removed. Dispose of waste materials responsibly, following local regulations. Safety precautions include wearing protective glasses or a mask when spraying the render finish.


By adhering to these comprehensive steps, you can achieve a successful application of our JUB silicone renders. For more detailed information on our silicone renders, feel free to explore our website or get in touch with us. We're here to assist you in achieving the best results for your façade projects.

Modern detached house in the UK with JUB EWI and external render installed.

Transforming Your Home Exterior: Benefits of External Wall Insulation

By Jub Systems • July 1, 2024
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JUB Colour Chart: A Deep Dive into Exterior House Render Colours

By Jub Systems • January 17, 2024
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North Leamington School JUB External Render

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By Jub Systems • August 30, 2023
From enhancing aesthetics to boosting durability, discover how the right choice of external render can elevate the visual appeal and performance of commercial properties.

The Ultimate Guide to the Great British Insulation Scheme: Measures, Eligibility and How to Apply

By Jub Systems • July 19, 2023
Introducing the Great British Insulation Scheme, previously known as ECO+, a government initiative aimed at helping households insulate their homes, improve energy efficiency and reduce energy bills. With the scheme already launched and set to run until March 2026, it's time to discover how this £1 billion programme can benefit households across the UK. In this blog post, we'll delve into the details of the scheme, its eligibility criteria and the range of energy-saving measures available. Benefits of the Great British Insulation Scheme The Great British Insulation Scheme aims to support approximately 300,000 households by providing financial assistance for home insulation. By participating in the scheme, households can save an estimated £300 to £400 per year on their energy bills. The focus is on helping those with the lowest incomes, while also extending support to households living in energy-inefficient homes with Energy Performance Certificate (EPC) ratings of D or below, as well as those in lower Council Tax bands (A-D in England, A-E in Scotland and Wales). This inclusive approach ensures that more people, especially those struggling with high energy costs, can benefit from making their homes more energy efficient. The Aim of the Great British Insulation Scheme  The Great British Insulation Scheme has a clear goal: to deliver single insulation measures to two main groups of customers. The first group consists of low-income individuals who do not meet the minimum requirements for ECO4 assistance. The scheme aims to provide them with valuable insulation measures to improve their living conditions. The second group includes households based on council tax band and Energy Performance Certificate (EPC) rating, targeting a wider range of individuals who can benefit from energy-saving upgrades.

External Render Repair and Maintenance: Preserving Your JUB Render

By Jub Systems • July 12, 2023
Welcome to our guide on external render repair and maintenance. Whether you have a JUB render and/or an external wall insulation system, proper maintenance is essential to ensure longevity and visual appeal. By following our step-by-step instructions, you can reduce the need for extensive render repairs in the future, saving you both time and money. Let's dive into the key steps for effective render repair and maintenance. Step 1: Thorough Cleaning and Primer Application Before starting any redecoration work, it's crucial to clean the external render thoroughly. Remove any visible dirt or dust from the surface, ensuring a clean and smooth base for the upcoming paint application. If necessary, treat the facade with JUB Fungi Wash to eliminate any fungal growth or contaminants. However, avoid using acid-based cleaners or solvents, as they can damage the external wall insulation system. To enhance the adhesion and durability of the new paint, we highly recommend applying an appropriate paint primer to the cleaned render. Step 2: Choosing the Correct Paint Choosing the correct paint is crucial for achieving a long-lasting and visually pleasing exterior finish. Take into account the type of render you have and consult our technical department at technical@jub.org.uk for guidance on the suitable paint product. Avoid using masonry paint that JUB Systems UK Limited hasn't advised to maintain warranties and prevent short-term maintenance cycles. Keep the original render's colour code on file for future reference to ensure accurate colour matching.

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By Jub Systems • May 24, 2023
When it comes to a property's exterior, making a lasting impression with a beautiful and durable finish is key. That's where silicone render comes in. As a high-performance external render, it offers a multitude of benefits that make it the best choice for homeowners and renderers seeking long-lasting and visually appealing results. Benefits of Silicone Render: Why Choose It?  Silicone render stands out for its numerous advantages. Firstly, it provides exceptional weather resistance, making it perfect for even the harshest climates. It can endure heavy rain, extreme temperatures and strong winds without cracking or fading. This ensures that a property maintains its stunning appearance for years to come. Another significant benefit is its breathability. By allowing moisture to escape through the walls of a property, it prevents the build-up of dampness and condensation. This is especially crucial for older houses and buildings with potentially inadequate insulation. By opting for silicone render, you can improve a property's energy efficiency and reduce the risk of dampness and mould. Flexibility is also a key feature of silicone render, setting it apart from traditional render systems. While other renders can be brittle and prone to cracking, silicone render is designed to move naturally with the property's walls, minimising the likelihood of unsightly fissures over time.

ECO Flex: Providing Energy-Efficient Home Upgrades for Non-Benefit Eligible Households in the UK

By Jub Systems • May 17, 2023
The ECO4 scheme has been helping eligible households in the UK to access free insulation and energy efficiency upgrades to reduce energy costs and support sustainable living. However, not all households that need support with improving their homes are receiving income-related benefits. That's why the UK government introduced the ECO Flex scheme. Under ECO Flex, local authorities are provided with more funding to identify residents who would benefit from home upgrades, even if they don't meet the standard eligibility criteria for ECO4. With ECO Flex, households don't have to be on benefits to qualify for funding. ECO Flex Eligibility The eligibility criteria for ECO Flex is quite comprehensive. To qualify, your Energy Performance Certificate (EPC) rating must be between E-G if you rent or D-G if you own your home. If your property is not currently on the EPC register, we can help assess it for you. You must also have a combined household income of less than £31,000. Alternatively, if you meet the EPC criteria, you can qualify for ECO Flex if you meet the following: Your home is within a specific postcode identified by your local council. You receive a council tax rebate (single-person occupancy excluded). You are identified as vulnerable to living in a cold home: someone in the home is pregnant, disabled or elderly, you have children under 5, or someone in the home has a medical condition. Your child receives free school meals. Your home is identified as being in debt to your energy provider. Another way to qualify is if you are identified by your GP as vulnerable to the cold and on a low income.

ECO4 Government Scheme: Free Insulation and Energy Efficiency Upgrades for Eligible UK Households

By Jub Systems • April 12, 2023
In an effort to reduce carbon emissions and increase properties’ EPC rating, the UK government has launched the ECO4 scheme, which aims to provide eligible households with free insulation and energy efficiency upgrades. Benefits of ECO4 The scheme is targeted at low-income households and those living in fuel poverty and is designed to help: Reduce Energy Bills: By providing eligible households with free insulation and energy efficiency upgrades, the scheme helps to reduce energy bills, making it easier for households to stay warm during the winter months. Improve Living Conditions: By installing insulation and energy efficiency measures, the scheme helps to make homes more comfortable, reduce noise levels and improve indoor air quality. Reduce Carbon Emissions: The scheme helps to reduce carbon emissions by promoting sustainable living and reducing energy consumption. This is an important step in creating a more sustainable future. Support Low-Income Households: The ECO4 scheme is designed to reduce the financial burden of heating and cooling a home and can improve the quality of life for those living in fuel poverty. 

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By Jub Systems • February 8, 2023
The Energy Company Obligation (ECO) is a government scheme that offers grant funding to support energy-inefficient homes, which in turn aims to reduce fuel poverty and carbon emissions. In this blog article, we’ll take you through all the details you need to know about the ECO funding scheme, what are the differences between ECO4, ECO+ and ECO4 Flex and do you qualify for free insulation grants. ECO: A Brief Overview ECO was developed for energy suppliers to financially support households across the UK with the aim of boosting the property’s energy efficiency and EPC rating. There are three sets of insulation grants available under the Energy Company Obligation: ECO4, ECO+ and ECO4 Flex. Each grant has its specific eligibility criteria but all of them offer the main types of energy-efficiency measures. These include loft insulation, cavity wall insulation, solid wall insulation and boiler replacement or repair. Can I Get Free Insulation? To qualify for the ECO insulation grants, you need to be the homeowner or have a signed document from your landlord granting you permission to apply. Eligibility criteria for each of the three grants vary and will depend on several factors. Here are some of the factors that if you meet, you will most likely be eligible for the grant to insulate your home:  If you receive the Warm Home Discount in the 'core' group, get eligible benefits and fit the income requirements Live in social housing that has an EPC rating of E or lower (check your energy performance certificate, ask your landlord or social housing association or get in touch with an approved installer to find out ) You meet the criteria set by your Local Authority

Mineral Wool Insulation or EPS Insulation

By Jub Systems • January 11, 2023
When choosing to have an EWI system installed on a property, one of the first things that need to be decided is choosing the type of insulation. The market currently is overflowing with choices when it comes to insulation materials. Usually, the decision comes down between Mineral Wool or EPS as they are the most common materials in the UK.  How do you know which of the two will be more suitable for the property? In this blog article, we will cover the different characteristics and core differences between Mineral Wool and EPS to help you make the right decision.
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