Building materials


How Can External Wall Insulation Improve Energy Efficiency and Visual Appeal?

External wall insulation (EWI) is a process that involves applying expanded polystyrene or phenolic foam to the exterior of buildings, topped with a reinforced cement-based, mineral, or synthetic finish. Its primary purpose is to improve the energy efficiency of a building by reducing heat loss through the walls. You might be wondering how it can help improve your home’s visual appeal. At Renders World, we are experts in external wall insulation, so read this handy guide to learn more.

Insulation Thickness and Considerations

The thickness of the insulation depends on achieving a U-value of 0.25-0.3 W/m2K, in line with current Building Regulation standards. Other factors such as exposure, durability, and potential vandalism are also taken into consideration when determining the insulation thickness.

Traditional and Alternative Finishes

EWI systems consist of an insulation layer and a weatherproof finish. Traditional finishes include dry-dash render, scratch plaster render, and textured coatings. Dry finishes are fixed to the substrate using independently fixed timber battens. Certification by a notified body is required for any installed system. Additionally, there are alternative options available, such as brick slips, simulated brick and stone renders, tiles, timber boards, aluminium or uPVC sidings, and traditional tile hanging finishes, providing homeowners with a range of aesthetic choices.

Benefits of External Wall Insulation

External wall insulation offers numerous benefits. It significantly improves the thermal performance of a building, reducing heat loss and lowering energy bills. It also helps to reduce carbon emissions, making it an environmentally friendly choice. Furthermore, External wall insulation can enhance the appearance of a building, giving it a fresh and modern look.

Considerations for Proper Installation

Proper design and installation are crucial to avoid rain penetration problems and ensure the effectiveness of the system. External wall insulation should only be applied to walls that do not suffer from dampness. It is also important to address any existing damp issues in poorly maintained walls before installing external wall insulation.

Visualise and Calculate

To help customers achieve desired colour combinations, we provide a colour chart for both CERESIT and ATLAS renders on our website. We also offer a fasade designer tool, allowing customers to experiment with different colours and finishes. Additionally, if you are unsure about the quantity of materials needed for your project, we offer a materials calculator and a cost calculator on our website. These tools can help you estimate the amount of insulation and rendering materials required, as well as the cost of the project.

Enhance Your Home’s Aesthetics With External Wall Insulation Today

We hope this article has helped you understand how external wall insulation can help improve your home’s aesthetics and visual appeal. If you want to find out more, speak to one of our friendly team at Renders World. Call us on 02382 002442 and our team will help answer any questions you may have.

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