Last updated on 27th April 2026 by ProGuard Exteriors

ProGuard Exteriors were trusted to restore a large detached property in Kings Langley that was suffering from failed sand and cement render along with widespread flaking paint.

The condition of the existing finish was affecting both the appearance and performance of the home, requiring a thorough preparation and coating solution.

Overview

The property was a large detached house in Kings Langley with external walls that had been affected by failed sand and cement render and flaking paint. Before any new finish could be applied, the walls needed to be cleaned, assessed and repaired to create a sound surface for the new coating system.

The homeowner required a long-life, low maintenance finish that would improve the external appearance of the property while also helping to improve energy efficiency. ProGuard Exteriors specified a detailed repair and CorkSol spray render coating process to restore the exterior properly.

Our Response

The ProGuard team began by pressure cleaning all external walls to remove dirt, algae and loose paint. This process helped reveal areas where the existing finish had failed and made it possible to identify any loose or flaking paint that needed to be dealt with before coating.

Once cleaned, the walls were tap tested to locate blown render. Any failed render was removed back to a sound base coat and the required repairs were carried out. After the repair works were complete, a universal high bonding primer was applied to all external walls, creating a suitable surface for the CorkSol coating system.

Our gallery above showcases the Kings Langley exterior renovation, including pressure cleaning, removal and repair of blown render, careful protection of windows and doors, and the application of three coats of CorkSol spray render in the client’s chosen colour.

Final Specification

Pressure Cleaning: Cleaned the external walls to remove dirt, algae and loose paint while exposing underlying problem areas.

Render Testing and Repairs: Tap tested the walls to identify blown render, removed failed areas back to a sound base coat and completed repairs as required.

High Bonding Primer: Applied a universal high bonding primer to all external walls to create a suitable surface for the CorkSol coating.

CorkSol Spray Render: Masked and protected all windows and doors before applying three coats of CorkSol coating in the client’s chosen colour.

Benefits Achieved

The completed works restored the exterior of the property and provided a long-life finish designed to reduce ongoing maintenance.

Restored External Appearance: Failed render and flaking paint were addressed before the new coating system was applied.

Improved Energy Efficiency: The insulated CorkSol coating helps improve the home’s energy efficiency.

Low Maintenance Finish: The finished exterior removes the need for ongoing painting and reduces future maintenance demands.

Long-Life Coating: Three coats of CorkSol coating created a durable finish across all external walls.

Why Use ProGuard Exteriors

For properties with failed render and flaking paint, preparation is essential. ProGuard Exteriors manage the full process from cleaning and assessment through to repair, priming and final coating application.

Detailed Surface Preparation: Walls were cleaned, tested and repaired before the coating system was installed.

Careful Protection: All windows and doors were masked and protected before spraying began.

Complete Coating Solution: The team completed repairs, priming and three coats of CorkSol spray render as one coordinated process.

Colour of Choice: The CorkSol coating was applied in the client’s chosen colour for a clean and consistent finish.

Why It Matters

When sand and cement render begins to fail, simply painting over the surface will not solve the underlying issues. By removing blown render, completing the required repairs, applying a high bonding primer and finishing the walls with CorkSol spray render, ProGuard delivered a durable, insulated and low maintenance exterior for this large detached property in Kings Langley.

Request a free site survey and no-obligation quote today to see how ProGuard Exteriors can support your next exterior renovation project.

ProGuard Exteriors provide CorkSol spray render, exterior wall coatings, render repairs and energy efficiency upgrades for homes across Hertfordshire and surrounding areas.

Whether you’re located in Kings Langley, Hemel Hempstead, Watford, St Albans, Tring, Berkhamsted or nearby areas, our expert service makes us your go-to choice for spray render coatings and exterior wall renovation solutions.

Contact our team to discuss failed render repairs, CorkSol coatings and low maintenance exterior renovations across Hertfordshire, Buckinghamshire and Oxfordshire.