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CONQUERING DAMPNESS & MOULD: A Guide to Damp Proofing in Homes

INTRODUCTION: Dampness and mould are common challenges that tenants and homeowners face. It can be very stressful to get to the cause of the issue, but with the right approach, it can be effectively managed and prevented.

In this blog post, we'll delve into some of the causes of dampness and mould in homes and explore practical damp proofing solutions in order to keep your living space healthy and mould-free. KCJ Builders pride ourselves in our expertise around tackling Damp and mould. So, first thing's first, we need to understand the problem to work out the cause of the issue.

UNDERSTANDING THE PROBLEM: Dampness and mould thrive in environments with excess moisture, which can be caused by various factors such as water leaks, poor ventilation, condensation, or rising damp from the ground. If left untreated, dampness and moisture can lead to mould growth, causing an array of issues from staining and structural damage, to both mental and physical health issues for occupants.

IDENTIFYING THE SIGNS: Signs of dampness and mould include musty odours, visible damp patches on walls or ceilings, peeling or bubbling paint or wallpaper, and the presence of mould or mildew. If you notice any of these signs, it's essential to address the underlying causes promptly to prevent further damage and health risks.


1.      Identify Existing Leaks: Inspect your home for any leaks in plumbing, roofs, or windows, and aim to repair them promptly to prevent water infiltration.

2.      Improve Ventilation: Proper ventilation is absolutely vital to reducing moisture levels indoors. Install extractor fans in kitchens and bathrooms, open windows daily, and use dehumidifiers in areas prone to dampness.

3.      Seal Cracks and Gaps: Seal cracks and gaps in walls, floors, and around windows and doors to prevent water ingress and reduce heat loss, which can contribute to condensation.

4.      Install Damp Proof Course: In cases of rising damp, it is advisable to install a damp proof course (DPC) to prevent moisture from rising up through the walls. This can involve injecting a chemical DPC or installing physical barriers.

5.      Use Damp Proof Paint: Apply damp proof paint or coatings to walls and ceilings in areas prone to dampness, such as basements or bathrooms, to create a moisture-resistant barrier.

6.      Maintain Gutters and Drains: Keep gutters and drains clear of debris and leaves to ensure proper drainage away from the foundation of your home, preventing water accumulation and potential damp problems.

PREVENTING MOULD GROWTH: In addition to damp proofing measures, it's essential to take steps to prevent mould growth:

  • Keep indoor humidity levels below 60%.

  • Clean and dry any spills or leaks promptly.

  • Regularly clean and ventilate areas prone to dampness, such as bathrooms and kitchens.

  • Use mould-resistant paint or wallpaper in high-humidity areas.

CONCLUSION: Dampness and mould can be challenging issues to tackle, but with proactive damp proofing measures and proper maintenance, you can create a healthy and mould-free home environment for you and your family. By identifying the causes of dampness, addressing them promptly, and implementing preventative measures, you can safeguard your home against moisture-related problems and enjoy a comfortable and safe living space for years to come.

One of our specialties at KCJ Builders is Damp Proofing and Timber Preservation, we have a team of professional’s that can help you with any of the below:

  • Damp Proofing & Control Measures

  • Rising Damp & Penetrating Damp

  • Wet Rot & Dry Rot Treatment

  • Timber Insect Infestation

  • Condensation Control

  • Structural & Basement Waterproofing


We are one of the leading damp proofing specialists in the North West London area. Our certified Surveyors understand that damp does not only have a visual impact, but also physical, contributing to several health problems. 


Our damp and timber reports are prepared by fully qualified remedial surveyors. We will provide detail reports and quotations clearly stating any proposed or needed works, along with detailed specifications and quotations.

Please get in touch today to speak with one of our team. For more information, please click here.


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