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How Do You Damp Proof a Wall?

If you've ever asked yourself, "How do you damp proof a wall?" you're not alone. Dampness can be a persistent problem that can degrade the structure of your home, lead to unsightly patches, and even pose health risks over time.

Choose the Right Products

First things first, it's essential to pick the correct products for damp proofing. One of the best on the market is Dryzone DPC Damp Proof Injection Cream. Unlike traditional methods, Dryzone comes in the form of a water-repellent cream packed in a 600ml foil cartridge. It is water-based and contains no hydro-carbon solvents, reducing environmental impact. The cream is simply injected via a straightforward applicator gun into holes drilled into the mortar course, creating a damp-proof course in your walls. It's ideal for situations where electricity is not available, as it doesn't require an electric DPC pump.

Remember, if you want genuine results, genuine Dryzone is the way to go.

Common Mistakes to Avoid

If you have tried to damp proof a wall in the past but failed, it's likely that you may have missed a crucial step or used inferior products. Remember to follow the manufacturer's guidelines carefully, especially when you're doing this as a DIY project.

So, if you'd like to damp proof a wall yourself, make sure to use tried and tested products like Dryzone and adhere to all the instructions for optimal results. A well-executed damp proofing not only preserves the integrity of your walls but also makes your home a healthier place to live.

Step-by-Step Instructions

To damp proof a wall, follow these simple steps:

1. Identify the Affected Area: Locate the area where damp is prevalent. It could be near the floor, around windows, or even higher up on the wall.


2. Preparation: Clean the wall surface and remove any loose plaster or paint. This ensures that the Dryzone DPC Damp Proof Injection Cream can penetrate effectively.

3. Drilling: Drill holes into the mortar course where you intend to inject the cream. The holes should be about 10-12mm in diameter and spaced around 100-120mm apart.

4. Application: Using the applicator gun, inject Dryzone cream into the drilled holes until they are filled.

5. Seal: Once the cream is injected, seal the holes with mortar to complete the damp proof course.

6. Monitoring: Keep an eye on the treated area for a few weeks to ensure that the damp proofing has been successful.


If you have any questions about the products listed in this blog, please get in touch at or call 0800 111 4898.