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Damp Proofing External Walls: Top Tips and Tricks

Damp Proofing External Walls

Picture the scene: You know that your masonry is in serious need of an update, but like most things in life, the task facing you seems overwhelming.

Should you chance a D.I.Y attempt, or is it better to leave it to the experts?

Yes, you can always go to the store, buy some products, power wash your outside wall, and try to do it yourself. But if not done properly, damp proofing external walls is useless. In other words, you may be able to pull it off in practice, but long-term, it won’t be nearly as effective as when a contractor installs it correctly.

Damp proofing walls will protect your home from moisture, and any resultant damage from damp. Exterior walls that are made from concrete, bricks, and similar material are porous. In other words, they invite moisture if not untreated. Here’s how the process goes…

Damp Proof External Walls: Key Causes

Before you start thinking about insulation and damp proofing, you need to understand what type of damp you are faced with. There are two main types of damp, rising damp, and penetrating damp.

Check if there is a damp proof course installed in your home. If there is not damp proof course that is properly bridged, you will notice salts on the inside of your walls.

These salts make up a crystallised powder, that appears on plaster if there is no protection against rising damp. The plaster usually requires removing, and a new damp proof course needs to be installed.

Penetrating damp, or condensation, manifests as black mould and spots of mildew. Sometimes, mould is accompanied by musty smell and there is something against the wall. One of the solutions for penetrating damp is better ventilation, but damp proofing external walls is a much more efficient solution.

Should you Do It Yourself?

We mentioned at the beginning of this article that sometimes, damp proofing can be done as a D.I.Y project. But we are highly against it. We recommend you never do it on your own.

The reasons are many, but for starters, damp proofing requires usage of special chemicals. They need to be carefully handled, and they can be dangerous.

Yes, buying a silicon gun and products in tubes might be a cheap solution. But ask yourself, would you really like to do it over and over again until you get it right?

The Problems with Damp

There is a reason why damp proofing external walls is important. Damp and mould can be serious problems, with hazardous implications for your health. The problem occurs when your external walls are exposed to water.

This is usually rain, but it can be from another water source as well. The water can enter your masonry, and travel laterally form the external, to the internal walls. If there are cracks in the bricks, they are letting the water in.

In some cases, if there is a constant flow of rain, your walls might stay damp, and not get the opportunity to dry out. As a result, your home’s thermal conductivity is radically reduced.

Cracks in pointing and brickwork affect the overall water absorbency of your walls. Different areas absorb water differently, with some absorbing more than others. The result is damp patches, due to penetrating damp.

In other instances, some areas are more exposed, or more susceptible, to water, and the result might be a large, damp area appearing. The dampness can spread to the internal walls, resulting in damp patches inside as well.

Damp patches contain salts that have washed out of the brick. They can erupt through the paint, and blow the plaster. Sometimes, damp patches are cold spots on the wall.

As a result, you lose 3 times heat faster than the surrounding wall. Cold spots allow even more moisture from your internal air to form condensation. In the spirit of the “rich are getting richer” your damp walls are getting damper.

As for damage to the external walls, when water gets into the brickwork, cracks appear. The action, referred to as the ‘freeze-thaw’ effect, allows more water in, gradually making the problem worse with each passing day. And mould can grow on the outside walls as well, further reducing the visual appeal of your home.

Damp Proofing External Walls

Wall Insulation for External Walls

The solution we offer will help you prevent moisture, dampness, and condensation problems. Our insulation is designed for any porous building material, be it bricks, concrete, or stones.

The wall insulation chemically bonds to the surface, penetrating up to 17mm deep, and creating an invisible insulation barrier.

This barrier protects your home from moisture, but also from heat loss as well. We all know heat leaves your home through the walls due to poor insulation. But with our wall insulation, that will be a thing of the past.

Wall insulation for external walls can reduce the water absorption by more than 95%. As a hydrophobic coating, the insulation repels all water, be it from rain, or any other liquid source.

In addition to water and rain, the insulation will protect your external walls from dirt, algae, pollution, oil, and many other problems.

The insulation material has a lifespan of 20+ years, making it perfect for homeowners that want to live in the same house for many years to come, safe in the knowledge that their property’s protected.

And even if you decide to sell your property at a later date, wall insulation increases the value of your home immeasurably.

As a powerful insulator, the product allows your home to breathe and makes it permeable to water vapour. In the same time, the insulation allows air and moisture to pass from one side to another. As we know, breathable brickwork has better thermal conductivity and insulation properties overall.

As for damp problems, just 5% of damp content in your home will reduce the thermal resistance by up to 50%. The best part is that wall insulation for external walls is 100% self-cleaning!

By bonding with the surface, the product does not allow dirt particles to get a hold on the brickwork. They just flow off with rainfall.

How does Wall Insulation Prevent Damp?

Installing wall insulation will help with the present damp problem you’re currently facing, and prevent future damp problems from occurring. The installation process includes cleaning up and repairing walls, before applying the coating itself.

Our expert team of contractors will inspect your walls, clean them, repair any cracks that allow moisture to pass, repair the render if needed, and only then apply wall coating.

The primer coat is adhered to the wall surface, the before regular coating is applied. This primer coat ensures an excellent bond between the surface, and the substrate, as well as a impressively, long lasting finish.

The coating application, on the other hand, includes a protective wall coating that’s offered in a comprehensive range of colours and textures. Using industrial machinery, we will make sure you get high quality finish you deserve.

External Wall Insulation Installers

At the very end of the installation process, you can carefully inspect the cleaned site. If there are any problems you notice, the team will repair them as well.

Still hankering after more expert advice on improving your property’s exterior? Simply by calling 0800 1700 636, or click the button below to get started today!

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