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How To Combat Rising Damp

Best Practice To Combat Rising Damp

For property owners, getting a rising damp problem is a stressful situation. The damage it causes, and the works required to fix the problem, are disruptive.

rising dump

Treatment involves the removal of damp-affected plaster and the drilling of holes into masonry to inject a DPC cream. This creates dust and noise, and the affected room is usually off-limits to the property owner for a few days whilst the replastering is carried out.

A good high-strength damp-proofing cream, such as Dryzone Damp-Proofing Cream, will create a long-lasting barrier to rising damp.

Given all of the above, some property owners are shocked to find that the rising damp returns a few years after treatment. This means it is important to ensure that rising damp repairs work first time around. Not only to lower the stress level of your customers but also maintain your reputation and minimise call backs and repair costs.

Why do rising damp treatments fail?

The vast majority of rising damp treatments are carried out using a damp-proofing cream that is injected into holes drilled along a mortar course on the affected wall. This is the most common point of failure. Usually the failure occurs because either a low-strength damp-proofing cream has been used or the application of the damp-proofing cream has been carried out incorrectly.

Strength in numbers

Not all damp-proofing creams were created equal. Every variant of damp-proofing cream contains a certain percentage of active silicone ingredient that diffuses along the mortar course and cures to become water-repellent. A good high-strength damp-proofing cream, such as Dryzone Damp-Proofing Cream, will create a long-lasting barrier to rising damp. Some creams on the market, however, contain less than 15 per cent active ingredient. When those low-strength creams were tested in laboratory conditions against Dryzone Damp-Proofing Cream they were shown to not diffuse far enough and proved to be ineffective at combating rising damp, even though they had the same UK certification as the high-strength creams.

Operator error

Even if the correct high-strength cream is used, operator error can still cause failure of the damp-proof course. The most common installation error is under-treatment. This usually due to not injecting enough cream in the drill holes or injecting material into a void. If these kinds of errors are made, then not enough active ingredient will be able to diffuse along the mortar course and the damp-proof course will fail.

The most common installation error is under-treatment.

Stick it to rising damp

One way to avoid both of the above mistakes is to use Dryrod Damp-Proofing Rods. These patented fibre rods are directly impregnated with the correct amount of active ingredient to treat rising damp. Just like damp-proofing creams, they are inserted into holes drilled along a mortar course.

As Dryrod Damp-Proofing Rods are directly impregnated with the active ingredient, their performance is as good or better than the highest performing damp-proofing creams. They also contain exactly the correct amount of active ingredient for their given length, ensuring the right amount of material is delivered and under-treatment is not a worry.

Rods for re-treatment

If it is required to re-treat an already failed chemical damp-proof course using damp-proofing creams, it is necessary to drill holes on a new mortar line. The unique formulation of Dryrod Damp-Proofing Rods, however, means that they can be inserted into the original treatment holes, making repairs far easier.


Original article published at www.probuildermag.co.uk


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