Why You Should Use More Than One Waterproofing Method

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Harry's Home Improvement Blog

Hello, my name is Harry and this is my home improvement blog. Welcome! On this blog, I will be discussing many different home improvement and construction topics. I should explain that I am not a professional contractor. However, I have just come to the end of a home renovation project which took over 2 years to complete. During that time, I worked with dozens of different contractors in order to get my house into shape. I have spent hours working alongside plumbers, electricians, surveyors and roofing specialist. I learnt so much about their different trades that I decided to start this blog.

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Why You Should Use More Than One Waterproofing Method

22 August 2017
 Categories: Construction & Contractors, Blog


It is normally advisable for you to combine more than one waterproofing method when you are constructing a building whose basement will be used for a variety of applications, such as a car park or offices. This article discusses some of the key reasons why combining waterproofing methods is advisable.

100% Performance Isn't Easy to Attain

Basements can be waterproofed in several ways. For instance, a barrier can be installed inside or outside the structure in order to keep moisture away. Alternatively, the structure can be built to be watertight so that hardly any moisture can get in. 

However, it is very hard for any option selected to deliver total waterproofing. For instance, a barrier installed in the foundation can crack and allow moisture to seep into the basement. Relying on only one waterproofing method can therefore lead to disappointments when imperfections in that system become apparent later on as water ingress begins. 

Combining more than one waterproofing system gives better results because each method will cover the weaknesses of the other method used. For example, a waterproofing membrane applied inside the basement can keep away any moisture that escapes the barrier applied on the exterior surface of the basement's foundation.

Variations in Ground Conditions

Waterproofing methods are normally selected after conducting comprehensive hydrological (groundwater), geological (soil type) and topographical (physical features) investigations of the installation site. However, those conditions can change later on and render the option selected to be ineffective. 

For instance, the area may later have several high-rise buildings that create a lot of water runoff in low-lying areas. The waterproofing method that was effective before those buildings were constructed can then become ineffective in the face of the elevated soil moisture. Using more than one waterproofing technique can avert the moisture problems that can result when one method becomes overwhelmed as a result of the changing conditions at the site.

Ease of Maintenance or Repair

Another key reason why you should use more than one waterproofing method is the options that it allows you when the system needs to be repaired. For instance, it may be hard for you to excavate and repair the waterproofing that was installed before the foundation was backfilled. However, you can strengthen the other waterproofing method that was used, such as a membrane on the basement walls, in case the foundation is inaccessible. Having several methods of waterproofing can often eliminate the need to reinstall the entire system in case defects are observed. The different techniques can be patched up in order to provide a combined performance that addresses your needs.

Are you having waterproofing problems in your basement? Talk to an expert so that he or she can inspect your home. Appropriate remedies can then be recommended so that you can have a lasting solution to the moisture problem.