Water damage poses a significant environmental threat to buildings, capable of impacting structures across various environments and causing extensive damage unnoticed. Therefore, choosing appropriate building waterproofing materials is very important.

With a plenty of waterproof membranes available to construction firms, each presenting unique attributes, project managers must carefully assess the following seven considerations to ensure optimal selection.

1. Costs

Cost is perhaps the most straight forward factor when considering materials. With only 8.5 percent of construction projects completing on schedule and within budget, teams strive to avoid overruns whenever feasible.
Assessing waterproofing material costs goes beyond simple comparisons of square footage prices. Certain materials may include higher initial costs but require less maintenance, thereby reducing long-term operational expenses for buildings. Additionally, if a pricier material is  easier to install, it could yield long-term savings by minimizing labor costs.
Project managers must also evaluate whether multiple layers or additional infrastructure are necessary to implement a waterproofing system. Some suppliers may offer bulk discounts for specific materials, impacting overall costs, thus project scale should also be consider into the equation.
  

2. Ease of Installation  

Another crucial aspect to consider is the ease of installation of a waterproof membrane. Apart from reducing labor expenses, systems that are easy to install offer several significant advantages compared to their more complex counterparts.

The complexity of an installation directly correlates with the likelihood of errors occurring. Given that rework constitutes 9 percent of total project costs, avoiding such errors can result in substantial time and cost savings. It’s important to note that error prevention also relies on the workforce’s level of experience. The ease of installation may depend on the team’s familiarity with the material.

Installation failures have repercussions beyond project costs alone. An improperly installed membrane is more prone to leaks, posing risks to the building’s future occupants and loose the reputation of the construction firm.

3. Above-Grade vs. Below-Grade  

Project managers must also take into account whether their building waterproofing materials are intended for above-grade or below-grade applications. While it may initially seem that any reliable system should effectively block water regardless of its location within the building, this is not always the case.

Above-grade applications, such as rooftops and balconies, are typically exposed to significant temperature variations. Therefore, the materials used must be capable of withstanding a wide range of temperatures, including below-zero conditions. Additionally, exposed membranes must possess UV resistance and be aesthetically pleasing.

On the other hand, below-grade waterproofing does not require UV protection, aesthetic appeal, or extreme temperature resistance. However, it often presents a more complex challenge. It must effectively adhere to the building’s foundation, prevent the infiltration of harmful solvents, and resist sinking.

4. Site-Specific Environmental Concerns  

Similarly, environmental factors vary from site to site, influencing the effectiveness of waterproof membranes. Variables such as heat, rainfall, humidity, and other climate-related elements can impact the membrane’s performance, necessitating adaptation to site-specific conditions.

Projects situated in areas with heavy rainfall or in proximity to bodies of water, which may result in saturated ground, typically require more robust waterproofing solutions. Buildings located in regions with intense sunlight demand waterproofing materials with enhanced UV and temperature resistance, particularly for above-grade applications. Additionally, seasonal weather hazards such as hurricanes and flooding must be taken into account during planning.

Construction teams should anticipate more extreme conditions to enhance building resilience to climate change. This is especially for projects in northern regions of India and mountainous areas, where temperature fluctuations are more pronounced compared to other states.

5. Material Durability and Longevity  

Construction firms should also assess the durability of various materials. While suppliers may not always provide specific longevity figures, project managers can employ several methods to evaluate durability.

Waterproof membranes with fewer seams typically exhibit greater longevity, as they have fewer weak points. Consequently, liquid membranes may prove more durable than solid ones, provided an adequate number of layers are installed. Redundancy is another critical consideration. Materials such as thermoplastics are often single-layered, lacking redundancy and thus potentially more prone to failure.

Although the most durable materials may have higher initial costs, the resulting benefits offset these expenses over time. Enhanced durability translates to fewer repairs and reduced energy consumption, ultimately lowering ongoing costs.  

6. Compatibility With Other Materials  

Compatibility with other project components is essential when selecting building waterproofing materials, with binding being the primary concern. The membrane must adhere seamlessly to the surfaces it protects to prevent the formation of bubbles or air pockets that could compromise its efficacy.

Furthermore, it’s crucial to anticipate how other building materials may evolve over time. For instance, bamboo, while sustainable, may shrink as it dries, potentially weakening joints and affecting the adherence of a waterproof membrane. This could result in the membrane detaching or warping, diminishing its effectiveness.

Once project teams have identified the materials for different building components, they should research how these materials may interact with various waterproofing systems. Some solutions may exhibit superior binding properties with specific materials, highlighting the importance of selecting the most suitable option for each project.
  

Find the Right Waterproof Membrane  

Selecting the appropriate building waterproofing materials for a project involves more complexity than it may initially appear. Project managers equipped with comprehensive knowledge of key considerations can initiate early planning and address all pertinent factors to avoid costly errors.

Effective waterproofing systems play a pivotal role in project success. They have the potential to reduce costs, streamline processes, ensure regulatory adherence, and safeguard future occupants of the building. Investing time in selecting the optimal method not only facilitates smoother workflow but also yields long-term dividends.

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