Balcony Waterproofing

Balcony waterproofing: How to proceed when water flows from the balcony

If your house has a wooden balcony, you should face water leaks at least once. Wooden balconies are prone to water leaks, damage and malfunctions. As a result, it is crucial to waterproof the balcony.

Balcony waterproofing is an extremely useful strategy to prevent balcony rot. Balconies are most vulnerable to water leakage because they are highly exposed to sewage systems. Because a different balcony is built differently, an expert can best guide you in waterproofing your balcony.

Balconies also need an adequate drainage and prevention system inside the water. Waterproofing of balconies can meet these requirements. We will know more about why balconies are so prone to leaks and how we can waterproof our own balcony.

Reasons behind the leak in the balcony

The most common reason for water leaking from the balcony is the actual construction of the balcony. Most of the time, the construction of the balcony is handed over to an inexperienced entrepreneur. This results in a very weak foundation of the balcony.

Poor construction also includes a lack of proper planning and execution by the contractor. Moreover, some contractors may use substances that are incorrect for your private balcony. Sometimes the substrate may also be unable to accept the waterproof coating of the membrane.

As already mentioned, the drainage system under the balcony is absolutely crucial. Therefore, if there is a problem with the drainage system, there will be leaks and your balcony will be damaged by moisture.

Having an adequate waste management system is extremely important. Only a proper drainage system can prevent water from leaking onto your balcony. There must also be an adequate waste management system. This includes appropriate dumping of rubble, and no waste can cluster near and under the balcony.

Finally, proper maintenance and waterproofing are incredibly important for a moisture-free balcony. If you can't take care of your balcony properly, there will be leaks at any point in your balcony's life.

Balcony waterproofing: Tested process

Several things will need to be considered when waterproofing a balcony. Here are some instructions you can follow for any kind of balcony.

Start with the structure

There are several membranes that can be used in the waterproofing technique. However, if the foundation of the balcony is not correct, there will always be leaks. Wrong nail and improper structure can destroy the membrane cover.

International and national guidelines must be followed in the construction of the balcony. There are several codes and standards set by the local authority. For example, there should be a minimum and maximum slope for the balcony floor. Residential construction should meet standards at all costs.

In addition, the structure of the balcony must also contain enough space for the cover plate. This is crucial as it will prevent water from entering the house. If preservatives are added to the wood, it can better prevent water leakage. However, it is recommended to cure the problem rather than prevent it.

Flashing opening

This is the first stage of waterproofing. Most leaks take place directly under the door. Some common reasons behind the leak are not the placement of the sill in a sealing material, the top is exposed and an open blink.

In some cases, the turn signal may be damaged. Therefore, the next task here is to seal these flashes. If there are no openings, the water will stay out and will not enter through the balcony.

Intermittent perimeter

In this step, the perimeters of the balcony should include intermittent. To increase the robustness, tin can be used. This sheet can be subsequently covered with a liquid membrane.

The turn signal must be large enough to cover the edges, turns and seams. One of the common places where leaks occur are the edges. The edges must be properly sealed. Often, the edges rot and water flows from the balcony. Therefore, it is crucial to apply sheet metal on all edges.

Both the designers and the construction company should have adequate communication on this. Sometimes, only the designer may not be able to determine the problem. As a result, proper investigation and execution to seal the edges.

Install the deck membrane

Of all, it is the easiest task to waterproof your balcony. However, it is mandatory that the above processes be performed correctly before installing a membrane over the balcony deck.

There are several types of membranes available on the market. You will need a different type of membrane for wood and concrete. Sometimes damage can be found. To prevent this, the concrete can be placed over the membrane immediately after the membrane is applied.

T bar installation

Placing concrete seals over the membrane is a good idea. However, you can take another step before doing so.

T-bars are something that is installed around the edges of the balcony. It is a permanent seal of the edges. There are 2 styles of T-bars available.

The first is with crying holes. These holes direct the water into the T-bars and cry immediately. The other T-bar is the one placed above the intermittent edge. This type of T-bar drains water from under the balcony.

Railing anchor installation

Sometimes the concrete can get damaged and water can pass through the membrane. In such situations, the railing anchors can be fixed to the balcony deck. This can be done by incorporating a plate with the railing post.

Location of the concrete topping

A thorough inspection must be carried out before carrying out this part. If there are holes across the membrane, they must be sealed. After that, the membrane must be covered with concrete.

Concrete lining may not be an indispensable part of waterproofing. However, it can protect the surface and membrane from water.

Different types of balcony waterproofing techniques and their cost

There are several types of applications available for waterproofing a balcony. Depending on the technique you choose and what your balcony requires, the overhead will be determined.

Liquid membrane waterproofing

The liquid membrane waterproofing technique is the most common type used worldwide. As a result, it is available almost anywhere. Also, any professional would suggest you get liquid membrane waterproofing if your balcony requires minimal waterproofing. The total service will cost you around $ 200 to $ 300.
Polyurethane waterproofing

If your balcony is made of concrete, polyurethane is the way to go. Any small to large crack can be fixed and covered with polyurethane. Therefore, the price of this technique is certainly higher than most others. A wooden surface can be better covered with polyurethane than other waterproofing techniques.

Waterproofing of bitumen

This is a material that is very protective against leaks. It will seal your roof and balcony floor, whether they are made of wood or concrete. However, the waterproofing technique is not so high. You can expect to pay around $ 200 for the full service.

Waterproofing with cement

This is another membrane protection for your balcony. The membrane is liquid. As a result, concrete walls and roofs can be covered with cement waterproofing at a low cost expense. You will have to pay a maximum of $ 300 for 5 gallons of the cement container.

Tin membranes

This is the least used technique for waterproofing a balcony. If the balcony is underground and expensive, this is the best possible technique to use. One problem with this technique is that there is still a chance that water will enter if there are leaks.

Factors affecting the cost of waterproofing a balcony

You may have already determined the cost of waterproofing in all techniques. However, there are a few other factors that have an impact on overhead.

The size of the project

We are not talking about the size of the balcony here. Sometimes even a small balcony can require complex waterproofing work. Many of the things depend on the result of an installer's examinations. If your balcony is already leaking, an installer may need extra time to find the root cause. This will increase the overall cost of waterproofing the balcony.


Location also plays an important role in determining cost. Many things depend on weather, humidity, water flow and material availability. Moreover, the physical location of the house is also very important. A plumber will have to think and work differently for a house that is on a beach. On the contrary, a house with a balcony inside a city may require a different technique.

Used materials

There are several waterproofing techniques, as already mentioned. These techniques use different materials for the process. The prices of the techniques actually depend on the materials used for the process. Some substances will be more functional, which will seal the walls and roofs of balconies better than others. Of course, something so effective must be expensive.


Waterproofing the balcony is an important thing. Your home is the result of your hard work and precious money. Moreover, the houses are built with a lot of passion and prior planning. So you need to be completely dedicated to waterproofing the balcony. Always pay close attention to detail and hire the best professionals for this position.

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