What Is Interior Waterproofing?

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It is the process of re-routing the water that leaks into a basement out and away from home. The drainage system for interior waterproofing is made up of several pipes that catch the leaks. They are installed under the floor along the foundation to collect excess rainwater. It then flows into a sump pump in your basement and then is pumped out of the house. 

Another part of interior waterproofing involves a vapour barrier. Vapour barriers are plastic or rubber-like material that is installed along the wall of the basement. These barriers are designed to keep the leaks and moisture and take it down into the drains installed under the floor. 

Interior waterproofing is not only important if you have noticed signs of water in your home’s basement, but it is also important to prevent possible future damage to your home. 

You may want to consider interior basement waterproofing if you desire a dry basement to use for storage or remodel into an entertainment area or family room. It is essential to understand that basement waterproofing is not a simple task. Water intrusion of any kind in the basement of your home can be disastrous. Therefore, consider contacting a basement waterproofing professional to examine your basement at the first sign of cracks and leaks.

A wet or leaky basement is a matter of significant concern for any homeowner. What might appear to be a slight trickle or leakage can turn out to be a warning sign that might require instant action on your part. The presence of moisture in the basement area of your home can lead to an array of expensive as well as time-consuming repairs. From the formation of toxic moulds to structural damage to your house, water in the basement can turn out to be a significant issue. 

What you need is basement waterproofing to solve your problem. The question arises, “how does basement waterproofing work?” We will help you discover some of the secrets behind basement waterproofing and what measures to take if you ever need it. At MJS Construction Group, we offer a wide range of home builders Melbourne.

Interior Basement Waterproofing Systems

A simple DIY interior repair and an expensive, short-lived exterior waterproofing is no comparison to an interior basement waterproofing system. It may be the smartest and most effective choice out of the three methods.

Imagine a waterproofing system that removes water as effectively as an external drainage system without the concern of loose, soft soil that surrounds it in the hydrostatic zone, wearing it away. Exterior systems tend to clog with dirt and rocks. There is also a possibility of root intrusion and grading the perimeter again after 8 to 10 years.

An interior basement waterproofing system can manage water under your floor effectively by removing groundwater before it touches your floor. Some systems sold by large franchises manage water at almost floor level, defeating keeping moisture out and keeping walls and floor dry. Make sure you get a system that manages water in the proper location under your floor. 

The beauty of it all is that you don’t lose any of your landscaping outside with an exterior excavation project. Most interior waterproofing systems are installed in 2 to 3 days when done correctly.

The installation of a sump pump is also as important as the interior basement waterproofing system itself. When installed correctly, it will remove thousands of gallons of water an hour through a discharge pipe that leads to an outside drainage basin. 

Some basements don’t require a sump pump station if drain grates are in the basement floor centre. Those grates have a drainage path below the floor that leads away from the foundation. Sometimes they are not enough to get the groundwater that leaks through the area between walls and floor.

It comes down to who is selling you a waterproofing system. Currently, interior basement waterproofing is unregulated, so there are plenty of shady characters out there dying to sell you one. First, do your research before anxiously making a decision. 

If you want to stop your water problem, install a robust system that requires zero maintenance. If it requires maintenance and special flooring, you will be paying for your system for the rest of your life. Install the right basement waterproofing system in your basement for the best results.

Interior Waterproofing Prevents Problems in Your Home:

  • leaks
  • mould
  • mildew growth
  • water leaking into your home
  • structural damage
  • property damage

Not all interior waterproofing methods are recommended. It is best to have your basement or crawl space evaluated by a professional to determine the best course of action for your home’s needs.

Having A Interior Waterproofing 

what is internal waterproofing

Investing in interior waterproofing for your home greatly reduces the likelihood of your basement flooding. Plus, the drainage system is easy to have installed and costs less than exterior waterproofing. 

Here are some other great reasons for interior waterproofing your home:

Get Rid of Dampness

If your home is damp, you open up the risk of developing mould and mildew, which can be problematic. Installing interior waterproofing in your home eliminates both of these issues. Additionally, it ensures the water that gets through the wall is contained. Furthermore, it keeps the moisture levels stay down, making the basement smell better and be more functional. 

Cost-Effective and Efficient 

Installing interior waterproofing in your home is one of the most cost-effective ways to handle basement water, and it can be installed quicker. Once the system is in place, you can stop worrying about water issues in your basement. 

You do need to remember that this is simply redirecting the water back out that is getting through the wall as opposed to an exterior waterproofing that prevents the water from ever getting in. But sometimes, exterior waterproofing is not always able to be done or can be higher cost, so the interior is a good solution.

Protect Your Basement Floor 

Basement floors are made of concrete that is between 3-4 inches thick. If groundwater swells up beneath it, the floor can crack or find its way in. Cracks in the floor can lead to seepage and flooding. Having an internal waterproofing system can stop this issue before it starts, giving you peace of mind. 

Improve the Climate Control of Your Home

Heating and cooling the home can be a huge expense for a homeowner. Installing interior waterproofing in your home can help to alleviate that expense. Interior waterproofing will help to reduce the humidity level of the air inside your house. So, your HVAC system will not have to work as hard to heat and cool your home. 

Increase Your Living Space 

Installing interior waterproofing can instantly increase your living space. It can help you turn an unfinished and unusable basement into an extra bedroom or living space. Another option is to create a bonus room for your kids or guests. Having a waterproofing system in your basement opens up many possibilities because you won’t have to worry about water seeping in. So, you can furnish your basement with whatever you like and use the space however you see fit. 

Increase Your Resale Value 

Most homeowners are concerned with the resale value of the home. At some point, the house will be sold, and it’s in a homeowner’s best interest to get top dollar for it. Solving a water issue in your basement will increase the attractiveness of your home and make it much easier to sell. As a buyer, not having to worry about a dry basement or hiring someone to fix it can be the deciding factor between buying your house or another one. 

Causes a Wet Interior Basement

When you wish to understand the importance of keeping your basement dry, it is vital to know what exactly causes moisture. Unfortunately, as homeowners, it is important to note that water has a knack for finding its way into every corner of your home. Because of the basements’ unique construction and nature, the given space is particularly prone to wetness.

Here are some of the primary causes of basement moisture:

Improper Slope:

The ground near the foundation of your home outside should slope away from your home. The slope should not decline towards the home’s foundation. When the slope is faulty, water accumulation occurs around the foundation of the house. It tends to damage the overall structure.

Improper Drainage & Soil Systems:

When the groundwater and rainwater cannot drain properly, they can make their way into the basement area of your house. Poor drainage systems and weak soil around your home’s foundation are some of the most common causes of wetness in the basement. When the water flow is not directed away from the house, it will accumulate around the foundation, through which it will flow into the basement’s cold joints, porous walls, floor, and cracks.

Poorly Installed & Maintained Gutters:

Gutters are assembled to direct rainwater away from the foundation of the house. When the gutters are installed improperly or get clogged due to poor maintenance, water will drain towards the home’s foundation – rather than away from the foundation.


Basements are known to be notoriously wet places. In case condensation occurs in your basement, it can lead to the formation of moulds, mildew and cause potential damage to an organic surface. Especially sheetrock and wood.

Cracks in the Basement:

Cracks present on basement floors, walls, ceilings, and around the doors & windows tend to provide the perfect way through which water could flow into the basement area from the outside. Water always finds the most accessible paths through the least resistant areas, and cracks in the basement serve to be the most natural path for water to get inside.

Hydrostatic Pressure:

Hydrostatic pressure occurs when water accumulates around the foundation of your house. As gravity tends to push down the water, it tries to escape by releasing pressure. As such, the water forces its way into cracks on basement walls and floor or the area where the wall and floor meet. Due to the build-up of intense pressure, foundation cracks can form on basement walls and floors.

In reality, interior basement waterproofing should be considered more of a water management approach because it addresses water already leaking into the house.

Installing a backwater valve is one of the most effective measures to save your basement from flooding if your home is on a slope or in a flood-prone area. Installing a backwater valve prevents sewer water from entering the basement through the toilet or sink in the event of a major downpour. The consequences of sewage flooding in the basement are unpleasant, and water damage restoration is quite expensive.

Installing a drainage system is the most complex solution for interior waterproofing. Several approaches and materials can be used. Some solutions are a French drain with a sump pump installation, rubber walls, water weeping tiles, and a drainage membrane. That system allows water to escape without damaging the walls effortlessly.

Annual maintenance is needed for your sump pump system. A sump pump must be inspected regularly because if not, it could fail when you need it most.

Improve your interior basement drainage system with the installation of waterproofing plastic sheets and panels on the walls. They allow walls to stay dry even in a serious leak and facilitate flow to the drainage system. This measure is more expensive but saves the interior without any visual damage.

Below-grade windows sealing should be considered when interior waterproofing as many basement leaks are caused by improper window installation. Planning for a new look for your house? Look no further!  MJS Construction Group  is here to help in your townhouse builders.

Drain cleaning and replacement can be hard to do by yourself, but if you see a clog or smell mildew – it’s time to call the professional.

Most Common Ways to Waterproof a Basement

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Are you looking for productive ways to waterproof the basement area in your home? Need to know how interior basement waterproofing works? Now that you have an in-depth idea of the common causes of wetness in the basement, it is essential to know how interior basement waterproofing works to keep the area dry.

Interior Waterproofing

Do-It-Yourself’ers use quick, simple interior basement waterproofing methods when the first sign of a water leak or crack is visible. A temporary solution for interior waterproofing might include using coatings and sealants, along with a dehumidifier for preventing condensation in the basement area.

Other usual considerations for interior basement waterproofing are easy and the most cost-effective ones for homeowners. Existing cracks or holes in the floors, walls, or ceilings of the basement are sealed and appropriately made watertight. Special sealants, such as hydraulic cement, can be utilised to make cracks or holes waterproof.

Exterior Waterproofing

While it is essential to make the interior of your basement waterproof, exterior waterproofing is equally crucial. When dealing with wet basements, most of the problems usually arise from the outside environment. Therefore, it is necessary to look at the outside portion of the basement and exterior waterproofing.

Exterior waterproofing requires expensive and complicated procedures in comparison to interior basement waterproofing. This approach requires a unique skill set of labourers to help get useful results. Hiring a contractor with less experience to save some money might cost you bundles of money in the long run.

Exterior basement waterproofing involves excavating the soil that surrounds the foundation of your house. It turns out to be quite a labour-intensive procedure that might require large tools & machinery. Once the soil around your home’s foundation has been properly excavated, a high-quality waterproof sealant is applied to the exterior walls of your basement. The sealant is usually some polymer-based material that is meant to last for 25 years. 

In reality, you would be lucky if exterior waterproofing continues to be effective after five years.

The loose backfill soil surrounding your home’s foundation will move up and down, side to side, as the hydrostatic pressure changes during every rainstorm tearing through the waterproofing layers applied during construction. 

The breached waterproofing material will be the result of the hydrostatic movement of soil and underground stones. In ideal cases, the process of exterior waterproofing should occur during the original construction of the house. Quickly constructed homes lack adequate protection to fight back groundwater. Finding the right duplex build  is an important decision. Check out our range of the best home design constructions at Hitch Property Constructions.

DIY waterproofing vs. hiring a professional

Benefits of DIY waterproofing:

  • It will be cheaper since you only pay for materials, but that does not account for the amount of time it takes.
  • You don’t have to worry about strangers coming into your house and can work at your own pace.
  • Some minor waterproofing can be done by the homeowner, such as sealing the windows, cleaning and testing the sump pump, and controlling humidity in the home.

Cons of DIY waterproofing:

  • You can seal the crack in the wall or the foundation with products available at any home improvement store, but it will only be a temporary solution. Most cracks happen because of water pressure from the outside, which needs to be addressed.
  • City Wide Group will provide you with a lifetime warranty for the waterproofing done on your home.
  • Installing a drainage system should only be done by professionals because it involves the use of heavy machinery. If done incorrectly, it can cause serious structural damage to your home.
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