How to Waterproof Basement

Harmony Basements is one of the most trusted basement contractors in Toronto and the GTA. Among our many specialties are exterior and interior basement waterproofing solutions. Take a look below to learn about the signs of a wet basement, the types of basement waterproofing techniques, and how to waterproof basements.

Signs You Should Waterproof Your Basement

When you don’t have a waterproof basement, your home is more vulnerable to structural water damage, flooding, and mold or mildew development. It’s vital to recognize and address the signs of water infiltration as soon as possible. If left untreated, a wet basement can lead to costly repairs and create a hazardous living environment. Here are some of the signs of a leaky basement:

  • Musty odour
  • Wall, floor, and ceiling cracks
  • Water stains
  • Damp basement
  • Peeling or bubbling wallpaper or paint
  • Slimy, fuzzy, chalky, or wet walls
  • Discolouration on the floor, walls, or ceiling
  • Puddles of water
  • Leaking ceiling or windows

Before You Start Waterproofing

Prior to waterproofing your basement, there are a couple of steps you must take to maximize the effectiveness of the process and prevent safety hazards.

Follow these two steps before waterproofing:

The first step towards a waterproof basement is a simple inspection. Check the floors, walls, and ceiling for water, moisture, and mold. Before any repairs can be made, the space must be clean and dry. Waterproofing a wet or damp basement is dangerous and less effective.

You could get shocked while using power tools, slip and fall, and/or trap the existing moisture in your basement. If there’s mold or mildew, wash it away with an antifungal cleaning solution or diluted bleach. Efflorescence can be removed with a paint scrapper or wire brush. Always follow proper health and safety precautions by wearing goggles, gloves, and a mask.

Now that your basement is clean and dry, you can look for the source of the water infiltration. You may notice wall cracks, puddles with dripping water, or watermarks on the ceiling, walls, and/or floor. However, the source behind a leaky basement may not always be noticeable or clear. For example, humidity causes dampness, wet walls, and musty odours.

Water can also can seep through uncracked concrete. To identify the cause, tape a piece of aluminum foil to your basement wall. After 24 hours, if condensation appears on the outside of the foil, the problem is likely humidity. If condensation forms on the side of the foil facing the wall, water may be seeping through the walls.

Ways to Waterproof Your Basement

There are various ways to waterproof a basement. Each method comes with its own set of benefits and drawbacks to consider.

Learn more about how to waterproof a basement by reviewing the following:

Sealants and epoxy injections are useful for waterproofing basement walls from inside your home. They fill and seal any cracks or gaps in your walls that are allowing water and moisture to seep in. You can typically find and purchase standard acrylic sealants from your local hardware store. However, you cannot use these sealants of painted or finished walls, they can only be applied to concrete walls. Epoxy injections are more expensive than sealants and can be a DIY job or performed by a professional.

Benefits

  • Easy for DIY project
  • Inexpensive

Drawbacks

  • Ignores the underlying cause
  • Lifespan of epoxy injection is typically only 10 years

Interior drainage systems such as sump pumps and drain tile systems are a great way to waterproof basements. They reroute and collect water that enters your basement before pumping it out and away from your basement and property. Although interior drainage systems cost more than sealants and epoxy injections, it’s a less costly solution than exterior waterproofing.

Benefits

  • Doesn’t require excavation or extensive exterior alterations
  • Effectively collects and disposes of groundwater

Drawbacks

  • Allows water to enter the basement before removing it
  • More difficult to install and operate in a finished basement

Exterior foundation waterproofing diverts water away from your home before it can reach your basement walls or foundation. Two of the most common exterior waterproofing methods are French drains and exterior drain tiles. French drains are installed in trenches that are dug around your yard. Exterior drain tiles are combined with sump pumps which are installed around your foundation.

Benefits

  • Can provide up to 30 years of water protection
  • Stops water from entering your basement and seeping into your foundation

Drawbacks

  • Most expensive form of basement waterproofing
  • Disrupts the landscape around your home

Can You Waterproof Your Basement DIY?

Yes, you can attempt to perform minor wet basement repairs by yourself. These include small cracks and leaks, which can be fixed using sealants from a hardware store. While DIY jobs are often more affordable than professional waterproofing services, persistent or major repairs should be assessed and repaired by experienced contractors.

Water damage can lead to foundation and structural problems or flooding if not properly addressed or repaired. If you’re concerned a leak may be the result of a more serious underlying cause, contact Harmony Basements for expert advice, guidance, and waterproofing solutions.

Professional Leaky Basement Waterproofing Recommendations

Even the smallest leaks in your basement can be a sign of a larger problem. Professional leaking basement repairs ensure the source of the seepage and the leak itself are repaired properly. Identifying the reason behind the leakage is crucial to maintaining a safe and healthy living environment.

While applying a sealant or using an epoxy injection can quickly stop water from getting in, there could be further damage in the walls, ceiling, or floor that’s going unnoticed. It’s always best to consult experienced waterproofing contractors, such as those at Harmony Basements, in order to protect you, your family, and your house from harm.

Still Need Help with Basement Waterproofing?

Knowing the signs of a leaky basement, the steps to take before waterproofing, and how to waterproof basements is vital to protecting your house and family from the dangers of water infiltration. However, you may still have questions or concerns about how to move forward after discovering a wet basement.

Call Harmony Basements for a free no-obligation chat today to get the help you need to achieve a dry and healthy basement.

January 23rd, 2025 by Iurii