This has been an on/off winter, warm one day - freezing temperatures the next. When water falls and then freezes continuously eventually it gets in to existing cracks in the basement foundation .It  then freezes and expands causing a separation in the wall of the foundation allowing water to seep in and cause basement leaks and damage. Another culprit is those weeping tiles getting old and plugged with sand and dirt . .Once that happens their is no where for the excess water to go except into your basement causing more headaches and damage to your residential home. Let us fix your leaking basement for good by using our basement waterproofing procedure.  905-823-4663.

How and Why Does My Basement Leak?
In order to understand what options exist for solving a water problem in your Mississauga basement, you must first be familiar with some basic facts about foundation construction and the dynamics of water pressure. The illustrations in Figure 1 and Figure 2 depict side views of two different below-grade (below ground level) walls. I have selected a hollow  cinder block wall and a solid poured concrete wall to illustrate the various elements making up the stages of basement seepage. Familiarize yourself with these drawings, as they will become the keystone in comprehending why your basement leaks and what to do about it.

Water is heavy!

Have you ever carried two five-gallon buckets filled with water? Well, guess what? Water is definitely heavy. During a soaking rainstorm or a rainstorm causing a snow melt, thousands of pounds of water pressure are exerted against your basement walls and floor. This unfortunate situation is compounded because many Mississauga homes are built on deposits of hard pan clay, which do not allow for speedy water percolation into the deeper sub soils. The result is that huge amounts of water pressure build up around your home. The question is, can your home resist the water's onslaught?

Most builders in the Toronto area offer only a one-year warranty against seepage (basement) on new homes. And when an existing home is sold, most states require a one-year dry basement warranty. This shows that the various watch dog consumer agencies are well aware that basement seepage problems exist, on a huge scale. Unfortunately, building techniques reflect the fact that homebuilders are not required to furnish a more comprehensive guarantee than the standard one year.

Hydrostatic Pressure = Leaks

In order to gain a greater overview of a complex problem, let's look at how the average Mississauga basement gets built. First of all, the contractor digs a hole in which to place the basement. Often times this excavation takes place in dense, heavy clay typical of many areas in the Ontario  throughout the southern Ontario. If it rains copiously during the excavation period and before the basement is built, one can see large amounts of water standing in the excavation hole because the rainwater cannot percolate downwards through the dense clay. If the excavation takes place in an area where springs are active, water can be observed gently running into the excavation site from the sides of the hole continuously, even in the absence of rainfall. Basements or crawlspaces are placed anywhere from 3 feet to 14 feet deep in the earth and the depths of excavations vary according to the architect's design. One thing is for sure, if the soil type traps and holds water for longer than 48 hours, then the basement built there is in jeopardy of leaking unless properly waterproofed and drained. But, we'll get to that later.

After the space for the basement is fully excavated and is large enough to accommodate the basement as well as an additional six to seven feet working space beyond where the walls will stand, the footing is poured. The footing is the continuous ribbon of concrete on which the foundation walls will be placed. The structural integrity of this footing is extremely important since tons of foundation walls, plus the superstructure of the house will be permanently resting on it. If shortcuts are taken or if the footing is somehow 'sub-code, then the chances that the basement will leak rise dramatically.

Once the footing is in and cures, the walls are begun. In modern times, the typical construction materials used for basement walls are cinder blocks, cement blocks or poured concrete. Sometimes they are combined on a single foundation. Figures 1 and 2 show both a hollow wall and a solid wall and a solid wall. Cinder or cement blocks are laid one upon the other in a staggered and interlocking fashion, thereby creating a hollow, two-sided wall. The poured concrete wall is solid. The techniques used to solve water seepage problems affecting these two types of walls are quite different. Can you see some obvious differences with how the water enters the two wall types? Hold those thoughts. They will be pertinent later.

After the walls are laid up, as in the case of cinder blocks, or poured into forms as with poured concrete, and they cure (or strengthen as the concrete becomes harder day by day), they are ready for the conventional waterproofing techniques of today.

 Freezing/Thawing Mississauga
When soil is frozen it expands and then contracts again as it thaws. As this is repeated over the years, the expanding and contracting soil will often shift the concrete slab slightly. This will eventually place pressure on the slab. When the pressure becomes too great, the concrete will crack and split. This process will be more rapid in areas with dramatic shifts in temperature, like Mississauga and Oakville.

In basement waterproofing or cellar damp-proofing the ingress of water, often laden with salts can cause major problems.  By stopping the water from moving through the walls and floors you prevent the passage of salts which in turn stops the expansive salt damage which you often see at the surface as efflorescence or white dusty powder.

For waterproofing your Mississauga cellar or any area below ground from the inside, we use the waterproofing system which is the fastest and easiest to use system on the market – a slurry applied tanking system which is not only very cost effective but also time proven since 1955 as the safest and most secure system.  Compatible render, plaster and anti-mould paint based on nano-silver complete the system approach to basement waterproofing or tanking.  We can supply product or an installation crew to do the work for you. Just ask us for a quote in Mississauga.

External waterproofing in Mississauga Ontariio, for example on new build projects or where the outside is excavated allows you to waterproof using the range of high quality brush/trowel-on or spray-on bitumen emulsions which from an impenetrable skin on the outside of the building. Easy to use, fully BBA certified and guaranteed to give life-long waterproofing to your basement.

Damp-proofing works, where you want to inject a new DPC or damp course to your walls to stop rising damp are easily addressed using Injection Cream – the original and best way to create a dry zone in your brickwork.  Simply drill a series of holes and inject the cream consistency product into the wall. It is that easy!

Damp patches to walls can usually be controlled using our unique facade cream – simply brush on the cream, allow it to soak in and your brick work is waterproof against damp and driving rain in an instant.

 Basement waterproofing cost and estimates on waterproofing sytems in Ontario. Mississauga Oakville Burlington Toronto Etobicoke GTA Milton areas.

With cinder or cement blocks, the builder parges on one coat of sandmix cement (1 part Portland cement and 2-˝ parts builder's sand), sometimes two coats are used depending upon local codes. This coat of sandmix cement covers the entire surface of the wall, from the footing up to the ground level (grade level). Poured concrete doesn't require parging. By itself, this coating would still allow water to penetrate the wall by means of a natural action called capillarity. This is a large word simply meaning “wick action.” Poured concrete and concrete products such as cement and cinder block cannot resist water penetration on their own. They are porous and absorb water like a sponge. Walls standing below grade are usually cementitious (made from cement products) and therefore require a waterproofing membrane placed over their exterior face in order to repel groundwater. This process of applying the waterproofing membrane is generally the weak link in the chain of construction steps that leads to so many water problems later in the life of the house.

The Membrane
Typically, the builder will spray or brush a very thin coat of liquid tar (and I mean thin, like the coat of paint on your car) on the walls once the cement coating has cured. The builder will then cover this thin asphalt membrane with a layer of plastic (6 mils) held onto the wall with a piece of furring strip tacked along the top of the wall at the grade level. Lamentably enough, this plastic, in my experience, goes on quite haphazardly. In many cases, as a result of construction mishaps, there are large rips and holes found in the plastic before the foundation is backfilled. This plastic should cover the surface of the below grade walls from bottom to top around the entire perimeter of the basement.


Before the (foundation) is backfilled, that is, before the dirt which came out of the excavation is bulldozed back around the house, filling in the area where the workmen stood, an inspection for rips in the plastic should take place. Unfortunately, this is not a common practice and even if it was, the next step in the construction process would negate such an inspection. What happens? Well, here's the rub—and it is a rub! Stones in the backfill soil are rubbing on and cutting the plastic, slashing through the paper thin tar membrane. That's right, these sharp-edged rocks (and any miscellaneous backfill material) are ripping the plastic and stripping areas of the wall of its tar membrane. This leaves the new wall beginning its life semi-defenseless against future water penetration. But that's not all!

As the bulldozer or backhoe pushes the excavated earth back around the newly built walls, something very important is happening—or not happening—depending upon your point of view. None of this soil is being tamped! Not one square foot is being compacted as it goes back. Obviously, the bulldozer or backhoe cannot maneuver into the backfill area until the soil has reached a close proximity to grade level, lest the heavy machine should tumble in.


 There are many causes of water seepage in existing homes, even in newly built basement foundation, principally the root causes are usually due to a combination of some or all of the following: poor foundation design and/or specification, defective materials, defective workmanship, deterioration of the substrate or structure, or a change in the external environment (e.g. rising groundwater or locally leaking sewers or water mains etc). Additionally adjacent construction works can frequently also affect the pattern of groundwater flow and surface water run-off. Therefore it is not surprising that a number of these factors can combine to cause leaks and related below ground waterproofing problems.


Basement waterproofing refers to techniques used to prevent water from entering the basement of a house or other building. Effective basement waterproofing will include both drainage and sealers. 

Basement Waterproofing is needed anytime a structure is built at ground level or below ground. Basement Waterproofing and drainage considerations are especially needed in cases where ground water is likely to build up in the soil and raise the water table. This higher water table causes hydrostatic pressure to be exerted underneath basement floors and against basement walls. Hydrostatic pressure forces water in through cracks in foundation walls, through openings caused by expansion and contraction of the footing-foundation wall joint and up through floor cracks. When Hydrostatic pressure occurs it can cause major structural damage to foundation walls and is likely to contribute to mold, decay and other moisture related problems.


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Whether you have a leaking basement, cracks in the foundation, or other settling and foundation problems, Homepros Basement Waterproofing has a professional  solution for your home. We have been Toronto Mississauga Etobicoke and GTA  basement waterproofing and foundation repair professionals for over 20 years. All of our basement waterproofing and foundation solutions are state of the art, using the best technology on the market. Our crews are clean and professional, guaranteeing a clean efficient job every time. Be sure to ask about our Lifetime Warranty Solutions to get the maximum protection you deserve for your home.

Call today to have one of our trained professionals diagnose your leaking basement foundation.

Basement foundation crack repair Toronto.

A home is most people’s largest investment; you deserve the best solution and service available.

Talk to our waterproofing professional about installing new weeping tiles for your drainage problems.

Underpinning basements for basement curbing support footings and weeping tile

Call Homepros waterproofing and foundation repair specialists at

905-823-4663 to schedule your foundation evaluation.

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What Problems are you Experiencing?
Leaking Cracks
Water on the Floor?
Cracks in the walls?
Doors and Windows Sticking?
Foundation Problems?

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Repair Contractors for leaking Basements in Toronto GTA Mississauga and surrounding areas    

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Repair Contractors for leaking Basements in Toronto GTA Mississauga and surrounding areas   

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2425 Truscott dr
Mississauga Ontario
Unit 67