This video illustrates the process of waterproofing Toronto basements.
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http://youtu.be/WSPxxIz0vmc

If you see moisture seeping into your basement, it is time to waterproof it with external waterproofing. This is important because a damp basement can lead to some serious structural damage weakening the foundation of your home. In some cases, a wet basement can also lead to plenty of health issues. This is why exterior basement waterproofing is an absolute must if you wish to protect your basement.

The process of waterproofing involves the removal of all concrete that surrounds the walls so that the important areas can be accessed. The exposed area then needs to be excavated right down to the footing and a few inches below the top of the footing. Once this is done, the process of waterproofing begins in earnest. The idea is to ensure your basement remains dry as a bone at all times.