Exterior Improvements

Exterior Waterproofing in Toronto


Stops water seepage and moisture in a basement eliminating musty odours and preventing allergies. Waterproofing the exterior foundation walls will preserve the structural integrity of your foundation and prevent the deterioration of your foundation walls.

Waterproofing reinforces the house's foundation and saves you thousands of dollars in expensive foundation repairs and rebuilds. Water can weaken the structural footing and settle in your residence, ruining priceless belongings and causing harm from moisture build-up. Basement moisture or water problems can reduce the value of your home and sell-ability. Many Realtors advise their clients to fix wet basements before putting their home up for sale. Your property value will increase immediately once it has been waterproofed.

Exterior Waterproofing Procedures:

Waterproofing your basement from the exterior is highly recommended because you are stopping the water for entering the basement through the foundation, and keeping it outside your foundation where it belongs. You are preserving the structural integrity of your foundation.

Exterior waterproofing and installing new weeping tile allows you to restore the foundation to its natural state and allows the greatest amount of drainage around your property. Exterior waterproofing is a system that requires excavation around the perimeter of the buildings foundation. The excavation depth depends on the elevation of your property. Most excavations range from 5 to 8 feet deep and approx. 2 1/2 ft wide. Foundations deeper than 8 feet will require additional shoring and stepping back the excavation to greater widths to prevent cave-ins. Once the hole has been excavated, shoring is installed to insure the safety of the crew and to prevent any soil from breaking free and caving in the area dug.

Excavation is to the bottom of the footing level where the old weeping tiles are removed and new continuous 4- inch weeping tiles with filter cloth are installed. Foundation walls are then cleaned and inspected for any voids or cracks, and the defective areas are chiselled out and repaired with a expandable hydraulic cement. Foundations are poured concrete, cement block, brick or stone/rubble. If the surface is too rough for a membrane to bond to, we apply cement parging.

We then apply a rubber bituthane primer which is the activator for the rubber bithuane membrane. The rubber membrane is applied in three foot wide sheets, with a min. 6" overlap. It will not dry up and crack, like a typical trowel-on membrane. The rubber membrane has enough flexibility to allow the product to expand and contract if any further settlement occurs in your foundation.

Next, we apply a dimpled sheet of drainage membrane (Delta MS) which is fastened to the top with a termination bar. This membrane creates a void between the rubber membrane and the soils to be backfilled. Once the waterproofing and membrane have been installed, a layer of 3/4 clear gravel is placed over the weeping tile to allow better drainage into the weeping tiles.

If your house has any windows installed below grade you will require a window well. A window well can be custom made from pressure treated wood or a pre-cast stainless steel well can be installed. A 4 inch vertical drain, weeping tile is installed to the footings. The window well is filled with 3/4 clear stone in allow water to drain directly into the weeping tile system. Then the area is backfilled with its native soil and compacted in 12" lifts to its original level. The soil is graded away from the property to allow water to run off.

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