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Process of Basement Waterproofing in Toronto and GTA
Waterproofing Toronto homes we offer a thorough, permanent and cost effective solutions
This video helps to visually explain the external basement waterproofing process we follow at Aquamaster Drain Plumbing & Waterproofing Inc.
Assuming that there is adequate space directly around the house, we strongly recommend the external waterproofing process, though there will be cases where external waterproofing is not required.
The following is the process we follow when conducting external waterproofing:
Safety and Preparation:
The first step in external waterproofing is to locate gas lines and hydro wires, as they can be very hazardous if punctured. The job area must always be protected with plastic tarps and plywood. Any plants in the area are moved to plastic containers with topsoil and treated with care during this process.
Once the preparation is completed we can move onto excavating the area and beginning the work. Any asphalt within 2.5 feet from the wall needs to be cut and demolished in order to access key areas. The area will be excavated to 4 inches below the top of the footing, since the new weeping tiles will need the space during the sealing process.
Cleaning and Drying Area:
The foundation walls are then powerwashed to remove dirt, debris and other buildup. If the foundation is a block foundation then the water will need to be drained prior to drying the foundation wall. The foundation wall is then dried using a heat source (usually a propane torch). Without this step, it would be impossible to locate all potential defects, not to mention that the foundation sealant would not adhere properly if the area is not clean and dry.
Any cracks on the wall will need to be fixed using hydraulic cement, or parge the entire wall if the foundation is a block foundation. Once cracks are sealed, we apply the first coat of Aqua-Bloc (which is a rubberized asphalt membrane), which remains pliable, allowing it to stretch even if new cracks appear. We then install a yellow jacket (which is a mesh), followed by another coat of Aqua-Bloc. A Delta DS membrane is then installed, using galvanized anchor nails for the plastic molding that goes on top of the membrane.
Installing New Footing Tile:
Once the sealing is completed, we then install a 4" perforated weeping tile, along with a cloth filter and connect the new weeping tile to the existing weeping tile. We may also install a sump-pump inside of the basement to connect the weeping tile there if the situation demands it. We make sure to perform a drain camera inspection before connecting to make sure it's nice and clean.
At this point, we cover the weeping tile with 3/4 gravel 10" on top and install the filter between gravel and soil. We then backfill the area with gravel towards the side of the house and the excavated soil, finishing with a layer 3/4 gravel and/or topsoil.
Once this process is completed, we make sure to clear up the job area and dispose of any leftover materials.
In some instances, only internal basement waterproofing may be required, such as if the water is coming up through the basement floor.
Internal waterproofing is usually performed if the space outside is limited, or if excavation outside could cause damage to the property. We also follow the process of protecting the job area with plastic tarps. We then break the concrete floor and dig a trench along the foundation wall that is approximately 1 inch wide. A DELTA MS membrane is installed on the foundation wall, followed by a 4" perforated weeping tile with filter, connecting it to the existing storm line (if there is one). This may be substituted with installing a sump pump and connecting the weeping tile to the sump pump, discharging it outside. The weeping tile is then covered with 3/4 gravel, followed by filling with new concrete. This would conclude the process and again the area would be cleaned, with leftover material disposed.
Remember to ask the experts if you're in the Toronto or Mississauga area and have a question regarding your basement waterproofing.
We're always happy to help you find the best solution.
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