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Waterproof foundation conduit penetration

The removal of the moisture in the most complete and expeditious manner will decrease the probability for intrusion of water. Wall expansion joints should be designed to accommodate the anticipated structural movement. The lens membrane should slope away from the building and collect and redirect the runoff to a drain tile or sump away from the foundation. Where grade slopes down along an exterior wall, the waterproofing will step down incrementally so that it continues to protect the below grade, occupied space. Structural Support, Environmental Control, Finish and Distribution, are expanded below in general terms for foundation walls. Debbie Niedermuller, Halton Hills.
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Foundation Walls

Waterproof foundation conduit penetration
Waterproof foundation conduit penetration
Waterproof foundation conduit penetration
Waterproof foundation conduit penetration
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water proofing inside PVC conduits

Debbie Niedermuller, Halton Hills. Common knowledge suggests that the seals serve as a back-up function and that avoiding moisture build-up is the principle objective for obtaining a leak free building at penetrations. Although the composite board may have a polyethylene sheet on the membrane-side, this sheet is often cut, damaged, or missing. Fluid-Applied Systems—These systems include urethanes, rubbers, plastics and modified asphalts. Conduits are areasy installed and the slope was not considered.
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Utility Line and Pipe Penetration Leak Repairs

In areas with greater moisture loads from hydrostatic pressure from high water tables or sensitive interior environments, a waterproofing membrane should be applied to the exterior surface of the foundation wall in lieu of dampproofing. This is accomplished through a drainage system at the exterior of the wall that is typically a free draining granular material. The integration of the two systems requires careful consideration to insure that all moisture, air and thermal criteria for each system are satisfied at the transition interface. For treatment of leaks providing amplified external drainage media similar to that required on the exterior wall is highly effective. Distribution Functions —Foundation walls may contain distribution systems such as electrical and electronic runs.
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PVC and polyethylene pipes are available in smooth or corrugated configurations and are slotted on the bottom half of their cross-section to allow water infiltration. Moisture that penetrates through the upper screen needs to be directed to the exit drain located at the base of the foundation wall. Since dampproofing cannot withstand hydrostatic pressures, it should not be used on structural elements below the water table where the intent is to prevent interior water leakage. In combination with bentonite sheet waterproofing, these voids can be detrimental, since the bentonite can swell into the voids and loose its waterproofing integrity. Blind-side systems are typically either a waterproofing sheet or an impermeable clay-based material. Not a lot, but not insignificant.

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