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 Interior De-Watering (Internal Breakout).
There are 5 main steps involved in our Internal De-Watering systems and they are as follows:
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 1. The floor is broken with jackhammers along the perimeter to expose the footing. If the foundation wall is constructed of concrete block, weep holes are drilled.
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 2. A drain pipe or drain track is installed depending on the footing configuration and soil type in order to provide drainage for the entire system. We have 4 different methods of drainage; Flat track for footings located close to the floor slab, Rectangular track for footings located far below the floor slab, 3" circular perforated PVC drain pipe for multi level basements (the circular pipe provides integration of non-perforated sections for transitions of elevation), and Cove base for monolithic footing/floor slab pours and for structurally reinforced slabs.
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 3. A drainage membrane or bond break is installed to provide a path for water to migrate down to the sub-slab drain pipe. We have many different options to perform this function including Dimpled sheet air-gap membranes, insulating reflective barriers, and cove mould. Systems are custom designed to suit each customer's individual needs and wants.
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 4. A sump pump is installed. Since all of the above systems create drainage, the water needs to drain somewhere! The sump pump works by providing a collection basin for the water from both the drain pipes and from under the floor. The sump pump becomes the heart and lungs of any internal system. There are numerous accessory systems that can be integrated into this sump pump system including window well drains, floor drains and exterior weeping tile drains to name a few. this versatility again, helps us to custom design a system that suits our customers needs and wants.
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5. Gravel is poured over the pipe and around the sump pump liner and concrete is re-poured.
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For most concrete block foundations, an interior de-watering system with it's inherant versatility, is the least intrusive, most effective way to deal with leakage.
Pros:
- System is not subject to silting like the exterior. Since any water passing through the block is "pre-filtered", filter fabrics are not necessary.
- Less expensive than exterior systems
- Exterior landscaping does not have to be destroyed
- Backfill remains undisturbed
- Fill does not need to "re-settle" prior to doing more landscaping
- Much less intrusive
- Structural integrity of concrete block is maintained by drilling weep holes that eliminate standing water inside the block
- No maintenance required
Cons:
- Some basement finishing's may need to be removed for work
- Not appropriate if concrete block is disintegrating or if exterior foundation repairs are necessary
- Repairs can be more obvious depending on type of system installed
Please contact us for more details »»
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