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French Drain as the Ultimate Interior Basement Waterproofing Solution

French Drain as the Ultimate Interior Basement Waterproofing Solution

Interior Basement Waterproofing

When the Certified Surveyor of Structural Waterproofing (CSSW) carried out a study on the habitability of over 5,600 homes in 2012, the findings were more startling than they expected. Over 73% of these homes had weaknesses in basements thus leading to moisture leakage and flooding during storms.

Similar findings had already been hinted at by the Property Care Association (PCA) and Concrete Foundations Association (CFA), among other industry bodies. As a homeowner, you need to appreciate the importance of effective interior basement waterproofing as a home improvement activity.

Dangers of Poor Waterproofing

The effects of poor basement or crawl space drainage can be devastating to say the least. They include flooding leading to property damage, high humidity levels leading to toxic mold growth, compromising the integrity of your home’s foundation and leading to loss of home value.

French Drain as a Godsend

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Most foundations cannot allow for exterior basements waterproofing if:

  • There is space restriction.
  • If a very large area of your basement is leaking, meaning exterior waterproofing cannot work.
  • If the problem is also caused by hydrostatic pressure rather than a leak, interior waterproofing is the way to go. This is because ground water under the slab rises and causes water to seep, meaning external solutions cannot apply.

This is where a French drain comes in handy as an interior basement waterproofing system. This system was first used in agriculture over a century ago, but today it is used extensively both in exterior and interior waterproofing.

What does this process entail? Here are some of the main aspects of this project:

  1. Breaking of the basement floor along the perimeter approximately 6 to 11 inches away from the foundation wall.
  2. The underside of the footing is also excavated to accommodate a perforated weeping tile. This PVC tile is used in order to allow both ground water and surface water to drain into it.
  3. The perforated pipe must be connected either to your home’s sump pump or another floor drain to ensure moisture collected is discharged away from the floor.
  4. The void excavated is then filled with gravel or clear gravel after a sheet of membrane is fixed to the interior exposed wall. This backfill is porous to allow water to go down the easiest route which is along the weeping tile.
  5. A layer of concrete is laid to complete the drainage system and protect your basement from flooding.

While there might be other interior basement waterproofing solutions, this is the ultimate choice for block, stone and concrete foundations. Just call your contractor and get an effective solution to your basement moisture issues today.