Excavation and Sealing Process
Case Study: Excavation and Sealing Process
When foundation walls develop cracks or holes, two major things happen. First, water enters your home leading to mold, mildew, and thousands of dollars in potential water damage. Second, the wall will begin to deteriorate, eventually causing structural complications and issues.
An interior Pressure Relief System, although helpful, is not the solution. While it would catch the water once it enters and channel it to a sump pump (discharging the water), it will not stop the water from continuing to re-enter your home.
The preferred solution is to excavate and seal the area around the holes to stop water intrusion all together. The process can be quite invasive but the results are positive and long term. If there are any plants, bushes, or shrubs, etc. in the area, they would be removed prior to beginning work. The areas immediately adjacent to the wall or walls are excavated to the bottom of the footer. The wall is then cleaned, dried and the holes, patched. The first coat of sealant is applied and allowed to set up overnight. A second coat of sealant is then applied and covered with a layer of polyethylene. The wall is then carefully backfilled using a light compactive effort.
The concerns are that in addition to plantings, most homes have concrete/brick sidewalks, driveways, decks, etc. which all present an additional cost to remove and/or replace. Settlement will occur down the road, so the homeowner will be responsible for furnishing and placing additional fill material. The result is a dry basement that has been sealed to prevent any future water intrusion or deterioration of the foundation wall. All things considered, this is a good method to seal an exterior wall leak.
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