In order to address the crack from the exterior, a hole is excavated down to the footer and the wall is cleaned of all loose dirt and other contaminates.
A “Bento-Seal” paste is applied over the crack form the top of footer up to within 6″ of finish grade. (“Bento seal” is a combination of sodium bento nite and butyl rubber in a paste form.)
The upper portion of the void as well as any of that above grade is coated with a one part urethane. The reason for this is that the seasonal changes in temperature as well as the sun’s ultra-violet rays will have an adverse effect on the bento seal. It has also been shown to have the same negative effects on most all asphalt based sealants.
A layer of heavy duty visqeen is embedded into the seal.
A small amount of “Bento-nite” powder is dumped into the base of the hole.
A 3 sided form is created using a “Bento-board” and then this form backfilled around using the existing soil.
“Bento-nite” boarding is a water soluble card board with “Bento-nite” power filling in the corrugations.
An addition measure of “Bento-nite” powder is fill inside the form up to within 6″ of finish grade. The remaining portion of the excavation is capped off with the existing soil leaving a small mound to allow for settling. All excess spoil is removed and disposed of properly.
In the situations where concrete or asphalt was removed it will be replaced after the area as been allowed enough time to settle properly.
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