Don't Wait Until The Damage is Done Basements that need exterior waterproofing are already in danger -- there's water forcing it's way inside even through the standard interior waterproofing job. That's serious stuff; the potential for hazardous mold is secondary to the potential that your home's entire foundation could split and crumble. When that happens, you're looking at a whole different level of expense. Contractors will have to come out, lift your entire home off of it's foundation, and repair the foundation in place under it. There's no amount of basement waterproofing that could match the kind of expense that will invoke, so it's much better to call the basement waterproofers while you still have a chance. https://local.google.com/place?id=8221478188544467675&use=posts&lpsid=2254780463246374368