Not cracks in the wall but the drug that contaminates the sheet rock and interior to an environmental cleanup or rehab being required.

That clean up if contaminated can be huge and take a lot of time and expense.

We are concerned about mold and contaminants so have asked tenants not to remain in the property until they are fixed up.

Phase I: An assessment and report prepared by a professional environmental consultant who reviews the property, both land and improvements, to ascertain the presence or potential presence of environmental hazards at the property, such as underground water contamination, PCB's, abandoned disposal of paints and other chemicals, asbestos, and a wide range of other potentially damaging materials.

One of the things to be certain you address is contamination of soil and water. 

I'd have to get it removed and checked for contamination prior to purchasing.

I would want them to have a remediation clause where they are on the hook for environmental cleanup costs if the site is found to be contaminated.

Someone said that the house has to be inspected by the state, because of the contaminants used in meth.

Unless you're in a very desirable area, meth contamination is going to stigmatize the property for a long time.

@Ernest GrindleAssuming it is contaminated, it wouldn't be mortgageable.