Iowa Code § 658.7: Purchaser at execution sale.

The purchaser of lands or tenements at execution sale may have and maintain an action against any person for either of the causes above mentioned, occurring or existing after such purchase; but this provision shall not be construed to forbid the person occupying the lands in the meantime from using them in the ordinary course of husbandry, or taking timber with which to make suitable repairs thereon, unless the timber so taken shall be of higher grade than required, in which case the person shall be held guilty of waste and liable accordingly.