Require Tenant to Maintain Elements of Space that Aren't Clearly Interior or Exterior

Your lease may make a tenant responsible for doing all interior maintenance work at its space, while you're responsible for doing all exterior maintenance work. Although you may think that distinguishing between the interior and exterior of the tenant's space is a snap, think again. Certain elements of a tenant's space can have both interior and exterior characteristics. For example, windows and automatic glass sliding doors at entrances and exits may face both the interior of a tenant's space and the outside of the space and the center's common areas.