If they are major repairs, such as a new roof or a boiler breakdown (capital items), you as the owner will be liable for the cost of repair. These will always be discussed with you beforehand.
For minor repairs we or the tenant bear the cost. In the unusual event a tenant causes damage to the property then we will cover the cost of repairing that.
As the investor and owner of the house you are responsible for any initial refurbishment cost in order to get the house to a 'rentable' standard.