All marking out is the responsibility of the client, together with the supply of water, power and adequate ventilation. All care will be taken during contracted work however any damage to services etc hidden in or under concrete will be the responsibility of the client. Additional costs will be incurred for excessive amounts of steel or any unforeseen circumstances. Terms of sale are full payment by the 20th of the following month for clients with credit account, or alternatively COD on completion of the work. All over due accounts will incur debt collection costs and interest charges of 20% per annum.