It is in your interest that certain items, which are important to you, be stated in writing in the contract. Scheduling Start and stop dates are difficult to pin down due to the unpredictability of the weather. But you can control exceptions. Be reasonable, but do make it clear that these terms will be enforced if necessary. This clause established a time period in which the homeowner can cancel the contract without penalty.
Some states require such a clause in contracts.
Check with your local authorities. Confirm that the Agreement states that all workmanship will conform to the requirements of the manufacturer s warranty and installation instructions. Especially take note that this includes ventilation requirements, fastener requirements, low slope installation terms and ice dam protection. All such terms are normally found on the shingle packaging, or will be found on manufacturer s literature available from suppliers. Contractor s workmanship warranty Make sure this is clearly noted in the contract.