Tying the new roof to the current one is a complex process. It will cause different problems if you don’t remember the below points, *Water damage will happen to the construction of your home if you don’t tie the additional roof to the current roof. *Don’t damage your new or old structure by putting excess weight on the additional roof. In this case, take assistance from an engineer to know the permissible weight of the additional roof. *Serious injury can happen at any time when installing a new roof. Take necessary precautions to confirm a safer working environment.