Yes, in some cases it is possible to patch a roof instead of replacing it. Depending on the severity of the damage and type of roofing material, patching may be an option. If there are only minor issues such as small holes or cracks that can be easily fixed with sealant or tar, then a patch job may suffice. However, if the damage is more extensive and involves multiple areas of the roof, then replacement might be necessary for optimal protection from weather elements. Ultimately, it's best to consult a professional who can assess your specific situation and provide advice on whether repair or replacement is recommended.