While you might be able to apply temporary sealant to obvious cracks, permanent chimney leak repair requires specialized knowledge and materials. Flashing installation needs to integrate properly with your roof system, and using the wrong materials or techniques often makes leaks worse. Chimney work also involves significant safety risks from working on steep roofs and handling heavy materials. Professional technicians have the right equipment, training, and insurance to do the job safely and correctly. Most importantly, we can identify all the sources of water intrusion, not just the obvious ones. DIY repairs often address symptoms while missing the root cause, leading to continued leaks and more expensive repairs down the road. Investing in professional repair from the start usually costs less than fixing failed DIY attempts.