Knight's Garage Doors offers 35 years experience in Commercial and Residential Repairs, Sales and Service on all types of Doors and Openers. No gimmicks, just low prices everyday. - Garage door repair, and replacements - We can tune up your garage doors - Replace springs, cables, and other parts - We will safety check your door and use quality parts. Veteran owned, and Family operated local business. Customer service is our number one priority. Serving all the Tri-cities - Blountville, Bristol, Kingsport, Johnson City, and surrounding areas