Allied. A business that forms a strong alliance with every customer and provides top-quality workmanship for all jobs, large or small. From our humble beginnings in 1975, Longmont CO to expanding to Denver CO and San Jose CA, we have seen tremendous growth. We are proud of the quality and integrity of our installers. Every interaction with an Allied associate is a positive one. Allied is licensed to handle larger roofing projects. To provide the best return for our clients' investment, we will search all materials according to individual job requirements.