Its vital to hire a professional company for your staircase installation or repair. Two of the main reasons is number one, quality installation and two quality materials. Unfortunately, there are many contractors who use cheap materials and have little experience. Stairs is a high end professional trade and considering the safety that is involved, it's best to do your homework on the companies that you are considering. Carpentry Plus You has over 26 years experience in professional finish carpentry including staircases.