- L&I Services LLC is a family owned and operated small business in Longmont, Colorado. Although small, L&I treats no job as a small task. Providing high heat pressure washing, window cleaning, commercial office cleaning as well as residential services. L&I is a licensed, insured and bonded service company. So, you can rest easy and assured that the job will get done in a professional manner. Call for an estimate today, and welcome to the family!