First Klass Business Forms   Fabricating Debris The single most important glass issue facing window cleaners and building owners today.   Waiver for Construction Cleaning Protection for Window Cleaners dealing with tempered and heat treated glass.   Builder To Supplier Waiver All Builders and Construction managers should require this of their glass suppliers.   Shotgun Fungus Are there brown spots all over your building? Find out what they are and what to do about them right here.   Terms & Conditions Typical terms & Conditions First Klass employs on all jobs.