David Fenske started as a warranty manager for a major contracting firm in Portland, Oregon. He observed that water infiltration from improper handling of vinyl windows created problems and consumer discontent. His solution was a repair method that would satisfy all parties, not deteriorate like existing window frame repairs and meet the certification standards of the manufacturer. David then patented his method. Window manufacturers noticed the improved customer satisfaction and started asking about his products. VinylDoc, the Vinyl Window Frame Specialists, was born. Because of his superior methods, both contractors and window manufacturers recommend the VinylDoc repair system. Soon after, Mr. Fenske started manufacturing his products for the repair industry and the window manufacturers. Now, after more than 25 years of quality products, window manufacturers have gained an appreciation of VinylDoc's cost effective solutions and products. Builders and window manufacturers alike consider VinylDoc a valuable partner in their success. Note that VinylDoc Repairs company is certified by VinylDoc Manufacturing. Information about the Repair company can be found at their website.