Professional Contractor Support At Pella®, we’re dedicated to providing professional contractors with superior windows and doors for virtually any project. Discover more about the perks of working with Pella by visiting our Des Moines Showroom. Dedicated Representatives. Pella’s dedicated experts will offer assistance on estimates, on-site project management, walk-throughs and service after the sale. We will partner with you find the best solution for your client. Built To Order. All Pella products are built to order, and our delivery truck will arrive at the exact time you need it. Our products are packaged for protection and easy handling to make the installation as smooth as possible. Full Range of Products. As a Pella partner, you’ll be granted access to our full range of beautifully crafted products to meet and exceed all of your clients’ window and door needs. Pella Certified Contractor. The Pella Certified Contractor program offers training and support programs to strengthen your affiliation with Pella. Learn more about how you can participate in Des Moines Pella showroom's services to support professional contractors in your area.