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Our Services

As one of the only window and door wholesalers in the St. Louis area that has full-time service professionals on staff, our team at XL Building Products is here to provide you with the product knowledge and assistance you need. Whether you need specification requirements or application and repair information, we take the time to deliver quality customer service backed by our industry experience, professional training and local resources.


Our skilled professionals support you throughout the entire specification and selection process. We offer on-site measuring assistance and consulting to help determine your specific needs based on architectural design, style preferences and price point. Tell us about your project and the features most important to you and we will work with you to ensure the perfect product is chosen for your project. As ordered, your windows and doors will arrive to specs within the scheduled timeframe.


Not only do we provide a variety of products, but we partner with qualified local builders so we can refer recommended contractors for professional installation. Whether you’re building a brand new home in St. Charles or replacing windows in a 100-year-old home, our network of preferred contractors can install windows and doors for virtually any scenario.


For your convenience, XL Building Products refers preferred local contractors for window and door repairs. Not only does our local network of builders and contractors provide smooth installation and repair services, but it enables us to offer our customers further support services successfully, which assists in satisfying our customers even more.

Let us quote your next job. We’ll provide you with a quality, value-based bid, free delivery with purchase minimums, contractor referrals and service before, during and after your sale. Contact XL Building Products to schedule your evaluation today.

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