All products are made to order based on your specific measurements and requests. When you order online, it can take 2-6 weeks before you get a call to schedule a delivery or arrange a pickup of your new windows. If you're replacing windows and order them during a home consultation, it can take 6-8 weeks to receive them. Installation usually takes one day but can take longer depending on the project. Lowe's has Pella windows in stock, so you can walk out with them that day if they have what you need.