It is common for home owners who replace windows to suddenly start having condensation. This is because they now have windows that are airtight and that makes it difficult for excess humidity to escape through the cracks. Condensation on your new windows indicates that you have excess moisture in your home.
Moreover, wood, plaster, cement and other new building materials used in remodeling and new construction release a significant amount of moisture. When the heating season begins, there may be a certain amount of temporary condensation that appears. Sharp, quick drops in temperature can also create temporary condensation problems during the heating season.