How do I Add a New Basement Window to a Masonry Foundation? Home » How To & Home Improvement » Home Renovation » How do I Add a New Basement Window to a Masonry Foundation? Posted on June 10th, 2013 By: Steve Maxwell Updated on November 22nd, 2015 Featured Video Steve offers advice about strengthening the area above a new basement window opening cut into a concrete foundation. TweetShareSharePin0 Shares