Energy Efficiency Upgrade – How to Seal Up a Basement Window July 27, 2011 ryw Energy Efficiency, Energy Efficient Products & Technologies, Step By Step Difficulty: 1 of 5 Basement windows are often a source of heat loss in a home. Follow the steps in this video to address the issue in your home. Materials: Related Posts How to Clear a Blocked Sink Drain Clearing a blocked sink drain requires only few basic tools and a little elbow grease. How to Install a Dimmer A dimmer can be an energy-efficient alternative to a regular light switch. How to Repoint Bricks in a Wall It takes only a few tools and some mortar to make an old brick wall look like new.