Retrofit

 transitive verb

1 : to furnish (as a computer, airplane, or building) with new or modified parts or equipment not available or considered necessary at the time of manufacture

2 : to install (new or modified parts or equipment) in something previously manufactured or constructed

 3 : to adapt to a new purpose or need

 

Many great organizations focus on greener building standards in new construction, but what about existing building.  Retrofitting your home can save you money, provide a safer and more comfortable environment, and conserve natural resources.  When deciding to go green, remember that it is often more sustainable to remodel an existing building than build a new one.  A new building would require more materials to build and the home you left behind would likely continue to waste energy, water, and resources for the rest of its useful life.