Social Home Services: Roofers Edition

So, What Was My Plan? Most you know I service mostly Home Services businesses, and Roofers in particular.
SO…I’m always trying to find these things:1. A Great Foot-In-The-Door Service to Get New Clients2. A Great New Add-On Service for My Current Clients that Requires Almost NO WORK!3. Something to Sell to Any Roofer Whether or Not They Are My Client for Higher Paying Services!(And many times, they DO come back for other services after seeing this quality service)