Skip to main content
Saturday, November 14, 2026Nov 14

This little-known ‘dark roof’ lobby may be making your city hotter

White roofs are not uncommon on commercial buildings in Phoenix, Ariz., the hottest major city in the United States. The city, seen April 26, 2025, requires new commercial buildings and some new residential buildings to install cool roofs that reflect the sun. (Dee J. Hall/Floodlight)
White roofs are not uncommon on commercial buildings in Phoenix, Ariz., the hottest major city in the United States. The city, seen April 26, 2025, requires new commercial buildings and some new residential buildings to install cool roofs that reflect the sun. (Dee J. Hall/Floodlight)

This story was originally published by Floodlight.

It began with a lobbyist’s pitch.

Tennessee Rep. Rusty Grills says a lobbyist proposed a simple idea: repeal the state’s requirement for reflective roofs on many commercial buildings.

In late March, Grills and his fellow lawmakers voted to eliminate the rule, scrapping a measure meant to save energy, lower temperatures and protect Tennesseans from extreme heat.

It was another win for a well-organized lobbying campaign led by manufacturers of dark roofing materials.