SEATTLE -- When the new ramps open to connect to the SR-99 Downtown Tunnel, drivers won't be just driving on pavement. They'll be driving on foam. Giant blocks of foam - known as expanded polystyrene ...

SEATTLE -- Giant blocks of foam are being used in construction projects across the Puget Sound, and you might be driving over them everyday without even knowing it. The blocks recently caught the eye ...

There’s a 1,400-square-foot home on Juniper Place in Cortez that is being built with expanded polystyrene foam blocks. “It reminded me of a giant YETI cooler,” said Rachael Marchbanks, Cortez’s ...

(WKYT) — Large white blocks visible near construction on Interstate 64 in Shelby County are geofoam, a construction material made of expanded polystyrene. For today’s Good Question, Tom asks: What are ...