There are many different insulation material options, but because of building codes set by the government all new construction tends to be lined with fiberglass and has been since the early 1970s.
Thin wood walls, spun glass and drywall
Fiberglass being installed in a building
The open faced side of the fiberglass inside of a wall before the drywall was put on.
Spun glass behind the walls around the electrical outlet and the wires.
Fiberglass lined around a doorway, ceiling and walls.
Fiberglass around the doorway and walls with wires running through it.
The paper side of the fiberglass behind the walls with the spun glass facing the outside of the room.
The drywall ready to put up to cover up the spun glass.
The room with the drywall ceiling covering up the fiberglass above it.
Ceiling lights being installed around the fiberglass
Extra fiberglass laying in the storage room next to the kid's bike. People rarely consider the air quality and how fiberglass effects it.
The open side of the spun glass before the drywall was put over it.