· urbanite (broken up concrete)
Insulation is a building material. It begins with the letter i.
Granite
· urbanite (broken up concrete)
Insulation is a building material that starts with I.
Some building materials that start with B are bricks and boards.
granite.hard material
Urbanite is broken up concrete used as a building material.
Some building materials that start with the letter T are tiles, travertine, and tar.
Granite.
granite
gypsum
GRASS