れんが煉瓦rengaレンガrenga
1.

A construction material made from clay mixed with sand and other additives, shaped into a rectangular form, and then fired in a kiln, commonly used in walls, pavements, and other structures.

2.

A hardened clay product, typically reddish-brown in color, that is often used in building and construction for its durability and structural properties.

Example:

あの家はレンガ造りだ。