3. Floor maintenance and carpet renewal

Install residential carpet.

Place the needle punch on the board.

Cut the board according to the shape of the floor and set on it.

Apply rust inhibitor. The rust turns white.

Cover the vent hole with an aluminum plate.

Remove all and clean.

When the carpet was peeled away, a thin, crumbling plywood board was revealed.

Remove existing cabinet. It seems that the two square holes visible in the back were for discharging gas to the outside in the event of a gas leak.