1. I've never used cardboard for a roach but sometimes i will roll up a piece of computer paper.

2. Never tried it in a joint but with blunts people often put some tobacco in the end by the mouth part so they dont deal with roach's or dont have enough weed i guess.
BongZoola Reviewed by BongZoola on . Two Questions 1) Do you put a cardboard filter in your joints? 2) Do you roll them with a little tobacco As for my answers... 1) Yes 2) Sometimes Rating: 5