Plastic Sheets for Grow Room Seal

I just went out and bought some plastic sheet and masking tape, I wasn't sure if I should make an air tight seal around the plants in my closet and then cut a hole in it for a fan for ventilation or is that redundant? Right now the plants are just in my closet and there are flys around them and I was thinking maybe it would kill the flys. Let me know what you guys think because I'm not sure if I should bother sealing up the closet or not.

yea it definatly helps. u control the air circulation more. more pressure going in and out through the holes you made.... wont kill the flies though. u gotta clean the walls and floor and shit. kill the larvea.


yea. also you ever seen energy star dudes chaking someones house. they put a big exhaust fan that has a door shaped rubber sheild on it to make the doorway airtight? they use that and walk around with a handheld steamer and blow the steam near windows and cracks in walls to see if there is air leakage. like your grow u want it like your house seperate from the conditions on the outside. so u can control all the variables