now the space i have to work with is a 10x5 area..the first thing i do is precut some 5/8 plywood for the floor and lay it out..i then lay 2x4s along theperimeter and screw down to the ply..this will hold the flooring together and give me my base for the walls..after the base is complete i build my walls up(its a lot easier to do with 2 people).

after my enclosure is framed in i line the floor with 6mil plastic making sure to run it up the walls and staple to the studs making a pan.

i then wrap the inside with panda film white side out. starting at the top letting the exces roll out onto the floor.stapling along the top frame and studs .after all walls are wraped proced to saple the exces down to to the floor also...if your excess does not completly cover cover the floor cut another piece to do so..when you are finished you should be standing in a complete clean room enviroment...