I tried doing a search on my question and nothing came up so I wanted to ask a few of you more experienced growers.The room I'm planning on growing in is a bedroom and I'm planning on taking off the wooden door and replacing it with diamond mylar so i can cut a hole in the bottom right hand side of it for an intake fan,I was curious as to what is the best way to make the mylar as airtight as possible(minus the hole for the intake fan of course) please keep in mind I'm renting this trailer and I have very few options when it comes to "attaching" or "screwing" things into walls and making holes as the lease office doesn't like it.Thanks for any input.

duct tape

They make an aluminum tape for duct work.

yes but the problem is I'm going to need to walk into that same door on a regular basis,won't that take the paint off the door trim?and also from what I'm to understand isn't diamond mylar fairly easy to rip?

You can buy a door system with a zipper in them. Check your hydro shop. If you have the door off already why not carefully remove the trim on the inside tape where the trim was and whala once the trim goes back on, no one is the wiser.

Metal tape and Tuck tape work the best IMO. They both will cause damage upon removal.

That's a really good idea!I never thought to remove the trim completely,if those two kinds of tapes do remove paint why not make it in the surface area already covered by the trim.*Brilliant*

How much are the zipper door systems?

A zipper with sticky strips on both sides is about 15$ I made a zipper door for my room and it worked great until the zipper broke.(prepare for yours to break aswell if you enter the room alot). Easy enough to replace though.

Use my door method, for it is the greatest!

-I used-
4mil black/white poly
Waffers
Tuck tape
R20 insulation
staples,screws,or roofing nails.


-cut 2 pieces to a size that would overlap past the door
-Lay both pieces over each other, and tape them together around all sides.
-Lay out the zipper in the middle of the poly, mark the height at the top and bottom.
-Cut a slit down the middle from mark to mark.
-Tuck tape both new edges(halfway for now) so they are sealed aswell
-Take insulation you've skinnied out so that its about r5. I used an r20 piece of insulation, stripped it into 4 skinny pieces and used that.
-Stuff your door on either side nicely.
-You need 'waffers' to hold the insulation up, so it doesn't sag over time. I cut up 8 small pieces of drywall 2"x2" and used 4 drywall screws to fasten each set together on either side of the poly.
-Finish taping off the middle poly when you've stuffed it.
-Add the zipper
-Tuck tape either side of the zippers adhesive strip(for added support and seal)
-use tuck tape and staples to hold it on the wall.

hang that whore and you're done! there you have it, 1 insulated 4mil poly door.

Lets hope that made sense, I'll go get a picture. Hurray for visual aids!

pics were great,explained quite a bit of what you were talking about! how do i +rep? the only question i have left is specifically about the waffers? where do i put them?

Glad I could help!

The waffers are to keep the insulation standing, add a waffer about 3" down from the top of each piece of insulation, that should keep them up right and the insulation shouldn't fall to the ground over time.

In the middle picture, you can see 8 pieces of tuck tape in the center sorta, That is where my waffers are placed.

oh yeah! also wanted to ask how thick is r5 compare to r20?