Do I use paint or Mylar

Paint it flat white and add mylar or better yet Orca film later if you want...This way, it's still highly reflective even if you change your mind on the mylar or whatever you use.

Orca is the very best though...just expensive.

So if there is a gap at all between the wall and the mylar it decreases the effectiveness of the film?

Originally Posted by dvs1038

So if there is a gap at all between the wall and the mylar it decreases the effectiveness of the film?

Correct. .

Some light will penetrate the mylar and then be partially absorbed by the wall and partially reflected back at the other side of the mylar where once again some will penetrate but the majority will just bounce back to the wall. This repeats over and over until it all turns into heat and is absorbed by the wall.

The larger the gap the longer the period between bounces which drastically effects the rate at which light degrades.


^Wall ^mylar

Well I think that depends on what thickness of mylar your talking about gastanker .. I agree with the 1ml the light penetrates it like you say , but if you use the 2ml, which is much stronger with no light penetration, you dont have to worry about a gap behind it and its easier to work with.

happy growin

Originally Posted by tellno1

Well I think that depends on what thickness of mylar your talking about gastanker .. I agree with the 1ml the light penetrates it like you say , but if you use the 2ml, which is much stronger with no light penetration, you dont have to worry about a gap behind it and its easier to work with.

happy growin

Like those emergency blankets at walk-mart.
GL on the grow

i painted flat white and put mylar over it

Wow I bet that pays off very well. I would love to see some pics.

just looks like mylar. i had flat white around, so i used it. then i added mylar as an afterthought. wasn't planned