Quote Originally Posted by GrowRebel
Okay kids .... I put up the gift wrap mylar ... here is the picture, but it got all crinkled .... it doesn't have to be smooth does it? Don't know why it got crinkled .....

So what do you think?
Looks good! Crinkly doesn't matter too much down low, and up above looks good enough. Smoother is always better, but crinkly in mylar is like 85% refelction as opposed to 95%? something like that. Foil loses a LOT of reflectivity crinkled, but not mylar. I use & reuse silver gift wrap to line my grow areas.

"Space Blanket" is good, too. I couldn't find it - wrong time of year - but found the gift wrap easy enough.

As far as colours go, coloured mylar only reflects the portion of light that it's colour is. The rest gets lost. So less light. Think about it. Coloured mylar will work, but not as well as silver.

Another cheap - usually free - grow room liner is advertising posters. Like the big beer posters the liquor stores throw out every other week. Or movie posters the theaters throw out. Whatever. Not the front, the shiny white back! Almost as good as mylar, better than flat white paint.