For growers with that DIY spirit, there is no need to fret over all of the prefabricated tents we sell. HTG Supply hasn’t forgot about you, and our selection of DIY Tent & Grow Room Materials prove it! Get yourself some reflective mylar for your walls, some panda film for your floors, …and a tarp zipper for your door! Our mylar and poly is non-gassing, so there is absolutely no need to worry about and harmful emission from the application of UV light. Build the grow room your plants deserve your way. Shop now for DIY Tent & Grow Room Materials.