Are you looking for a sliding patio door screen, but are unsure which screen door is best for your needs?  RiteScreen’s Knock Down (K.D.) sliding patio door screens offer all the features and benefits to an assembled patio door screen, without worrying about damage due to transit. Your K.D. patio door comes with all the parts you need to assemble, simply follow our instructions for assembly of your patio door screen and watch our helpful DIY assembly videos and you’ll be on your way to loving the air you breathe!