Is silicone-impregnated ripstop nylon waterproof?.
Silicone impregnated ripstop nylon is waterproof within “normal operating conditions.” In very heavy rain and high velocity wind-driven rain some extremely light interior misting is normal and equivalent to increased interior humidity. Q: How should I pitch my Tarptent in a storm? A: Tarptents should be pitched foot-first into the wind and rain. Tarptents have excellent rear protection and can be operated even without the front beak if the rain is coming from the rear or directly overhead. In side-driven rain, restake the front corner(s) as needed to lower the sidewall(s) and prevent side spray. There are also side pullouts halfway along each long side to help with side wind and rain. Put just enough tension on the sidewall to prevent it from caving in but avoid pulling the ridgeline down. In front-driven rain, deploy the front beak and move a foot or so back from the netting door. If possible, take advantage of natural windbreaks to limit front-driven rain.
