I believe the top portion is water resistant, but the side is net, and slanted . the water can get in from the side in very windy rain storm. but if you cover it with a tarp as rainfly it shall be okay. I had 2 different type of screen house, and one with similiar design has one of joint and shockcore broke in rain storm. and now it is useless. the way it's design, because the joint change angle and direction of the support rod, the load of weight or stress are place on these joints area. the other screen house I does not have joints in the shockcore, and so the stress is distribute across the entire shockcore rod; but it's a bit too small... at 10'x10', it has trouble fitting the most picnic table in provincial park.
this is from Costco, I may give it a try and see how it goes,as costco has great customer support. family members want something that is easy to setup and big enough.