My patio roof has about a 7 degree slope (1.5:12) and was previously covered with corrugated polycarbonate panels. They had become quite brittle and cracked in several places and were mildew stained so I took them off and have cleaned and painted the underlying structure. Now I'm trying to decide on new roofing material and struggling to identify any options...
I had first though about just putting up plywood and shingles but the slope seems too low for that. Membrane roofing would work, but it's not the most attractive option a for backyard patio. There are some metal roof panel options I can find at the box stores, but none are rated for a slope this low, I'm guessing because of the exposed fasteners. Metal options that can handle a slope this low do not seem to be readily available at the consumer level.
At this point the only thing I can really find that is suitable are twinwall polycarbonate panels which will work, but I'm skeptical of how long they will hold up.
Are there any options I'm missing? I've tried calling roofers to see about a proper standing seam metal roof but none of them are interested in a job this small.