PC Awning Cheat-Sheet (2-Minute Read)

What it is: UV-coated polycarbonate sheet that blocks weather, not light.
Pick thickness: 2.7mm solid sheet door canopy, 2.7mm solid sheet patio, 2.7mm solid sheet heavy-snow zone.
Max span: 1 m → 2 m without posts; slope ≥ 15° so snow slides.
Yellowing? Only if UV layer is missing—demand 10-yr light-transmission warranty.
Noise: use 2.7mm + solid ; add bottom rail to kill rain drum.
Fastening: oversize holes + EPDM washers; never tighten flush—let it expand.
Clean: lukewarm water + microfiber; no ammonia, no bristles.

Red flag: “lifetime” warranty that ignores UV damage or no test report.