For garage doors, there are two popular types. First one is Sectional Overhead Garage Door. It is with excellent thermal insulation with 40mm thick sandwich door panel. Such Residential Overhead Garage Door need big headroom space to fix onto ceiling. And its installation and maintenance are also more complex. Second type is Aluminium Roller Garage Door. Its slat is also insulated type filled with insulation material inside. But because thickness is 15mm, thinner than sectional garage door, so its thermal insulation performance is not so good as it. But Automatic Aluminum Roller Door also has some big advantages: 1. Cheap in price. 2. Easy to install. 3. Nearly zero maintenance for long term. 4. Save headroom space of garage. Kenvo brand aluminum roller shutter door uses high-density polyurethane foam to fill its slat, to realize better thermal insulation and noise insulation. And our slat is with bigger total thickness to improve such performance further. …