While traditional aluminium patio doors are best-suited for mild climates, our thermally-improved aluminium patio doors are ideal in extreme weather conditions. In fact, their C-30 or higher structural ratings make them a perfect choice for light commercial buildings such as schools, restaurants, and government buildings.

All our aluminum sliding doors have sealed, mechanically joined corners that stay square and true over years of use. They keep your home dry year-round. What's more, every Milgard Thermally Improved aluminium patio door features our energy-efficient SunCoat Low-E glass and our industry-leading Full Lifetime Guarantee.