All of the materials in your Patios Plus WA patio are of the finest quality and are built to last. Steel, sheeting and guttering has warranties of up to 12-15 years. The polycarbonate sheeting has a lifetime warranty. Our structural workmanship is guaranteed for life. Our goal is to have you purchase again and again as you upgrade your house or move home. In the unlikely event of a problem arising we will remedy this immediately.