Review on Double Flap Endura Flap Pet Door for Walls - Extra Insulated, Cold Weather Dog Door with Aluminum Frame, Telescoping Tunnel, Locking Cover - Available in Small, Medium, Large, Extra Large Sizes - White, Tan, Black Options by Michelle Singleton

Great product. Very durable (assembly in August). After a harsh winter in the Midwest, there will be an update. People complain that professionals have problems because they did not read and fully understand the instructions (take your time, it's worth it). This setup is not easy and should only be performed by people who fully understand what they are getting themselves into. Can the guide be improved by adding more graphics? Yes. This will benefit people who jump to conclusions about the installation. Biggest Tip: Do not cut the screws/threaded rod. Hold them long and set them that way, then just bend the bar back and forth to cut it to the right length (no need to try to line up the screws with the holes as this was done BEFORE cutting) . The included silicone is designed for interiors with metal panels. Although he suggests using it outdoors, you should choose what works best for your application (i.e. able to paint dry). This will likely require a short list of additional items from your hardware store (PVC trim, acrylic latex sealant, power tool, etc.).