Choosing the Right Window Frames

When it comes to installing retrofit windows, selecting the right types of frames and nailing fins is crucial for both appearance and performance. The nailing fin is what creates the seal around each window, so it needs to match the exterior surface of your home. If your house has stucco siding, dual wall retrofit fins are the best choice. They provide a flat surface to apply caulking, creating a watertight seal against the stucco.

On the other hand, if you have one-by trim around your windows, you should go with single wall fins. This style sits flush without extending past the trim, which helps maintain a neat appearance and doesn’t compromise the caulk line.

Installing the wrong window frames can result in visible gaps, poor sealing and an unprofessional look. If you’re unsure which option is right for your home, don’t worry—an experienced window company can help you assess your siding and trim to make the best decision.