Hello everyone.

I'm planning a home upgrade and need advice from anyone experienced with patio or balcony doors. My current sliding glass door is drafty and the panels are damaged, but the surrounding frame is still solid and square. I want to save time and money if possible.

Has anyone successfully attempted to replace a sliding door without replacing the frame in an older home? What measurements, tools, or pitfalls should I watch out for? Are there brands or kits designed for this approach, and does it affect insulation or warranty?

Any real-world tips, photos, or lessons learned would be greatly appreciated.