Patio Door Repair vs. Replace Advisory Service & Guides

Homeowners with older sliding doors, like the one from a pre-1988 home in Montreal showing a "white band" (a sign of thermal seal failure), often wonder if a full replacement is really needed. This question, "What should I do about this patio door?" is a common one. A guide or video tutorial, or even an advisory service, could help them figure out the issue and learn that replacing just the insulated glass unit (thermo glass) might be a more cost-effective solution, as one commenter suggested.

Expected benefit: Revenue from selling guides, consultation fees, or affiliate income from glass replacement services.