Once pipes and conduits are hidden behind plaster or tiles, your memory of exactly where they run fades fast. Years later, when you want to drill for a new shelf, hack a niche, or fix a leak, you’re guessing. That guess can easily hit a pipe or cable.
Taking clear photos of each wall—straight on, and maybe with rough measurements noted—creates a visual map of the “inside” of your house. Store them in a folder labelled by room.
Later, you or any professional can refer back before drilling or cutting. It reduces the risk of accidental damage and speeds up troubleshooting if there’s a problem. It’s like having X-ray vision for your own walls, using nothing more than your phone at the right stage.