[DIY Wall Condensation Fix #3] Repair Complete: Finishing with Daiso Wallpaper

Direct Answer & TL;DR

Progress: The areas repaired with urethane foam and putty have fully dried over the past few days. No more moisture seeping through, so it was finally time for the wallpaper.
The Wallpaper: I used “Repair Wallpaper” from Daiso—the king of cost-effectiveness. The color doesn’t match the original perfectly, but it covers the mess beautifully, and I’m thrilled with the result.
Current Status: It stays perfectly dry most of the time, but on extremely cold nights, a tiny bit of condensation still forms just above the repaired area. However, compared to the previous “indoor flood,” it’s a massive improvement. I’m very satisfied with this outcome.

Introduction: “The Long-Awaited Finish”

Drilling holes, spraying foam, and applying putty… It’s been quite a journey. The most critical part was “complete drying,” so I waited several days with patience. Thankfully, the moisture stayed away, and it was finally time to address the aesthetics.

📚 Series Overview

Finally, Wallpaper: The Magic of Daiso

After confirming the repair site was bone dry, I watched it for a few more days. Seeing no more moisture seeping through convinced me that the “foundation work” was a success.

Now, to hide the unsightly scars of the repair! It wasn’t quite a big enough job to call a professional hanger, so I ran to the nearest Daiso.

The corner looks much cleaner with Daiso's repair wallpaper. Not bad for a DIY job, right?

The color is a bit different from the original minty green, but it gives a sort of “two-tone” vibe, and more importantly, it looks clean. Being self-adhesive made it incredibly easy to apply. Daiso never fails to impress.

Observations: “Not Perfect, But Good Enough”

I’ve spent a few more cold nights since applying the wallpaper. Here’s what I found when checking the spot first thing in the morning:

[!NOTE] Current Status Update

Repaired Area: The spot filled with urethane foam is completely dry.

Upper Boundary: Everything is fine normally, but on extremely cold nights, a small amount of condensation still forms just above where I stopped the repair.

Improvement: It’s nowhere near as bad as before. It doesn’t soak through anymore—it’s just a light dew that clears up quickly with a bit of ventilation.

It feels like the cold air is just trying to find its way around the repair, but the overall improvement is night and day. Unless I tear down the whole wall for professional insulation, this is likely as good as it gets, and I’m perfectly happy with that.

Conclusion: “I’m Satisfied!”

When I first saw the water dripping down my wall, I was overwhelmed. But after finding the cause and fixing it myself, I’ve grown to appreciate my home even more. Even with that tiny lingering bit of condensation on the coldest days, I’m very satisfied with the results.

That’s the beauty of DIY: it doesn’t have to be perfect as long as you fixed it with your own hands! No more stressing over damp patches on the wall. That alone makes it a success.

If you’re struggling with condensation, don’t be afraid to start small. Tucking away even one little gap can make a huge difference! ~~Let’s hope nothing else happens next week…~~