Know Before You Dig: When Grout Actually Needs Replacing
First thing I always tell homeowners is to figure out whether you're dealing with a staining problem or a structural problem. Run your finger across the grout lines. If it's just dark and dingy but feels solid, you can clean and reseal it — no removal needed. If it's cracking, crumbling, or pulling away from the tile edges, you're regrouting. The distinction matters because a lot of people waste a Saturday scrubbing grout that needs to come out anyway.
In my experience, most tile floors in Portland homes — especially the craftsman bungalows you see throughout Sellwood and Buckman — have grout that's 20-plus years old and has never been sealed. That grout is porous, it's absorbed everything, and cleaning only goes so far. At that point, regrouting is the honest answer.
With clear sunny weather in the forecast next week and highs near 88°F, this is actually a great time to tackle an indoor tile project. Good ventilation without rain sneaking through open windows — you couldn't ask for better conditions for grout to cure properly.
The Tools and Products Worth Buying (And One to Skip)
For grout removal, I reach for an oscillating multi-tool with a grout removal blade. A manual grout saw works, but your hand will hate you by hour two. Spend the $30 on a Ryobi or Ridgid blade — it pays for itself in a single job.
For new grout, I consistently use Fusion Pro Single Component Grout by Custom Building Products. It's a premixed urethane grout that's stain-resistant right out of the bucket — no separate sealer step required. Portland's humidity and the general mess of daily life make this worth the extra few dollars over standard sanded grout.
What most people get wrong is buying the cheapest epoxy grout thinking it'll be the most durable. Epoxy grout is harder to work with than manufacturers let on, and if you're not fast and precise, it sets up before you can clean it off the tile face. Fusion Pro gives you more working time and still holds up.
The Regrouting Process, Straight Talk
Remove the old grout to about two-thirds of its depth — you don't need to go all the way to the substrate. Vacuum out the lines, wipe them down with a damp sponge, let them dry completely. This step matters more than people think. Grout applied over dusty lines won't bond correctly.
Apply the new grout diagonally across the joints with a rubber float, pack it in firmly, and give it about 15-20 minutes before doing your first cleanup pass with a damp sponge. Rinse the sponge constantly. The mistake I see all the time is homeowners using too much water during cleanup, which weakens the grout. Damp sponge, not wet.
When It Makes Sense to Call Someone
Regrouting a small bathroom floor or a mudroom entry? Most homeowners can handle it over a weekend. If you're looking at a large kitchen floor, cracked substrate beneath the tile, or tiles that are loose and need resetting before regrouting, that's a different job. If you're in the Portland metro or Vancouver and want someone to take a look before you commit to a project, reach out to us at EVN Handyman — sometimes a second set of eyes saves you from pulling up something you didn't need to touch.