Short answer: no. Spreading new grout over old grout is one of the most common DIY mistakes, and it almost always fails. The new layer is too thin to bond, so it cracks, flakes and pops out within months, usually taking the old grout with it. To regrout the right way, the old grout has to come out first.
Why Grout Over Grout Fails
- No room to bond: a thin skim coat sits on top of the old grout instead of locking into the tile joint.
- Dirt and soap scum get trapped: old grout is full of residue, mold and sealer that new grout can’t stick to.
- It hides the real problem: cracked or crumbling grout is often a sign of movement, moisture or a failed install. Covering it up doesn’t fix why it broke.
- It looks patchy: the new grout rarely matches, so you end up with uneven, blotchy joints.
How Professional Regrouting Is Done
- Remove the old grout: we cut and grind out the old grout to a proper depth without chipping the tile.
- Clean the joints: we vacuum and clean every joint so the new grout bonds to clean, sound surfaces.
- Regrout: we pack the joints full with new grout. On shower floors and wet areas we use Laticrete SpectraLOCK PRO, a true 3-part epoxy grout that’s stain-proof and waterproof once cured.
- Recaulk: every corner and change of plane gets fresh caulk, because grout in corners cracks as the house moves.
- Seal or color seal: cement grout on walls and floors gets sealed for added protection.
Professional shower floor epoxy regrouting with Laticrete SpectraLOCK PRO epoxy grout.
When You Don’t Need to Regrout
Not all ugly grout needs to be replaced. If your grout is stained or dark but still solid, a deep clean with 350° vapor steam and a grout color seal can make it look brand new for a fraction of the cost. We’ll tell you honestly which one your floor or shower needs.
What About a Leaking Shower?
If water is leaking into the ceiling below or outside the shower, regrouting usually won’t fix it. Grout and caulk are only the first lines of defense. Leaks like that come from a failed liner or poor waterproofing underneath, and the fix is rebuilding the shower base or the shower.
How Much Does Regrouting Cost?
Recaulking starts around $200. Epoxy regrouting of a shower floor starts around $950. Standard regrouting is usually ready to use in about 3 days, and epoxy grout fully cures in 14 days. Every quote is free.
Frequently Asked Questions
Can I put new grout over old grout?
No. New grout over old grout is too thin to bond and will crack and flake out. The old grout needs to be removed first.
How deep does old grout need to be removed?
Deep enough for the new grout to fill and lock into the joint, not just sit on top. We remove it with professional tools that won’t chip your tile.
Is epoxy grout better than regular grout?
For shower floors and wet areas, yes. Epoxy grout is waterproof and stain-proof once cured and doesn’t need sealing.
Can stained grout be fixed without regrouting?
Often, yes. If the grout is solid, cleaning and color sealing can make it look new without the cost of regrouting.
Get Your Grout Fixed Right
Prestige Grout has been regrouting and restoring showers and floors across Chicagoland since 2012. See our regrouting and recaulking services, or call or text (708) 582-6904 for a free quote.
