Costs
Regrouting or retiling: which is the better spend?
6 min read
Short answer
Regrouting is the better spend when the waterproof membrane and the tile bed are sound and only the surface has worn out, which is a very common situation. Retiling is the better spend when the membrane has failed, the bed has broken down, the falls are wrong, or you were going to change the tiles anyway. Regrouting a wet area that needs rebuilding is the one genuinely wasted option.
This is the decision most people are actually making when they call about a tired-looking bathroom, even if the question they ask is about grout.
The two options are not close in cost or disruption, so it is worth being clear about what each one is for.
What each option actually is
Regrouting removes the existing grout from between the tiles, treats what needs treating, and installs new grout and sealant. The tiles, the bed and the membrane stay where they are. It is surface work, and it is typically a day or so for a shower.
Retiling removes the tiles and usually the bed, reinstates the waterproofing to current requirements, and lays new tiles. It is a rebuild of the wet area, with demolition, waste, multiple trades in some cases, and the room out of use for considerably longer.
When regrouting is the better spend
- The membrane below the tiles is intact and the wet area is not leaking, or is leaking only through failed surface joints.
- The tiles are sound, well bonded and not drummy across the field.
- The floor falls correctly to the waste and water does not sit.
- You are happy with the tiles themselves and are not planning to change them.
- The problem is appearance, staining and worn-out joints rather than structure.
When retiling is the better spend
- The waterproof membrane has failed, was never installed, or does not extend high enough.
- Tiles sound hollow over a large area, which means the bed has lost its bond.
- The floor falls away from the waste, or water ponds on it.
- There is structural movement producing cracking that will simply reopen.
- You were going to replace the tiles within a couple of years anyway, in which case regrouting first is paying twice for one outcome.
- The bathroom is being renovated for other reasons and the wet area is coming out regardless.
The false economy in both directions
Regrouting a wet area whose membrane has failed is the clearest waste. The finish looks renewed, the leak continues, and the money spent buys nothing at all. This is why an honest assessment matters more than a low quote.
Retiling a wet area whose only problem is worn grout is the opposite error, and a much more expensive one. A sound shower with tired joints does not need demolishing, and a business that recommends it should be able to explain what it found that justifies the recommendation.
The third version is regrouting a wet area you already intend to renovate next year. That is not a wasted repair exactly, but the money is gone when the tiles come out.
How the decision gets made properly
By inspection. Sounding the tiles for debonding, checking the fall to the waste, looking at where the damp appears and when, examining the junctions, and where necessary opening up a small area to see the membrane.
A recommendation to retile should come with a reason you can see for yourself. If someone cannot point at what they found, treat the recommendation with caution, and get a second opinion before committing to a rebuild.
What to ask before you decide
- What did you find that tells you the membrane is or is not intact?
- Are the tiles drummy, and over how much of the area?
- Does the floor fall correctly to the waste?
- If we regrout, what is the realistic expectation, and what would make it fail early?
- What is not covered by the workmanship warranty in each case?
In short
- Sound membrane and sound bed means regrouting. Failed membrane or failed bed means retiling.
- Regrouting a wet area that needs rebuilding buys nothing at all.
- Retiling a sound wet area with tired joints is an expensive way to solve a cheap problem.
- A recommendation to rebuild should come with evidence you can see.
Common questions
- Is regrouting a waste of money if the bathroom is old?
- Age on its own does not decide it. An older wet area with sound waterproofing and well-bonded tiles can be a very good candidate for regrouting. What matters is the condition of the membrane and the bed, not the year the bathroom was built.
- How long will a regrout last compared with retiling?
- They are different things. Retiling renews the whole assembly including the waterproofing. Regrouting renews the wearing surface, so grout and sealant will need attention again in time, in the way any consumable does. Where the membrane is sound, that is maintenance rather than failure.
- Can you regrout part of a bathroom and retile the rest?
- Sometimes, where the problem is genuinely contained, such as a shower recess that needs rebuilding in a bathroom whose floor is fine. Matching new tiles to existing ones is often the limiting factor rather than the work itself.
Related service: Regrouting