What happens if you don't reseal grout?

Author: Alf Brekke  |  Last update: Monday, December 29, 2025

Unsightly Grout Stains and Discoloration: One of the most noticeable effects of neglected grout sealing is the gradual accumulation of stains and discoloration. Grout is porous by nature, which means it readily absorbs liquids, dirt, and debris.

Why do contractors not seal grout?

Whoever installed your floors most likely did not seal the grout because it needs time to harden and cure completely.

Is sealing grout worth it?

Grout is porous and will absorb liquids that are spilled on it. It is always recommended to seal grout because sealed grout keep clean bathroom, kitchen. Even sealed grout prevent it from moulds. When professional sealed the grout it makes the tile and grout waterproof.

What happens if you leave grout on too long?

The grout can dry out as well as not seal which will allow water under it which in turn can cause damage to everything making up the floor including the tile and any other material (wood, the structure of the building) under it. Water causes damage to the structure of a building.

Can you seal grout years later?

You can seal the grout the day after you applied it or 100 years later. If it isn't dirty, seal all three sides of the shower with a tile sealer or masonry sealer. That will make the grout water-resistant, if not waterproof, and help prevent the growth of mold and dirt.

Why Seal your grout

What happens to grout if you don't seal it?

Unsightly Grout Stains and Discoloration:

One of the most noticeable effects of neglected grout sealing is the gradual accumulation of stains and discoloration. Grout is porous by nature, which means it readily absorbs liquids, dirt, and debris.

Is it OK to put new grout over old grout?

You can apply new grout right over the top of the old grout. To do this, all you need is a grout removal tool. Use the tool to strike out the old grout, making sure the depth is at least 2mm, which is about the thickness of two dimes stacked one on top of the other.

How long can grout sit before wiping?

As mentioned earlier, the specific recommended waiting time for grout to set and dry will vary based on the product and brand you are using. However, a common guideline is to wait approximately 15 to 30 minutes after applying the grout before wiping off the excess.

What is the lifespan of grout?

There are a number of factors that can cause cracks and issues in the grout. But if cared for properly, grout can last for up to twenty years.

How do you know if grout is bad?

Check the color and condition in some of the higher-traffic areas of the room. If you notice any chipping or cracking in the grout, it won't respond well to cleaning and will most likely just break apart if you try to clean it with any kind of physical force.

How do I know if my grout needs sealing?

The next step for you to take is to inspect the grout properly. If it gets darker or changes color, it is a clear indicator that the grout hasn't been sealed.

What is the best grout that does not need to be sealed?

Epoxy grout doesn't need to be sealed at all.

Is it expensive to seal grout?

The price depends on the tile material and size, the condition of the grout, and whether you hire a professional or DIY. The average cost to seal grout is $150 to $250 for 160 square feet of space, including materials and labor, though the price depends on the size of your tiles and the condition of your grout.

What are the disadvantages of sealing grout?

The Drawback of Using Grout Sealer

Moisture can still pass through most sealers, meaning grout isn't entirely waterproof even when sealed. Over time, grout in areas like bathrooms will naturally stain or show signs of aging, regardless of sealing.

Will grout crack if not sealed?

Any type of material can be susceptible to cracking if not sealed correctly. This will keep moisture out to keep the grout from deteriorating.

How often should you reseal grout?

For high-traffic areas, like the main bathroom, you should consider sealing it every six months, while low-traffic areas like the guest bathroom can be resealed every two years. If you are using epoxy grout, it might not be necessary to reseal it as it is highly water-resistant.

How to tell if grout needs replacing?

How Do I Know if I Need Grout Repair?
  1. The Grout is Cracked or Chipped. If there is a chip or a crack in the grout, even just a small amount of damage, it is crucial that a repair is made as soon as possible. ...
  2. The Grout Lines Appear Thin or are Deteriorating. ...
  3. The Grout was Previously Installed Incorrectly.

Does grout go bad if not used?

The shelf life of grout once opened is typically 6 months, but this will vary depending on the brand and how it is stored.

How do professionals remove grout haze?

The resulting haze cannot be removed with water alone. Grout haze remover is a specialty commercial cleaner that helps to get rid of grout haze—especially in substantial or difficult cases. Grout haze remover comes in different formulas both cement-based and non-cement-based grouts.

What happens if you don't wipe grout off tile?

Waiting too long to wipe grout could result in unsightly grout haze. Don't wait too long to wipe off grout!

Can you grout over grout?

You don't have to remove all of your old grout to apply the new grout. The new grout can be applied right over the top of the existing grout. You will need a grout removal tool, which is a small tool with a sharp blade capable of chipping away the grout.

Is it cheaper to regrout or retile?

Do You Regrout or Retile? The average cost of tiling a shower is about $1,800–$5,000. Retiling a shower will be a few hundred dollars more once you factor in $2–$5 per square foot to remove the old tiles. Regrouting shower tiles costs significantly less, with an average price range of $700–$1,500.

Do grout pens work?

This really works! The grouting around the tiles in our kitchen and bathroom was looking very tried with several black damp spots. The grout pen covered it all in one coat and was very simple and quick to use. We added an extra coat on the very stained sections and now it all looks like fresh grouting.

What happens if you don't remove old grout?

Poor adhesion: If you choose to regrout over old grout, the new grout may not bond well to the old grout, leading to a less durable finish. Sloppy appearance: The end result of regrouting over old grout might not be as aesthetically pleasing, because the new grout layer can appear uneven.

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