Shower grout typically lasts 8 to 16 years, but this varies greatly with maintenance; good upkeep, proper sealing (every 1-2 years), and ventilation can extend its life, while cracks, mold, crumbling, or discoloration signal it's time to regrout sooner. Epoxy grout can last even longer, potentially 20+ years.
Regrouting your shower and bathroom tiles is key for looks and home safety. The best time to regrout shower and bathroom tiles is when you see mold, grout color changes, or the grout is old, about 15-20 years.
Average Grout Longevity
Grout usually lasts from 8 to 15 years. The type of grout used is a primary determinant of its longevity. For instance, epoxy grout is known for its exceptional durability and resistance to water and stains, often outlasting traditional cement-based grouts.
Signs to Look Out For
You might notice discolouration, hairline cracks, or sections that crumble when touched. In severe cases, whole pieces of grout may be missing, leaving a visible gap between tiles. You may also see water pooling at the edges of your shower or notice damp spots on walls outside the shower area.
Hairline cracks, pinholes or gaps appear in the grout between tiles. Water passes through these weak points and reaches the membrane. If the membrane is damaged, poorly installed or has degraded with age, water seeps past it. Moisture then travels into the wall, floor or ceiling below the shower.
You generally should not grout directly over old grout for longevity and adhesion, as it often leads to cracking and peeling; instead, you must first remove a significant portion (at least 2mm) of the old grout, thoroughly clean the area, and then apply the new grout to ensure proper bonding and a lasting finish. Special rejuvenation grouts or epoxy grouts might require less removal, but scraping out most of the old material is the best practice for standard grout.
Guest bath and shower grout: Should be sealed every year or two, depending on frequency of use. Backsplash grout: Backsplashes in high-traffic areas should be sealed once yearly on average.
The good news is that you don't need any special skills or expensive tools to tackle this project. You don't even need to fully remove all the old grout before you put a new layer of grout on, if you do the proper work to prepare it.
The 1/3 rule for tile is a layout technique for long rectangular tiles (like wood-look planks) that recommends staggering joints by one-third of the tile's length, not the traditional 50%, to minimize lippage (uneven tile edges) caused by natural tile bowing, creating a smoother, safer, and more visually harmonious floor or wall. Instead of a standard brick-like pattern, it creates a diagonal or "stair-step" grout line, which looks more natural and helps hide slight height variations between tiles, making the surface feel flatter and more professional, especially under raking light.
Chemical cleaners, such as, Tilex, Soft Scrub, Scrubbing Bubbles, or ammonia products will nearly always result in your tile surfaces' grout becoming very discolored. If you do choose to utilize a cleaner, make sure that it's neutral in pH level to ensure it doesn't damage your grout.
Common Causes of Cracked Grout
Houses are constantly moving in tiny increments as a result of foundation settling, humidity, temperature, and other factors. If the grout in a bathroom is an inflexible material, as most grout is, cracks can develop when a bathtub moves one way while a tile wall moves another way.
Install professional-looking tiles by learning from these common grouting mistakes.
Normally, you need to leave grout for 15-30 minutes before wiping it off. Times vary between products and according to atmospheric conditions in the room. Make sure you read the label for information and keep an eye on the grout while it's drying.
Mix together one fourth cup of hydrogen peroxide with a half cup of baking soda and a teaspoon of liquid dish soap. Cover your grout with the paste and let it sit for a few minutes before scrubbing and rinsing with hot water (II).
If your grout isn't sealed, it's soaking up everything around it—moisture, dirt, bacteria, soap, and grime. That's why it keeps getting darker, harder to clean, and more worn out over time. Sealing protects the surface. It extends the life of your tile.
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.
Tile Gone Wrong: Top Tile Mistakes to Avoid By Chip Wade
Always apply adhesive horizontally with a notched trowel, rather than in a swirling motion. You should never store tiles in direct sunlight prior to fixing. Tiles should be dry, clean and free from grease, wax, oil, curing compounds, etc.
A 50% tile pattern (brick-bond) is often not recommended for larger, rectangular tiles because it exaggerates lippage, the unevenness where tile edges meet, due to natural tile warpage. This creates an unsightly "step" or shadow line where the highest point of one tile aligns with the lowest point of the next, making surfaces feel bumpy and look unprofessional, especially with long-format tiles that tend to bow in the middle from manufacturing. Professionals often suggest a 33% offset or a random pattern for better visual flow and to minimize these imperfections, say Get Tiles Online and Tile Warehouse.
4 of the Most Common Regrouting Mistakes
You generally should not grout directly over old grout for longevity and adhesion, as it often leads to cracking and peeling; instead, you must first remove a significant portion (at least 2mm) of the old grout, thoroughly clean the area, and then apply the new grout to ensure proper bonding and a lasting finish. Special rejuvenation grouts or epoxy grouts might require less removal, but scraping out most of the old material is the best practice for standard grout.
Regrouting tiles is a straightforward job that most confident DIYers can tackle themselves. Take your time when removing the old grout to avoid chipping or damaging your tiles.
Sealer is not a waterproofer it is considered a moisture barrier and stain resistant. In over 30 years demoing tile showers the only time water gets behind grout is if it cracks and doesn't get repaired. Grout sealer is also not a one and done thing it wears and needs reapplied.
Unlike a thin, clear sealant that wears away quickly, grout color sealing utilizes a durable epoxy-based formula. This advanced sealant penetrates the porous grout and creates a non-porous, permanent bond.