What Alam Discovered During a Bathroom Remodeling Project in Tucker...

What was supposed to be a straightforward bathroom remodel quickly turned into a much more serious repair project.

Alam and the Just Services Remodeling team recently arrived at a home in Tucker, Georgia, to renovate an outdated bathroom. The original plan was relatively simple: remove the old bathtub and finishes, prepare the surfaces, and install the new materials selected for the space.

At first, there was no clear indication that a major problem was hiding underneath the bathroom. The homeowner had been using the tub without realizing that water had been slowly leaking below it.

Everything changed when Alam removed the old bathtub.

Underneath the tub, the team found mold, moisture damage, and severely deteriorated wood. Sections of the plywood subfloor were soft and rotten, and the damage had spread through the area beneath the bathtub. What looked like a normal bathroom from the outside was hiding a problem that had likely been developing for a long time.

“At that point, we could not simply cover the area and continue installing the new bathroom,” Alam explains. “The damaged materials had to be removed, the source of the leak had to be addressed, and the structure had to be properly repaired before we could move forward.”

The planned renovation was temporarily paused, and the team began a careful removal and repair process. The affected flooring and damaged wood were taken out so the underlying structure could be inspected. The area also had to be checked for additional moisture and mold before reconstruction could begin.

Once the damaged materials were removed, Alam and his team rebuilt the affected sections of the subfloor and prepared a solid foundation for the new installation. Only after the structure was dry, stable, and properly repaired could the bathroom remodeling work continue.

This experience is an important reminder for homeowners: during a bathroom renovation, the biggest challenge may not be choosing tile, fixtures, or a vanity. Sometimes, the most important work begins only after the old materials are removed.

In this case study, Alam shares what the team found during this Tucker bathroom remodel, how they handled the hidden water damage, and what homeowners should ask their contractor before installing new flooring, tile, or a bathtub.

1. What Was Hiding Under the Old Bathtub?

Before demolition begins, it is not always possible to know the exact condition of the materials underneath a bathtub, shower, vanity, or tile floor.

In this Tucker home, the finished bathroom did not clearly show how serious the problem had become. There was no large amount of visible water on the floor, and the homeowner did not know that the tub had been leaking.

However, small amounts of water had been reaching the wood structure over time. Because the area was hidden underneath the bathtub, the moisture remained trapped and gradually damaged the plywood.

When the tub was finally removed, the team discovered:

• Mold beneath the bathtub;

• Wet and deteriorated plywood;

• Rotten sections of the subfloor;

• Evidence of a long-term hidden leak;

• Wood that was no longer strong enough to support a new installation.

The discovery changed the priorities of the project. Before thinking about the new tile or bathtub, the team first needed to remove the compromised materials and determine how far the damage had spread.

This is one reason Alam recommends documenting the demolition process with photographs. Pictures allow the homeowner to see what was found and understand why additional repairs may be necessary.

2. Why Couldn’t the Team Install New Materials Over the Damage?

Installing cement board and new tile over rotten plywood would only hide the problem.

The finished bathroom might look good for a short period, but the damaged structure underneath would continue to weaken. Moisture could remain trapped, mold could continue growing, and movement in the subfloor could eventually cause the new tile or grout to crack.

Instead of covering the damage, the Just Services Remodeling team followed a repair process that included:

1. Removing the old bathtub and surrounding materials;

2. Taking out the damaged and mold-affected sections;

3. Identifying and addressing the source of the water;

4. Opening the affected area to inspect the underlying structure;

5. Checking the subfloor and nearby floor joists;

6. Allowing the area to be properly cleaned, treated, and dried;

7. Replacing the deteriorated wood;

8. Rebuilding a stable surface for the new bathroom;

9. Continuing with the cement board, waterproofing, and tile installation.

The additional work was not part of a cosmetic upgrade. It was necessary to protect the home and ensure that the new bathroom would be built on a sound structure.

3. What Should Happen Before New Bathroom Tile Is Installed?

Once the old flooring has been removed, the subfloor should be carefully inspected before any new materials are installed.

If the plywood is dry, stable, and structurally sound, the team can begin preparing the surface for tile. If damaged sections are found, those sections should be repaired or replaced first.

A simplified floor preparation process may include:

1. Removing the existing flooring and underlayment;

2. Inspecting the plywood subfloor;

3. Examining the joists when signs of water damage are present;

4. Repairing the plumbing leak or source of moisture;

5. Replacing damaged wood;

6. Installing the appropriate tile underlayment or cement board;

7. Applying the approved setting material;

8. Installing the new tile;

9. Completing the grout, transitions, and necessary sealing.

Cement board is commonly used to create a stable surface for tile. It helps provide a more suitable tile base than installing directly over a wood subfloor.

The tile is generally installed using thinset mortar. Thinset is designed to bond the tile to the prepared surface, but it should not automatically be treated as a complete waterproofing system.

Waterproofing requirements depend on the location, the substrate, the installation method, applicable building requirements, and the manufacturer’s specifications.

4. How Are Bathroom Walls Protected From Moisture?

The walls surrounding a bathtub or shower are exposed to frequent splashing, humidity, and moisture.

Tile and grout provide a durable finished surface, but they are not the only components needed to protect the wall assembly.

Behind the cement board are the wall studs, often built with 2x4 lumber. If water moves through the tile assembly and reaches these wood framing members, the moisture can cause deterioration that may remain hidden for years.

For this Tucker bathroom renovation, our team applied a waterproofing membrane over the cement board before installing the wall tile.

This protective layer helps prevent moisture from reaching the wood framing behind the finished wall.

The general process includes:

• Making sure the cement board is properly installed;

• Cleaning and preparing the surface;

• Treating seams, corners, penetrations, and changes of plane;

• Applying the waterproofing product according to its instructions;

• Achieving the required coverage and thickness;

• Allowing the membrane to dry or cure;

• Installing the tile only after the surface is ready.

Once the tile is installed, homeowners will no longer see the waterproofing membrane. Even so, it is one of the most important parts of a long-lasting tub or shower installation.

5. Product Spotlight: Why We Used RedGard Waterproofing

For the walls surrounding the new tub, Just Services Remodeling used RedGard Waterproofing and Crack Prevention Membrane.

RedGard is a ready-to-use, liquid-applied membrane designed for waterproofing beneath tile and stone installations. It is applied over an approved, properly prepared surface, such as cement backer board, and dries to create a continuous protective barrier.

For homeowners, one practical benefit of this type of product is that it helps protect the materials located behind the tile. When properly applied, the membrane creates another line of defense between moisture and the wood framing inside the wall.

RedGard can be applied with tools such as a roller, trowel, or suitable sprayer, depending on the installation requirements. The application must follow the manufacturer’s directions, particularly regarding:

• Surface preparation;

• Treatment of corners and seams;

• Required thickness;

• Number of coats;

• Drying time;

• Approved substrates;

• Tile installation procedures.

It is also easy to recognize during the project because of its strong red color. This allows the contractor to visually inspect the surface and identify areas that may need additional coverage before the tile is installed.

We chose RedGard for this project because it was appropriate for the wall assembly and tile installation being completed. However, no waterproofing product should be applied as a shortcut or without proper preparation.

The quality of the final system depends on both the product and the installation.

6. What Happens When a Contractor Ignores Damaged Wood?

One of the biggest risks during a bathroom remodel is focusing only on the visible finish.

For example, a contractor may remove the old tile and discover a dark or weakened section of plywood. Instead of investigating the problem, the contractor may install cement board or another underlayment directly over the damaged area.

Once the new tile is installed, the problem disappears from view, but it has not been repaired.

Over time, the homeowner may experience:

• Cracked tile;

• Failing grout lines;

• Movement in the floor;

• Musty odors;

• Recurring moisture;

• Mold growth;

• Additional wood deterioration;

• Damage to the floor joists;

• The need to remove the new flooring again.

A responsible contractor should stop, determine where the water came from, explain the discovery to the homeowner, and repair the affected area before continuing.

At Just Services Remodeling, we also believe that taking photographs during demolition is helpful. Photos allow the homeowner to see the condition of the structure and understand why additional repair work may be necessary.

7. Can Mold Be Found During a Bathroom Renovation?

Long-term water exposure can sometimes lead to mold growth underneath flooring or inside wall cavities.

The appropriate response depends on the extent of the moisture and the affected materials. A small, limited area may require a different approach than widespread water damage involving multiple parts of the structure.

In more extensive cases, a specialized water mitigation or mold remediation company may need to evaluate the area.

That company may assist with:

• Identifying the moisture source;

• Measuring moisture levels;

• Drying structural materials;

• Removing affected materials;

• Treating the area;

• Confirming that the space is ready for reconstruction.

Installing new flooring or closing a wall while materials are still wet can trap moisture inside the structure. For that reason, the affected area should be properly evaluated, repaired, and dried before the renovation continues.

8. What Should You Ask Your Bathroom Remodeling Contractor?

Homeowners do not need to understand every technical detail of construction. However, asking a few questions can help them follow the project and make better decisions.

Consider asking:

• Was the subfloor inspected after demolition?

• Did you find evidence of a previous leak?

• Are the floor joists in good condition?

• Does any plywood need to be replaced?

• What type of tile underlayment will be used?

• Will cement board be installed?

• What waterproofing system will be used around the tub or shower?

• Will the contractor photograph concealed damage?

• Has the source of the leak been repaired?

• Does the area need water mitigation or mold remediation?

These questions help shift the conversation beyond appearance and toward durability, safety, and workmanship.

9. What Was the Biggest Lesson From This Tucker Bathroom Remodel?

The main lesson from this project is simple: what is hidden beneath a bathroom can be more important than what is visible after the renovation.

In Tucker, removing the old bathtub revealed a leak the homeowner did not know about. The water had already damaged the plywood and surrounding wood materials.

Instead of covering the problem, our team removed the deteriorated sections and properly prepared the structure for the new installation.

Only after those repairs were completed could we move forward with the cement board, RedGard waterproofing, tile, and finished bathroom features.

For Alam, this is the difference between changing the appearance of a bathroom and completing a responsible bathroom renovation.

A Beautiful Bathroom Starts With Proper Preparation

New tile, updated fixtures, and a modern vanity can completely change the appearance of a bathroom. But the durability of the finished space depends heavily on the work completed before those materials are installed.

Inspecting the subfloor, checking the joists, repairing hidden leaks, replacing damaged wood, and applying an appropriate waterproofing system can help protect both the home and the homeowner’s investment.

Just Services Remodeling provides bathroom remodeling services in Marietta, Tucker, and surrounding communities throughout the Atlanta metropolitan area.

Explore our bathroom remodeling services, view examples of our recent projects, or subscribe to our newsletter for more renovation stories, maintenance tips, and practical guidance from the jobsite.3. What Should Happen Before New Bathroom Tile Is Installed?

Once the old flooring has been removed, the subfloor should be carefully inspected before any new materials are installed.

If the plywood is dry, stable, and structurally sound, the team can begin preparing the surface for tile. If damaged sections are found, those sections should be repaired or replaced first.

A simplified floor preparation process may include:

1. Removing the existing flooring and underlayment;

2. Inspecting the plywood subfloor;

3. Examining the joists when signs of water damage are present;

4. Repairing the plumbing leak or source of moisture;

5. Replacing damaged wood;

6. Installing the appropriate tile underlayment or cement board;

7. Applying the approved setting material;

8. Installing the new tile;

9. Completing the grout, transitions, and necessary sealing.

Cement board is commonly used to create a stable surface for tile. It helps provide a more suitable tile base than installing directly over a wood subfloor.

The tile is generally installed using thinset mortar. Thinset is designed to bond the tile to the prepared surface, but it should not automatically be treated as a complete waterproofing system.

Waterproofing requirements depend on the location, the substrate, the installation method, applicable building requirements, and the manufacturer’s specifications.

4. How Are Bathroom Walls Protected From Moisture?

The walls surrounding a bathtub or shower are exposed to frequent splashing, humidity, and moisture.

Tile and grout provide a durable finished surface, but they are not the only components needed to protect the wall assembly.

Behind the cement board are the wall studs, often built with 2x4 lumber. If water moves through the tile assembly and reaches these wood framing members, the moisture can cause deterioration that may remain hidden for years.

For this Tucker bathroom renovation, our team applied a waterproofing membrane over the cement board before installing the wall tile.

This protective layer helps prevent moisture from reaching the wood framing behind the finished wall.

The general process includes:

• Making sure the cement board is properly installed;

• Cleaning and preparing the surface;

• Treating seams, corners, penetrations, and changes of plane;

• Applying the waterproofing product according to its instructions;

• Achieving the required coverage and thickness;

• Allowing the membrane to dry or cure;

• Installing the tile only after the surface is ready.

Once the tile is installed, homeowners will no longer see the waterproofing membrane. Even so, it is one of the most important parts of a long-lasting tub or shower installation.

5. Product Spotlight: Why We Used RedGard Waterproofing

For the walls surrounding the new tub, Just Services Remodeling used RedGard Waterproofing and Crack Prevention Membrane.

RedGard is a ready-to-use, liquid-applied membrane designed for waterproofing beneath tile and stone installations. It is applied over an approved, properly prepared surface, such as cement backer board, and dries to create a continuous protective barrier.

For homeowners, one practical benefit of this type of product is that it helps protect the materials located behind the tile. When properly applied, the membrane creates another line of defense between moisture and the wood framing inside the wall.

RedGard can be applied with tools such as a roller, trowel, or suitable sprayer, depending on the installation requirements. The application must follow the manufacturer’s directions, particularly regarding:

• Surface preparation;

• Treatment of corners and seams;

• Required thickness;

• Number of coats;

• Drying time;

• Approved substrates;

• Tile installation procedures.

It is also easy to recognize during the project because of its strong red color. This allows the contractor to visually inspect the surface and identify areas that may need additional coverage before the tile is installed.

We chose RedGard for this project because it was appropriate for the wall assembly and tile installation being completed. However, no waterproofing product should be applied as a shortcut or without proper preparation.

The quality of the final system depends on both the product and the installation.

6. What Happens When a Contractor Ignores Damaged Wood?

One of the biggest risks during a bathroom remodel is focusing only on the visible finish.

For example, a contractor may remove the old tile and discover a dark or weakened section of plywood. Instead of investigating the problem, the contractor may install cement board or another underlayment directly over the damaged area.

Once the new tile is installed, the problem disappears from view, but it has not been repaired.

Over time, the homeowner may experience:

• Cracked tile;

• Failing grout lines;

• Movement in the floor;

• Musty odors;

• Recurring moisture;

• Mold growth;

• Additional wood deterioration;

• Damage to the floor joists;

• The need to remove the new flooring again.

A responsible contractor should stop, determine where the water came from, explain the discovery to the homeowner, and repair the affected area before continuing.

At Just Services Remodeling, we also believe that taking photographs during demolition is helpful. Photos allow the homeowner to see the condition of the structure and understand why additional repair work may be necessary.

7. Can Mold Be Found During a Bathroom Renovation?

Long-term water exposure can sometimes lead to mold growth underneath flooring or inside wall cavities.

The appropriate response depends on the extent of the moisture and the affected materials. A small, limited area may require a different approach than widespread water damage involving multiple parts of the structure.

In more extensive cases, a specialized water mitigation or mold remediation company may need to evaluate the area.

That company may assist with:

• Identifying the moisture source;

• Measuring moisture levels;

• Drying structural materials;

• Removing affected materials;

• Treating the area;

• Confirming that the space is ready for reconstruction.

Installing new flooring or closing a wall while materials are still wet can trap moisture inside the structure. For that reason, the affected area should be properly evaluated, repaired, and dried before the renovation continues.

8. What Should You Ask Your Bathroom Remodeling Contractor?

Homeowners do not need to understand every technical detail of construction. However, asking a few questions can help them follow the project and make better decisions.

Consider asking:

• Was the subfloor inspected after demolition?

• Did you find evidence of a previous leak?

• Are the floor joists in good condition?

• Does any plywood need to be replaced?

• What type of tile underlayment will be used?

• Will cement board be installed?

• What waterproofing system will be used around the tub or shower?

• Will the contractor photograph concealed damage?

• Has the source of the leak been repaired?

• Does the area need water mitigation or mold remediation?

These questions help shift the conversation beyond appearance and toward durability, safety, and workmanship.

9. What Was the Biggest Lesson From This Tucker Bathroom Remodel?

The main lesson from this project is simple: what is hidden beneath a bathroom can be more important than what is visible after the renovation.

In Tucker, removing the old bathtub revealed a leak the homeowner did not know about. The water had already damaged the plywood and surrounding wood materials.

Instead of covering the problem, our team removed the deteriorated sections and properly prepared the structure for the new installation.

Only after those repairs were completed could we move forward with the cement board, RedGard waterproofing, tile, and finished bathroom features.

For Alam, this is the difference between changing the appearance of a bathroom and completing a responsible bathroom renovation.

A Beautiful Bathroom Starts With Proper Preparation

New tile, updated fixtures, and a modern vanity can completely change the appearance of a bathroom. But the durability of the finished space depends heavily on the work completed before those materials are installed.

Inspecting the subfloor, checking the joists, repairing hidden leaks, replacing damaged wood, and applying an appropriate waterproofing system can help protect both the home and the homeowner’s investment.

Just Services Remodeling provides bathroom remodeling services in Marietta, Tucker, and surrounding communities throughout the Atlanta metropolitan area.

Explore our bathroom remodeling services, view examples of our recent projects, or subscribe to our newsletter for more renovation stories, maintenance tips, and practical guidance from the jobsite.