14 Mistakes to Avoid When Tub-to-Shower Conversion

Robert Brown

By Robert Brown

Last Updated on March, 2025

Thinking about tackling a tub-to-shower conversion? 

Great choice! 

Showers are modern, space-saving, and practical. But I’ve got to warn you, this isn’t a “wing it and hope for the best” type of project. 

A bathtub to shower conversion can go wrong fast if you’re not careful. Let’s chat about the most common mistakes made and how you can avoid them.

Quick Summary

  • Skipping the planning phase can lead to costly mistakes, such as uncovering hidden damage or misaligning plumbing and drains. Proper preparation ensures a smoother conversion process.
  • Cheap materials may crack or leak, and DIY efforts often lead to errors. Invest in durable materials and hire professionals for tasks like plumbing and waterproofing to avoid long-term issues.
  • Keep features like natural light, proper ventilation, and storage in mind. Neglecting these can make the space less functional and increase the risk of mold or clutter.

Mistakes Made With Doing Tub to Shower Conversions

A bathroom with a contemporary bathtub

1. Skipping the Planning Phase

Jumping into a tub-to-shower conversion without a plan? 

That’s a recipe for disaster. 

You need to think about the plumbing system, the type of shower pan you’ll use, and how to waterproof the space. Too many people rush into tearing out the existing tub only to realise later they forgot something important.

For example, do you know what’s lurking under your old tub? 

Could be broken pipes, water damage, or even mould. Ignoring these problems can lead to costly repairs down the line. Take your time and map out the whole conversion project before you even pick up a hammer.

2. Choosing the Cheapest Materials

We’ve all been there, trying to save money by going for the cheapest materials. 

But trust me, this is not the place to cut corners. 

Cheap materials crack, discolour, and even leak, ruining your beautiful new shower. Spend a little more upfront for better materials like durable acrylic or fibreglass for your shower pan. It’ll last longer, look better, and save you from headaches later.

3. Measuring Incorrectly

Measuring is boring, I get it. But skipping this step or getting it wrong is one of the most common mistakes. 

A wrong size shower can make your bathroom feel cramped and awkward. Worse, your shower door might not swing open properly, or the drain won’t line up.

Take the time to measure the bathtub area carefully, length, width, height, the works. And don’t forget to account for shower installation details like door clearance and floor slope.

If measuring isn’t your thing, call in a professional team to help.

A contemporary shower and bathtub with a dark hue

4. Removing the Only Bathtub

Before you say goodbye to your existing tub, think about this: is it the only one in the house? 

If so, ripping it out might be a big mistake. Families with kids or pets often need at least one bath. Keeping a tub can maintain your home’s appeal for future buyers.

5. DIY Gone Wrong

I know, watching those DIY shows makes everything look easy. But a tub-to-shower conversion isn’t as simple as swapping one for the other. 

It involves plumbing, waterproofing, and precise installation. 

One small mistake, like misaligning the shower pans, can lead to leaks, water damage, or even structural issues.

Unless you’re a seasoned pro, hire professional contractors to handle the job. It’s worth it to avoid costly errors that might need fixing later.

6. Forgetting Drain Placement

A wet room with a drain

Where the water goes is kind of a big deal, right? 

A poorly placed drain can cause standing water, mold, and even bad smells. Make sure the drain aligns with the shower pan and sits at the lowest point of the shower floor. Proper drainage is a small detail that makes a huge difference.

7. Blocking Natural Light

Nobody likes a dim bathroom, but blocking windows during a bathtub to shower conversion is more common than you’d think. 

If you’ve got a window in your tub area, keep it! You can use frosted glass or a well-placed curtain to balance privacy with natural lights.

8. Using Poorly Designed Shower Doors

Not all shower doors are created equal. Some let water splash onto the floor, while others are too short, leaving tall folks bumping their heads. Sliding doors or frameless options often work best for tight spaces and keep water where it belongs, in the shower.

9. Skipping Accessibility Features

Adding features like grab bars, low-threshold entries, and built-in benches isn’t just for seniors. These upgrades make your new shower more convenient for everyone. And hey, if you ever sell the house, buyers will love the thoughtfulness.

10. Ignoring Hidden Damage

A water leakage in a bathroom

Your old tub might be hiding secrets – water damage, broken pipes, or a weak subfloor. Skipping repairs during a tub-to-shower conversion can turn a manageable project into a disaster waiting to happen. Address these issues upfront to avoid repairs in the long run.

11. Overlooking Ventilation

Humidity is the enemy of a healthy bathroom. Without proper ventilation, your beautiful new shower can turn into a breeding ground for mold. Install or upgrade an exhaust fan and position it near the shower for maximum effectiveness.

12. Rushing the Job

Let’s be honest, everyone wants their tub-to-shower conversion done yesterday. But rushing through it is a big mistake. A sloppy installation can lead to cracks, leaks, and uneven tiles. Allow enough time to do the job right the first time.

13. Not Thinking About Storage

Where are you going to keep your shampoo, soap, and razors? 

Neglecting storage solutions during a shower conversion can make your space feel cluttered. Add niches, corner shelves, or waterproof caddies to keep things tidy and within easy access.

14. Misjudging the Costs

It’s easy to underestimate how much a conversion project will cost, especially if you’re trying to save a few dollars. From the materials to the labour, unexpected expenses can pop up. Research thoroughly, compare quotes, and don’t forget to budget for the unexpected.

The Right Way to Do a Tub-to-Shower Conversion

A bathroom with a bathtub and a shower

To avoid these mistakes, here’s what you should do:

  • Plan every step of the process, from plumbing to design.
  • Use high-quality material and avoid cheap material.
  • Work with a professional contractor to handle tricky parts like shower pan installation and waterproofing.
  • Fix existing issues like broken pipes and water damage before starting the conversion project.
  • Make sure your new shower fits your bathroom space and style.
  • Don’t forget about ventilation, lighting, and storage.

More guides:

Final Thoughts

A tub-to-shower conversion is a smart way to upgrade your bathroom, but it’s not without its challenges. By avoiding these mistakes people make with doing tub to shower conversions, you’ll save yourself time, money, and frustration. 

If you’re ready to start but feel overwhelmed, reach out to a professional team to guide you through the process.

FAQs

Yes, it’s a good idea if you prefer functionality and modern design, but keep one tub for resale value.

Replacing a bathtub with a shower can be moderately difficult, requiring plumbing adjustments, demolition, and installation. Professional help is often recommended for a seamless result.

The average cost of converting a tub to a walk-in shower ranges from $2,000 to $8,000, depending on materials, design, and labor.

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