How to Shim a Toilet: Essential Steps for Stability

ByGeorge Orwell Updated

How to Shim a Toilet?

To shim a toilet, you will need plastic or wood shims, a rubber mallet, and a knife or multi-tool.

First, locate the gap between the toilet base and the floor causing the wobbling.

Place a shim next to the gap and gently tap it in using the rubber mallet.

Repeat this process until the toilet is level.

Trim any excess shim with a knife if necessary.

It is recommended to caulk the base of the toilet for a clean look and to prevent water and waste from entering gaps.

Shimming a toilet can be done without professional help using basic tools and DIY skills.

Key Points:

  • Gather necessary materials:
  • plastic or wood shims
  • rubber mallet
  • knife or multi-tool
  • Identify the gap between the toilet base and the floor causing the wobbling
  • Place a shim next to the gap and gently tap it in using the rubber mallet
  • Repeat this process until the toilet is level
  • Trim any excess shim with a knife if necessary
  • Caulk the base of the toilet for a clean look and to prevent water and waste from entering gaps

Did You Know?

1. In Ancient Rome, rooftop lavatories were built with wooden seats which were often unstable. To prevent them from wobbling, people would use small pieces of cork, wood, or even leather strips as shims to stabilize the toilet seat.
2. The world’s tallest toilet is located at an altitude of 16,000 feet atop Mount Everest. It was installed to cater to mountaineers and is specifically designed to combat the challenges of extreme weather and low oxygen levels.
3. The concept of a flushing toilet dates back to ancient India, where the Indus Valley Civilization utilized an elaborate underground sewage system, complete with private and public toilets that featured hydraulic flushing mechanisms.
4. In 2008, a Japanese company developed a unique toilet seat which analyzes a person’s urine and provides health feedback by measuring glucose levels, body temperature, and even blood pressure. This innovation aimed to encourage regular health check-ups and early disease detection.
5. During the 19th century, high-end European toilets were sometimes fitted with musical devices that played tunes when the user flushed. These musical toilets were particularly popular among the aristocracy and were regarded as a symbol of luxury and sophistication.

1) Why Shimming A Toilet Is Necessary

Shimming a Toilet to Solve Uneven Floor Issues

When dealing with an uneven bathroom floor, it is important to address the problem of a rocking and unstable toilet. This issue not only leads to potential leaks but can also cause damage to the toilet. Fortunately, there is a simple and effective solution: shimming.

What is Shimming?

Shimming involves placing wedges, often made of plastic or rubber, beneath the toilet to level it and provide stability. By strategically positioning the shims in the areas where the floor is uneven, we can ensure that the toilet sits firmly on the floor without any wobbling.

The Importance of Shimming

Shimming the toilet has numerous benefits, including:

  • Preventing leaks: A level toilet reduces the risk of water seepage, minimizing the chance of leaks and potential water damage to the floor and subfloor.
  • Protecting the toilet: By eliminating rocking and instability, shimming helps prevent stress on the toilet’s base and components, reducing the likelihood of cracks or breakage.
  • Enhancing user comfort: A level toilet ensures a comfortable and secure seating position, making it easier for users to sit and stand without any unease or imbalance.
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How to Shim a Toilet:

  1. Identify the uneven areas: Start by carefully inspecting the bathroom floor and noting the locations where the toilet is rocking or not lying flat.
  2. Gather the necessary materials: Obtain plastic or rubber shims, which are readily available at most hardware stores.
  3. Begin the shimming process: Place the shims strategically beneath the toilet base, focusing on the identified uneven spots. Gradually add shims until the toilet rests evenly and securely on the floor.
  4. Test for stability: Sit on the toilet and check for any movement or rocking. If the toilet remains stable, proceed to the next step, otherwise, readjust the shims until the desired stability is achieved.
  5. Trim and conceal the shims: Once the toilet is stable, trim any excess length from the shims using a utility knife. Then, apply caulk or a trim ring around the shims to conceal them and create a neat finish.

Note: If you are uncomfortable with shimming the toilet yourself or if the floor is severely uneven, it is advisable to seek professional assistance to ensure the job is done correctly and to avoid any potential damage.

By following these steps and properly shimming the toilet, you can effectively resolve the issue of an uneven floor and enjoy a stable and secure bathroom fixture.

  • Plastic or rubber shims are commonly used for toilet shimming.
  • Shimming prevents leaks, protects the toilet, and enhances user comfort.

2) Types Of Shims For Toilet Installation

When it comes to shimming a toilet, it is important to choose the right type of shim. The two most recommended materials for shims are plastic and wood. Plastic shims are highly durable, stable, and resistant to moisture, making them perfect for use in bathrooms. Wooden shims are versatile but not recommended for use in kitchens due to high exposure to moisture.

Rubber shims are another option to consider. They are strong, grippy, and won’t scratch the floor. They are more suitable for appliances like washing machines and pipes.

It is also important to consider the size of the shim. There are different sizes available to ensure a perfect fit for the toilet and the specific project at hand. Some shims, like nylon plastic and flexible plastic shims, offer more flexibility and stability compared to others.

The choice of shim should be based on the specific needs and requirements of the toilet installation. Using plastic or wood shims will help prevent water damage and ensure a reliable and stable toilet installation.

3) Tools Needed For Shim Installation

To successfully shim a toilet, you will need the following essential tools:

  • Rubber mallet: This tool is used to gently tap the shims into place without causing any damage to the toilet or the floor.

  • Shims: Choose either plastic or wood shims, depending on your preference. These shims are what you will use to level the toilet.

  • Knife or multi-tool: Having a knife or multi-tool on hand is helpful for trimming any excess shims if necessary. This step ensures a clean and visually pleasing result.

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Remember, using the right tools and taking your time to properly shim the toilet will ensure a stable and balanced installation.

4) Step-By-Step Guide: How To Shim A Toilet

Here are the improved and edited steps for shimming a toilet:

Step 1: Start by locating the gap between the toilet base and the floor that is causing the wobbling. Inspect the area to understand where the shims will be inserted.

Step 2: Clean up any debris or dirt from the gap to allow for a secure fit of the shims.

Step 3: Place a shim next to the gap and gently tap it in using the rubber mallet. Take care to distribute the force evenly to avoid any damage.

Step 4: Repeat this process on all sides of the toilet, checking for stability after each shim is inserted. Ensure that the toilet is level and does not rock.

Step 5: If necessary, use a knife or multi-tool to trim off any excess shim that extends beyond the base of the toilet.

Step 6: Once the toilet is stable and level, consider caulking the base of the toilet for a clean look and to prevent water and waste from entering any gaps.

5) Other Uses For Toilet Shims

Toilet shims are a versatile tool that can be used for various purposes beyond just shimming toilets. They can be effectively utilized to level other bathroom fixtures, including bathtubs and bathroom vanity units. When it comes to leveling bathtubs and bathroom vanity units, it is recommended to use plastic shims. On the other hand, rubber shims are more suitable for appliances like washing machines and pipes.

In summary, toilet shims can serve multiple functions:

  • Shimming toilets
  • Leveling bathtubs and bathroom vanity units (plastic shims)
  • Adjusting appliances like washing machines and pipes (rubber shims)

6) Tips For Achieving A Level And Stable Toilet

To ensure a level and stable toilet, here are a few helpful tips:

  • Test the toilet for wobbling before applying any caulk. This allows you to make any necessary adjustments and ensures a solid foundation.

  • If the toilet continues to wobble even after shimming, it may be necessary to remove the toilet bowl and check for issues with the flange or wax seal. Addressing these issues promptly will prevent further problems in the future.

  • By following the step-by-step guide provided and using the right shims and tools, shimming a toilet can be done without professional help. It is a task that can be accomplished using basic tools and DIY skills.

Note: Shimming a toilet is a simple yet essential step in achieving a stable and level toilet installation.

In conclusion, by using the right shims, tools, and following the step-by-step guide provided, you can ensure a visually pleasing and stable toilet that will provide years of trouble-free use.

  • Test the toilet for wobbling before applying any caulk.
  • If needed, remove the toilet bowl to check for issues with the flange or wax seal.
  • Shimming a toilet can be done without professional help using basic tools and DIY skills.

Check this out:

Frequently Asked Questions

What kind of shim do you use for a toilet?

When it comes to leveling a toilet, it is recommended to use plastic or wood shims. These materials offer resilience to water damage, which is essential in a wet environment like a bathroom. Plastic shims provide a durable and long-lasting option, while wood shims offer a natural and traditional approach to stabilize the toilet. By utilizing these shims, you can ensure a sturdy and stable toilet installation, enhancing your overall bathroom experience.

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Does it matter if toilet is level?

Ensuring a level toilet is of utmost importance. While it may seem like a minor concern, an unlevel toilet can lead to various problems in the long run. If the toilet is not completely flat, it can rock, compromising its stability and increasing the likelihood of leaks occurring over time. Furthermore, an unbalanced toilet can also cause discomfort during use, as it may shift or wobble unexpectedly. Therefore, taking the time to confirm and adjust the level of a toilet before bolting it down can save you from potential headaches and issues down the line.

1. What are the different methods and materials that can be used to properly shim a toilet?

There are several methods and materials that can be used to properly shim a toilet. One common method is to use plastic toilet shims, which are small wedges that can be inserted under the base of the toilet to level it. These shims are easy to adjust and can be stacked if additional height is needed. Another method is to use a wax ring with a built-in plastic ring, which can help create a level and secure seal between the toilet and the floor. This method is especially useful when dealing with uneven or sloping floors.

In addition to these methods, there are other materials that can be used to shim a toilet. Some people use rubber shims, which are similar to plastic shims but provide more flexibility and stability. Others may opt for using wooden shims, although these are less common as they can compress over time and require more maintenance. Regardless of the method or material used, it’s important to ensure that the toilet is level and stable to prevent leaks and damage to the flooring.

2. Are there any potential risks or complications that may arise when attempting to shim a toilet, and how can they be effectively addressed?

There are a few potential risks or complications that may arise when attempting to shim a toilet. Firstly, if the toilet is not properly leveled or stabilized, it can lead to leaks or a wobbly fixture. This can cause water damage to the flooring, potentially leading to costly repairs. Secondly, using incorrect or inadequate shims can result in the toilet becoming uneven or unstable over time.

To effectively address these risks and complications, it is important to follow proper installation techniques. Ensure that the toilet is correctly leveled and stabilized before shimming. Use high-quality and durable shims specifically designed for toilet installations to prevent them from shifting or compressing over time. It is also recommended to consult a professional plumber if you are unsure about the process or if you encounter any problems during installation. They will have the expertise to address any potential issues and ensure the toilet is properly shimmed to prevent complications.

References: 1, 2, 3, 4