What Is Underskinning on a Pontoon Boat? (Best Guide)

Pontoon Underskinning

Pontoon Underskinning, also known as under-decking or bottom sheeting, is a process of adding an extra layer of material to the underside of a pontoon boat’s deck.

This material is typically made of aluminum, but can also be made of other materials such as plastic or composite.

Pontoon Underskinning

How To Underpin A Pontoon Boat?

Underpinning a pontoon boat involves adding a layer of material to the underside of the boat’s deck to create a barrier between the pontoons and the water. Here are the general steps for underpinning a pontoon boat:

  • Measure the area to be covered: Measure the length and width of the boat’s deck to determine the amount of material needed for the underpinning.
  • Choose the material: Select the appropriate material for the underpinning, such as aluminum, plastic, or composite materials.
  • Prepare the deck: Clean the underside of the deck to remove any dirt, debris, or corrosion. Make sure the surface is smooth and free from any rough or sharp edges.
  • Cut the material: Cut the underpinning material to the appropriate size using a saw or cutting tool. Leave a little extra material on the edges to allow for overlap.
  • Install the material: Starting at the front of the boat, install the underpinning material by attaching it to the underside of the deck. Use screws or rivets to secure the material in place, making sure to create a tight, snug fit. Continue installing the material until you reach the back of the boat.
  • Overlap the material: Once the underpinning material is installed, overlap the edges of the material by several inches and secure them with screws or rivets to create a watertight seal.
  • Finish the edges: Install trim pieces along the edges of the underpinning material to create a finished look and protect the material from damage.

Overall, underpinning a pontoon boat can be a straightforward process with the right tools and materials.

However, it is important to follow all safety guidelines and manufacturer instructions to ensure a secure and durable installation.

What Is An Underpinning Kit?

A Pontoon underpinning kit is a set of marine-grade aluminum sheets that can be installed underneath your pontoon boat. It eliminates the studs, rivets, and other protrusions that cause drag and impede water flow.

How Does It Work?

A thin layer of aluminum sheeting under the deck eliminates these protrusions, reducing drag and creating a smoother surface for water to move over. This improves the performance of your boat, reducing fuel use and increasing engine life.

How Fast Does Underpinning a Pontoon Make Your Boat?

On average, underpinning your pontoon will give you a slight increase in speed. However, if you combine underpinning with other modifications that help your pontoon perform at peak efficiency, you may see a bigger speed increase than expected.

What Are the Benefits of Underskinning a Pontoon Boat?

Underskinning a pontoon boat involves adding a layer of material underneath the pontoons to create a smooth, streamlined surface. This can provide several benefits, including:

  1. Improved speed and fuel efficiency: Underskinning can reduce drag and resistance in the water, allowing the boat to move faster and use less fuel.
  2. Better handling and stability: By smoothing out the bottom of the pontoons, underskinning can improve the boat’s handling and stability, making it easier to maneuver and reducing the risk of capsizing.
  3. Protection from debris: Adding an underskin can protect the pontoons from damage caused by debris in the water, such as rocks and logs, which can extend the life of the boat.
  4. Enhanced aesthetics: Underskinning can give a pontoon boat a sleek, modern look that can enhance its overall appearance.
  5. Increased resale value: Adding an underskin can be an attractive selling point for buyers, and can potentially increase the resale value of the boat.

Overall, underskinning a pontoon boat can improve its performance, appearance, and durability, making it a worthwhile investment for many boat owners.

How Much Does Underskinning a Pontoon Boat Cost?

The cost of Pontoon underskinning a pontoon boat can vary depending on several factors, including the size and type of boat, the materials used, and the complexity of the job. Generally, the cost can range from a few thousand dollars to tens of thousands of dollars.

One of the main factors that can affect the cost is the type of material used for the underskinning. Aluminum and fiberglass are commonly used materials, with aluminum typically being less expensive but not as durable as fiberglass.

Another factor is the level of customization involved in the job, such as adding special features like lighting or a sound system.

It’s important to get a quote from a reputable professional who specializes in underskinning pontoon boats to get an accurate estimate of the cost. Factors such as the condition of the boat and the amount of work required to prepare it for underskinning can also impact the final cost.

Can You Underskin Your Pontoon Boat Yourself?

Underskinning a pontoon boat is a complex and involved process that requires specialized knowledge and equipment.

While it may be possible for experienced boat owners to tackle the job themselves, it’s generally not recommended unless you have extensive knowledge and experience with boat construction and repair.

Underskinning involves removing the pontoons from the boat, cleaning and preparing the surfaces, and installing the new underskin material.

It’s important to ensure that the new underskin is installed correctly and securely to avoid any safety issues or damage to the boat. In addition, any mistakes made during the installation process could be costly to fix.

It’s highly recommended to hire a professional who has experience with underskinning pontoon boats to ensure the job is done correctly and safely.

A professional will have the necessary tools, equipment, and knowledge to get the job done efficiently and effectively while minimizing the risk of damage to the boat.


Hi, My name is Steve. Boating is my hobby :). Bought and sold many bots during the last 15 years. You can find the most current and old boat sales here. I am working hard to find the best gift ideas, to analyze the latest gadgets and accessories, and to provide reviews and recommendations to improve your boating experience. I hope you enjoy my site.

Leave a Reply

Your email address will not be published. Required fields are marked *

Recent Posts