At The Fit Out Pontoon, we offer professional sprayfoam insulation services for canal boats, including narrowboats and widebeams. Whether you’re building new or refitting an older boat, proper insulation is critical to maintaining comfort onboard. Our service specialises in using polyurethane (PU) spray foam—the leading choice for boat insulation today. Not only does it keep you warm in the winter and cool in the summer, but it also tackles condensation issues, which can wreak havoc on your boat’s interior.

Let’s dive into why PU spray foam insulation is the superior choice for your canal boat and how our service can make your boat the most comfortable it’s ever been.

Spray foam is a game-changer for boat insulation. It starts as a liquid, and as soon as it’s applied to your boat’s steel hull, it expands to cover the surface and fills voids. Highly effective in creating a continuous layer of insulation and overall, it helps keep out cold spots and condensation issues.

The benefits at a glance:

• Bonds directly to steel: PU spray foam adheres tightly to the steel hull, creating a seamless bond. This is crucial for eliminating air gaps that cause condensation and cold bridging, which can lead to moisture buildup and rust over time. By bonding directly, it forms a tight seal that prevents moisture from getting between the insulation and the steel, significantly reducing the risk of corrosion in your boat.
• Condensation-proof: The foam bonds directly to the hull, meaning fewer air gaps and less cold steel sweating inside your boat.
• Temperature regulation: Whether it’s freezing outside or you’re baking in the summer sun, PU foam keeps things cosy by reducing both heat loss and heat gain.
• Vibration dampening: This foam does double-duty by cutting down engine noise and vibrations, which can be especially handy when you’re moored up next to chatty neighbours.
• Water resistance: Its closed-cell structure means it’s not just waterproof but will also outlive your boat in most cases!

U-Values—these measure how well a material stops heat from passing through it, expressed in units of W/m²K. Simply put, a lower U-value means better insulation, as it blocks heat from moving from a warm space to a cooler one (or vice versa). The lower the number, the better your boat is at keeping you toasty in the winter and cool in the summer. So, when it comes to insulation, low U-values are your best friend.

And here’s where PU spray foam really shines. It has one of the lowest U-values around, making it fantastic at keeping heat exactly where you want it. To put things in perspective, you’d need about three times the thickness of Rockwool to match the thermal performance of spray foam. On a boat, where space is a premium, PU foam lets you maximise your living area while ensuring top-notch insulation.

For those curious about the details: A typical narrowboat insulation job uses between 25mm to 30mm of PU foam. That may seem like a slim layer, but trust us—it’s more than enough to keep your boat cosy and dry all year long.

We’re not just insulation experts, we’re boat builders and boat lovers too. We know the quirks of fitting insulation on steel boats, and we’ve got years of experience spraying foam into the tightest corners we can safely reach. Whether you’re fitting out a new sailaway or refitting an older narrowboat, we’ve got you covered.

Thinking about spray foam insulation for your canal boat? We make it easy. Use our quick quote calculator to see how much your insulation will cost. Just input your boat’s details, and you’ll get an instant, no-fuss estimate. Or, if you’d prefer a chat, reach out to us on 0115 727 0165, and we’ll guide you through the process. We’re here to help turn your canal boat into the cosy, insulated haven you deserve.

At The Fit Out Pontoon, we don’t just stop at canal boats. Our expertise extends to a wide range of vessels and applications, offering versatile spray foam insulation services for Dutch barges, workshops, campervans, containers, and even buildings. Whether you’re looking to make your boat more comfortable or insulate an alternative project, we’re ready to help.