Ethan Clarke
Insulating a van is a complex process that requires careful consideration of various factors. The goal of insulation is to prevent heat loss, which occurs due to heat transfer through conduction, radiation, and convection. While there is no one-size-fits-all solution, several options are available, such as recycled plastic insulation, fibreglass, and spray foam. Recycled plastic, made from plastic bottles, is a popular choice due to its sustainability, ease of handling, and ability to prevent mould growth. However, some people express concerns about its effectiveness in insulation. To enhance insulation, additional measures such as covering windows with Polyiso or using a vapour barrier are implemented. Ultimately, the choice of insulation depends on personal preferences, budget, and intended use.
| Characteristics | Values |
|---|---|
| Purpose | To combat heat loss |
| Heat loss | Heat transfer (heat flow) from warm to cool |
| Heat transfer mechanisms | Conduction, Radiation, Convection |
| Conduction | Heat transfer through a material |
| Spray foam | Safe once VOCs have evaporated; acts as a vapour barrier |
| Wool | Wicks moisture; no mould or mildew; works when wet; sustainable |
| Recycled plastic | Popular thermal insulation; safe, non-irritant, sustainable, good value for money; allows water vapour to pass through |
| Polyiso board | Second most popular insulation |
| Thinsulate | Keeps the van warm; no mould or bugs |
| Fibreglass | Least popular insulation; hard to handle, toxic |
| Reflectix | Radiative insulation; useful as a base layer; reflects heat |
| Polyiso | Acts as a thermal barrier |
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What You'll Learn
Recycled plastic is a popular and sustainable choice
The choice of insulation material for a van conversion is a complex one, with many factors to consider. The goal of insulation is to combat heat loss, which occurs through conduction, radiation, and convection. There are various materials available for van conversion insulation, each with its own advantages and disadvantages. One popular and sustainable choice is recycled plastic insulation.
In a Roaming Home study, recycled plastic was found to be the most popular batt insulation, used in 41% of vans, followed by polyiso board at 21%. Recycled plastic insulation is made from polyester fibres that are thermally strengthened at high temperatures, typically around 170°C. This process ensures the material is breathable, dimensionally stable, and emission-free. Recycled plastic insulation is also pest-resistant, non-flammable, and resistant to aging, making it a durable and safe option for van conversions.
The production of recycled plastic insulation is more environmentally friendly than traditional insulation materials. It is made from 100% recycled material, often from PET bottles, reducing waste and the need for chemical or organic binding agents. The energy consumption during production is lower than that of conventional insulation, positively impacting its environmental footprint. Additionally, recycled plastic insulation is usually cheaper than traditional options, making it a cost-effective choice for van conversions.
While recycled plastic insulation offers many benefits, it is important to consider its limitations. One concern is the potential for incorrect installation, as covering up the insulation and restricting air circulation can lead to moisture issues. Proper ventilation is crucial to prevent mould and mildew. Therefore, understanding how to use any type of insulation correctly is essential.
Another popular sustainable option for van conversion insulation is Hempitecture HempWool, made from 90% natural hemp fibre. HempWool is safe to handle, free from volatile organic compounds (VOCs) and toxins, and maintains the van's temperature effectively throughout the year. It is worth considering various options and their advantages and disadvantages before deciding on the best insulation material for a van conversion.
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Thinsulate is a good insulator with no mould or bugs
Insulating a van is a complex process, and there is no one-size-fits-all solution. The goal of insulation is to combat heat loss, which occurs through conduction, radiation, and convection. While some van dwellers have used plastic bags to insulate their vehicles, this method has its drawbacks, as plastic is a good heat conductor and therefore a poor insulator.
Thinsulate is a popular insulation option for van conversions, and it has several advantages. Firstly, it is specifically designed for insulating vehicles, providing both thermal and acoustic insulation. The hydrophobic fibres of Thinsulate resist moisture, mould, and mildew, addressing a common issue with other insulation materials. This feature is particularly important for preventing mould and mildew growth in the confined space of a van.
Thinsulate is also lightweight, making it ideal for vehicles where weight is a concern. It comes in 60-inch-wide rolls, and users can cut it to shape with sharp fabric scissors. The installation process is relatively straightforward, and some people have reported insulating their entire van in a single day. Thinsulate can be pulled into cavities and structural elements using a fish tape or wire, and it is recommended to install it compressed and let it expand afterward.
In addition to its insulating properties, Thinsulate helps to "dampen" the vibration of the sheet metal in a van, reducing road noise and creating a quieter interior space. This dual functionality can save time, money, and weight during the conversion process.
While Thinsulate is a good insulator, it is often combined with other materials for optimal performance. For example, it can be used with Low-E or EZ-Cool and insulated window covers to regulate temperature more effectively. Some van dwellers have also paired Thinsulate with wood panelling for added insulation and a more comfortable interior temperature.
Overall, Thinsulate is a viable option for van insulation, offering warmth, mould resistance, and acoustic benefits. However, it is important to consider the specific needs of your van build and combine different materials strategically to create an effective insulation system.
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Spray foam is a powerful insulator and vapour barrier
Closed-cell spray foam can create a vapour barrier, but open-cell spray foam cannot. The tight cell structure and rigid composition of closed-cell spray foam prevent vapour from permeating at approximately 1.5 inches in depth. This type of foam is ideal for buildings in cold climates as it prevents the humidity in the warm inside air from entering the colder wall assembly and condensing. Conversely, in warm climates, closed-cell spray foam prevents condensation from forming in a wall assembly as warm outside air meets the cold wall assembly.
Spray foam is also an effective insulator, ensuring that surfaces remain warm in cold seasons and vice versa. Additionally, it serves as a robust air sealer, preventing air leaks that can carry humidity and cause vapour transport. Its ability to regulate temperature and control moisture makes it a popular choice for van conversions, with 16% of conversions in the Roaming Home study opting for this insulation method.
However, it is important to note that spray foam may not be suitable for all situations. For instance, if there is already a leak in the van's structure, spray foam could slow down drying and exacerbate the problem. Therefore, it is crucial to have a thorough understanding of the van's walls, including materials, thicknesses, conditions, and history of leaks, before deciding on an insulation method.
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Wool wicks moisture but needs to be installed correctly
There is no one-size-fits-all solution for van insulation, and the best approach depends on various factors, including cost, effectiveness, and environmental impact. While recycled plastic is the most popular choice for van insulation, other options, such as wool, are also worth considering.
Wool is a natural insulator that effectively manages moisture. Its fibres absorb and wick away moisture, keeping the skin or the surface dry. This property makes wool ideal for sportswear and outdoor use, as it provides warmth while managing moisture. However, when using wool for van insulation, it is crucial to understand its behaviour and install it correctly.
Wool wicks moisture, and if it is not installed correctly, it can trap moisture between layers, leading to potential issues. To prevent this, wool insulation should be given a chance to breathe. This means avoiding covering it up or restricting air circulation. Creating an airspace between the metal wall of the van and the wool insulation allows air currents to evaporate the moisture, preventing it from becoming trapped.
Additionally, combining wool with ventilation is an effective strategy for moisture management. For example, driving with the windows down can help dry out the van's interior. Understanding the properties of wool and ensuring proper installation are critical to utilising its benefits effectively.
While wool has advantages, it is essential to consider other insulation options and their characteristics. For instance, Thinsulate is a popular choice for van conversions due to its effectiveness in maintaining warmth and preventing mould and bugs. Spray foam insulation is another option that acts as a vapour barrier and provides structural support.
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Polyiso foam is a good insulator for windows
Polyiso foam is a popular insulation choice for commercial roofing and wall assemblies. It is made from polyisocyanurate, a rigid foam insulation used in more than 70% of commercial flat or low-slope roof constructions. Polyiso has a high R-value per inch, indicating superior thermal resistance and energy efficiency. This makes it ideal for reducing energy consumption and improving the longevity of roofs and walls.
Polyiso is also a cost-effective option, minimizing space, material, and labor requirements. It performs well in fire tests and is stable over a wide temperature range, making it suitable for various climates. Its closed-cell structure provides high compressive strength and excellent thermal properties, making it an effective barrier against heat transfer and helping to reduce heating and cooling costs.
In addition to its insulating properties, polyiso foam is lightweight and easy to handle, making it convenient for van conversions. It is also versatile and can be used with various attachment methods, including hot mopping and adhesive methods. Polyiso is a popular choice for van conversions, with 21% of vans in the Roaming Home study using polyiso board for insulation.
While polyiso foam offers many benefits, it is important to consider its limitations. Polyiso is more susceptible to moisture damage than other types of foam, so keeping it dry is essential. Additionally, it may have higher initial costs compared to other insulation materials. However, its long-term performance and energy-saving benefits can offset these initial expenses.
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Frequently asked questions
Recycled plastic is the most popular form of insulation for van conversions. It is made from recycled plastic bottles, is vegan-approved, and does not contain harmful chemicals. It is also safe and non-irritant, meaning it can be easily torn by hand and does not require PPE to be worn during installation.
It is important to not squish recycled plastic insulation as it needs air pockets to work effectively. It is also a time-consuming process to properly insulate a van using recycled plastic.
Some alternatives to using recycled plastic bags include fibreglass, Thinsulate, wool, spray foam, and foam board.
The first step is to remove everything from the van and take out the existing floor. The next step is to cover the driver's cabin with a plastic sheet to prevent fibreglass from getting on the seats.
The final step is to add a vapour barrier to seal everything. This will ensure that there is no airflow from the van to the fibreglass insulation.
