About Insulation

Polyurethane foam insulation stands out because it provides superior energy efficiency by combining high thermal resistance with an airtight seal. It fills every crack and gap, preventing drafts and moisture problems while maintaining its effectiveness for decades without sagging or settling. It’s versatility allows it to be used in almost any application, saving space and reducing energy costs. For a durable, efficient, and long-lasting insulation solution, polyurethane foam is unmatched.

Polyurethane foam seals cavities really well, which is great for reducing unwanted pollens, pollution and allergens from getting inside. To keep our sealed area from getting stale we advise complimenting foam insulation with a heat recovery ventilation(air replacement system) or an energy recovery ventilation( air and humidity replacement system). These systems provide fresh conditioned air replacement in the building so you never have to be concerned about moisture, mold or airing out the house through opening windows and doors.

Spray foam insulation doesn’t create moisture problems; it helps prevent them by addressing one of the main causes of moisture: condensation. Condensation happens when warm, humid air comes into contact with a cold surface, like an uninsulated wall or ceiling. The temperature difference causes moisture in the air to turn into water droplets, which can lead to dampness, mold, or rot over time. Think of how an ice-cold glass of water in a warm room gets covered in condensation, while a room-temperature glass stays dry.

Spray foam works by creating a barrier that stops air from moving between warm and cold areas. Closed-cell foam, in particular, doubles as a vapor barrier, preventing moisture from passing through. This keeps warm air from reaching cold surfaces, eliminating the conditions needed for condensation to form. By sealing gaps, cracks, and leaks, spray foam helps keep your home dry, comfortable, and energy-efficient.

You can never have too much insulation, but you can have a lack of ventilation. Over-insulation only becomes a concern when proper ventilation isn’t provided. Ventilation is essential for maintaining healthy air quality and preventing moisture build-up. A ventilation technician plays a crucial role in achieving the right balance by calculating the required air replacement rate based on factors like the size of the space, the number of occupants, and insulation levels.

When spray foam insulation is installed, it seals the building tightly, significantly enhancing energy efficiency but also restricting natural airflow. Without a proper ventilation system, this can lead to issues such as trapped moisture, poor indoor air quality, and discomfort. That’s why a well-designed ventilation system—often including mechanical ventilation or heat recovery units—is vital. Insulation and ventilation work hand-in-hand to create a comfortable, healthy, and energy-efficient indoor environment.

No, foam doesn’t sag, settle, or lose its effectiveness over time. Foam will last the lifetime of the building(approx 80 – 100 years).

Closed-cell spray foam performs exceptionally well in a fire, charring on the surface to slow flame spread and creating a protective barrier that has even been credited with saving the timber structure of homes by reducing heat transfer. Its airtight seal also prevents oxygen from fueling the fire. Open-cell foam, while less dense, still slows flame spread and seals gaps to limit airflow that could feed a fire. When both are installed with a thermal barrier, like drywall, they meet fire safety codes and provide effective insulation with added fire resistance.

The thickness of spray foam needed depends on the building component and the required R-values for your region in New Zealand. Below are the recommended thicknesses for both closed-cell and open-cell spray foam insulation:

Closed-Cell Spray Foam

With an R-value of 1.1 per 25mm:

• Roof/Ceiling: 150mm (R 6.6)
• Walls: 46mm (R 2.0)
• Floors: 30mm (R 1.3)

More information on Closed Cell Spray Foam

Open-Cell Spray Foam

With an R-value of 0.78 per 25mm:

• Roof/Ceiling: 210mm (R 6.6)
• Walls: 65mm (R 2.0)
• Floors: 45mm (R 1.3) * Internal only

These calculations meet the updated NZ standards as of May 2023. For more details, refer to the H1 Building Code. Always consult a professional installer to ensure compliance with local building codes and specific project requirements.

Open-cell foam is an excellent choice for those seeking superior insulation properties, acoustic dampening, and effective air sealing, especially for interior areas such as walls and ceilings. It’s also ideal for budget-conscious projects without compromising on quality. 

Closed-cell foam is a versatile option that can be applied directly to metal, timber, or concrete surfaces. With its outstanding insulation properties, it creates a vapor barrier when applied at a thickness of over 38mm. Closed-cell foam is suitable for a variety of applications, including residential, commercial, vehicles, and marine environments, and works well for both internal and external use.

Yes, spray foam is one of the most eco-friendly insulation options available today.

We use advanced Huntsman HFO closed-cell foam and Agribalance open-cell foam, which features low global warming potential technology, helping reduce environmental impact right from the start. Unlike other insulations, spray foam is manufactured on-site, eliminating packaging waste and unnecessary freight which is a major contributor to carbon emissions in construction.

The products we use are composed of a total of up to 19% recycled and renewable content.

Once cured, the foam becomes chemically inert and safe, with no ongoing off-gassing, fibres, or breakdown often lasting 80–100 years without degrading.

Our team uses protective suits and ventilates the area during installation to ensure best practice and safety – just like any high-performance material requires. The result is a long-lasting, energy-saving, environmentally conscious solution that outperforms conventional insulation on nearly every front.