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Roof Insulation

Welcome to our in-depth exploration of blown roof insulation, a powerful and efficient solution to enhance the comfort and energy efficiency of your home.


What is Blown Roof Insulation?

Blown roof insulation, also known as blown-in or loose-fill insulation, is a type of insulation that’s literally blown or sprayed into the attic or roof space using specialised equipment. The insulation material is typically made up of small particles of fibrous materials like fiberglass, cellulose, or mineral wool.

The key advantage of blown roof insulation is its ability to fill in all corners, crevices, and gaps, providing a uniform and comprehensive coverage, unlike traditional batt or roll insulation. It creates a protective blanket over the entire roof area, significantly reducing heat loss during colder months and keeping the home cooler during the warmer months.

Blown roof insulation is also versatile enough to add to existing insulation, making it an ideal choice for improving energy efficiency in older homes. It can be a cost-effective solution, especially in attics and roofs with irregular joist spacing, lots of obstructions, or where higher insulation levels are desired. Plus, depending on the materials used, it can have additional benefits such as fire resistance, soundproofing, and being environmentally friendly.

The advantages of blown roof insulation for skillion roofs or tight ceilings.

Blown insulation shines when it comes to insulating tight roof spaces or skillion roofs due to its unique form and application method. Here are a few reasons why it’s an excellent choice for such situations:

1. Blown insulation provides excellent coverage

Blown insulation consists of small, loose particles that are literally blown into the desired spaces. This allows the insulation to reach and fill tight corners, crevices, and hard-to-reach areas that traditional insulation materials might struggle to cover. It can create a uniform layer of insulation even in irregularly shaped or narrow spaces, providing full coverage and minimising potential for heat transfer.

2. Blown insulation is quick and easy to install

The application process of blown insulation is typically quicker and more efficient than other methods. This is particularly beneficial for skillion roofs, which can be difficult to navigate due to their steep pitch. The blown-in application reduces the time and physical effort required to insulate these types of roofs.

3. Effective at upgrading existing insulation

Blown insulation can easily be added on top of existing insulation. This is advantageous for older homes or buildings that may already have some insulation in place but need an upgrade or additional insulation to enhance energy efficiency.

4. Good at insulating tight roof spaces

Skillion roofs often have less space between the roof and ceiling compared to conventional roofs. The flexibility of blown insulation allows it to fit snugly within these limited spaces without compromising its insulating performance.

Why does blown insulation provide better thermal performance than traditional insulation products?

Blown roof insulation often provides superior thermal R-values—the measure of thermal resistance—compared to traditional types of insulation products for several reasons.

Firstly, Blown insulation has the ability to fill every nook and cranny, crevice, and corner of an attic or roof space. It covers the entire area uniformly, including hard-to-reach spots, providing a comprehensive thermal barrier. This level of coverage reduces heat transfer more effectively than traditional insulation products that might leave gaps or have inconsistent thickness.

Furthermore, The small, loose particles of blown insulation can settle in a way that seals off small air leaks and gaps, further enhancing its thermal performance. Traditional insulation materials, such as batts or rolls, may not fully seal off these gaps, allowing more heat transfer.

Another reason why Kiwi’s using blown insulation over other types of products include it’s adaptability. Unlike traditional batt or roll insulation that comes in pre-cut widths and lengths, blown insulation can be adjusted to any space configuration, ensuring maximum insulating capacity. It’s particularly effective in attics and roofs with irregular joist spacing, obstructions, or varying depths, which would be challenging for traditional insulation products to efficiently cover.

Finally, depending on the material used, blown insulation can be installed at higher densities than traditional types of insulation, providing better resistance to heat flow (higher R-values).


Safe-R Installer Blowing Loose-fill Insulation into roof space

Advantages of Blown Roof Insulation

  • Creates wam and healthy homes
  • Can be installed without the need to remove linings

  • Provides high thermal performance

  • Reduces noise transfer from inside and outside the home.

  • Helps reduce your home’s energy useage


Need some help?

If you’ve got questions about blown wall insulation products we would be happy to chat. Drop us an email at sales@saferinsulation.co.nz or call us on 0800 267 992 for a conversation.