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What Are The Best Roof Insulation Options?

What Are The Best Roof Insulation Options?

Why Use Insulation in A Property?

Apart from being a building legislation requirement, insulating your property by adding insulation to your ceiling, walls, and under-flooring has plenty of benefits for your house or office but, in case you aren’t up to speed with the most important reasons to insulate a property, he team at Sydney Roof & Building Supplies are here to give you a run-down:

1.      Increased thermal efficiency

This is the most obvious benefit of installing insulation - you can maintain your desired temperature indoors. Property insulation must be of good quality and well-fitted, so you can enjoy the kind of climate that you want inside your home regardless of the season.

2.      Lower electricity and gas bills

When you insulate your home, there will be less need to run your air conditioners and heaters. This could mean lower gas and electricity bills – and more savings in your pocket.

3.      Soundproofing

One of the incredible advantages of insulation is its capability of soundproofing your home. That extra layer of insulation material keeps outside noise out and indoor chatter in.

4.      Efficient building process

If you install insulation while building your home, the project would be easier and faster to complete. Construction work can proceed uninterrupted because the insulation covers the interior of the building.

5.      Reduce your carbon footprint

Since you’ll be turning on your heating and cooling appliances less frequently, you will be better able to help the environment, because you will be more energy efficient with insulation, keeping your house warm or cool without spending as much energy. This means less power is required by your property, which in turn means less Carbon is created and therefore you are helping the planet heal.

Where Should You Install Insulation?

The objective of installing insulation is to seal your entire house from draughts. Therefore, it is best to fit the material in key areas where air seeps into your home – mainly through the ceiling, walls, and under the floors. Insulating your ceiling, walls and floors can dramatically reduce the need for expensive cooling and heating systems. You should install insulation in the following places:

  • Ceilings: Hot air rises, so heat tends to escape through your ceiling during winter, but good insulation can stop this from happening. Similarly in the summer, reflective insulation can prevent the sun’s rays from penetrating your house through the ceiling.
  • Walls: Modern homes now have wall insulation to create a more balanced indoor climate all year round. Insulation can be placed in between wooden wall batons, or in brick wall cavities.
  • Underfloors: Air can also escape through gaps your floor boards, floor coverings or just through thin material, so it’s crucial to have proper insulation that improves the thermal efficiency of your house.


Types of Roof Installation for Australian Homes

There are three types of insulation in Australian homes today:

  • Reflective insulation
  • Bulk insulation
  • Spray foam

Traditional bulk and reflective insulation are still the most common, but cellulose spray foam is fast catching up. Here is some more detailed information about each type: 

Bulk insulation: Trap heat in tiny bubbles

Readily available in hardware stores, bulk insulation is the most popular form of building insulation. It works by trapping air inside millions of tiny bubbles to prevent heat from entering the building, because air is generally less thermally conductive than solid materials. You can choose from a wide range of materials, available in rolls, boards and batts.

A disadvantage of bulk insulation, however, is that it cannot be compressed, because the air pockets will be compromised.

Reflective insulation: Bounce heat away

If you are looking for cost-efficient home insulation, then reflective insulation is your best option. Reflective insulation is made of a top foil layer backed by a sheet of plastic or paper, with the shiny surface deflecting heat away from your home.

For reflective insulation to work properly, the reflective foil must be installed facing down and should be kept clean at all times. Builders can combine bulk and reflective insulation to create hybrid configurations that ensure maximum insulating performance. 

Cellulose spray foam: The future of insulation

Relatively new to the world of insulation, spray foam can be very effective and offers insulation like no other material can. Its R-value is higher than traditional forms of insulation and it is highly resistant to moisture so it is less likely to sag over time.

Cellulose insulation is a form of bulk insulation that is seamless, durable, and environment-friendly. This insulation is applied by spraying or blowing into the ceiling, walls, or under the floor and the foam expands to form a thick layer of insulation. Cellulose insulation is perfect for hard-to-reach places that are difficult to seal with traditional insulation materials.

Cellulose insulation is fantastic for stopping heat transfer as it fills all gaps around the sprayed area, helping your home maintain its indoor ambient temperature all year round – so you save more money on heating and cooling.

Spray foam insulation is mostly made of pulverised recycled paper treated with boric acid and borax to make it fire and pest resistant and can also be combined with batts and foil to form a hybrid.

What Are The Types of Roof Insulation Material? 

Fibre Glass

Roof insulation is made from several different materials, with glass wool as the most common in homes and commercial buildings. Some glass wool roof insulation options include:

  • Knauf earth wool ceiling batts
  • Pink glass wool ceiling batts
  • Gold Bradford Hi-Performance ceiling batts
  • Black Bradford hypoallergenic ceiling batts


Polyester insulation is made from recycled PET plastics, bonded together by heat for a rigid, flexible and hypoallergenic structure. Polyester roof insulation options include:

  • Greenstuf polyester ceiling insulation
  • Bradford Polymax thermal ceiling batts


Foil insulation creates a reflective barrier against the sun’s rays. The R-value of reflective insulation will ultimately depend on how it is installed and what climate you have in your location. Foil roof insulation options include:

  • Kingspan Air-Cell Insulbreak 70
  • Sisalation Metal Roof Sarking


Hybrid options combining bulk and reflective roof insulation include:

  • Knauf earth wool blanket roll with foil facing
  • Fletcher Permastop blanket insulation

Should You Install Batts or Rolls in Your Roof?

Batts and rolls are both effective at sealing crevices in your home, but the main difference is how they are cut and installed. Insulation rolls can be rolled out in large ceiling spaces that have few obstacles. Meanwhile, batts are easier to install in small ceiling spaces since they are pre-cut to fit any space.

How to Choose the Best Insulation

Choosing the best insulation for your home will depend on factors such as roof type, thermal resistance required, climate and budget. Some insulation types are not suitable for damp places while some materials are designed to work as a moisture barrier. Make sure that the insulation you choose is suitable for your ceiling, walls or underfloor.

Here at Sydney Roof & Building Supplies, we stock many different types of insulation panels to suit your property design and construction. Our roof insulation materials combine an insulating core with a radiant barrier that protects your interiors from excessive heat transfer.

If you are installing or upgrading your home or building’s insulation, talk to our friendly and knowledgeable roofing team today by visiting us at, by calling us on 02 8090 3483, or alternatively you can email Mark or Marie by clicking on their names here.

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The Importance of Insulating Your Roof

The Importance of Insulating Your Roof

Proper insulation can significantly impact your comfort, as well as the energy efficiency of your house. Australia has an extreme range of climates, and your residence should be prepared for scorching days as well as freezing ones.

During cold months, heat can be lost through your ceiling, and during the summer season, heat can penetrate your home through the roof. That’s why aside from insulating your floors and walls, you must also insulate your roof.

Types of Roof Insulation

There are different types of roof insulation for you to choose from. Your choice will depend on the type of roof that you have, the insulation that you need, and your budget too. Each comes with its own sets of benefits and drawbacks, so it’s vital to understand them before you decide.

·  Spray Foam Roof Insulation

Polyurethane spray foam, aside from helping you reduce a maximum of 20% off your energy bill, can also lower your carbon footprint. This type of insulation is applied directly to the slates of your roof, tiles, or roofing felt.

Spray foam roof insulation helps extend the life of your roof, provides acoustic insulation, and helps prevent pests from entering your loft space. This type of insulation, however, should be installed by a contractor.

·  Rigid Insulation Boards

If you are using your loft as an extra bedroom or as an attic, then you can use rigid roof boards for your insulation. These boards are placed between your roof rafters and are then covered with insulation plasterboards for a cleaner finish. The walls of your loft must also be insulated in the same way. Just make sure to keep the loft well-ventilated.

The use of rigid insulation boards with insulation plasterboards can be more costly than other types of roof and loft insulation.

·  Blanket Insulation

This type of insulation comes in rolls of foiled-backed felt or mineral fibre. One of the main benefits of blanket insulation is that you can apply it on your own. Of course, if you are not confident, you can always call a professional roof insulation installer.

·  Loose-Fill Insulation

Loose-fill insulation that is blown and installed in the gaps between your roof joists is the perfect choice for lofts that are not easy to access. Your professional roofer will use special equipment to blow loose and fire-retardant insulation materials. The loose insulation materials may be cellulose fibre, cork granules, mineral rock wool, or recycled newspapers.

·  Structural Insulated Panels

These refer to prefabricated panels that you can use to insulate your roofs. They provide better insulation than other insulation methods. Although you can add some insulation to existing structures, these panels are preferrable for new structures.

Benefits of Roof Insulation

Here are some benefits of insulating the roof of your home.

·  It makes your house more comfortable.

Your comfort is fundamental. Your home is a place of rest and relaxation, and the quality of your rest will depend on the comfort of your house. Your resident is a place that provides you with protection against extreme weather conditions. However, if your home is too cold or too hot, you sacrifice the quality of your sleep and rest.

Roof insulation can perform either heat retention or heat prevention. During the cold months, efficient roof insulation keeps the heat from escaping through the roof, keeping the interiors of your home cosy and warm.

During summer months, you want your roof insulation to do the opposite. Excess heat entering your home can make your home feel like a blistering oven, especially when the temperatures are soaring high.

If you want your home to be a comfortable haven, ensure that is well-insulated from the heat and cold.

·  It makes your home more efficient.

Efficient roof insulation keeps the temperature in your home more stable. This puts less work on your heating and cooling devices, allowing you to save on your utility bills. The initial cost of installing insulation can soon be rewarded with savings on your power bills. Some types of roof insulation materials can help you save up to 20% off your usual energy bills.

·  It helps extend the life of your roof.

Some roof insulation materials can help extend the lifespan of your roof and help reduce the need for roof maintenance. Spray foam, for instance, gives you a more stable roof. Roof insulation reduces the temperature within the structure during summer and keeps it dry and moisture-free as well. Consequently, this reduces the risks of moulds and mildew, which can affect the integrity of your roof.

Extreme temperature changes can slowly take its toll on your roof. A poorly insulated roof will be more susceptible to damage and you will end up with more costly repairs and replacements.

·  It helps make your home more sustainable.

Your house can be made more sustainable with proper insulation and ventilation. It will not be too dependent on heating and cooling equipment. Not only does this help you save on energy bills, but this also helps reduce pollution and carbon footprint. It’s the first step that you can take for a greener home and lifestyle.

·  It makes your attic liveable and more comfortable.

Without proper roof insulation, your attic will be unbearably hot or cold. With insulation in place, your attic becomes a more comfortable space that you can use. Instead of just a storage space, you can even convert it into an additional bedroom that you can still use for the children or your guests. It’s an efficient use of space that big families will appreciate.

Visit Sydney Roof and Building Supplies for your roofing needs in Sydney.

Sydney Roof and Building Supplies is your one-stop-shop for all your roofing needs in Sydney and the Central Coast. We offer a wide range of roofing products, from paint, flashing, roof tiles, scaffoldings, to your insulation. In case you cannot visit us, give us a call and we can deliver your purchases right at your footsteps.

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