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What You Need to Know About R2.5 Batts for Wall Insulation
Posted April 2025

R2.5 Batts for Wall are a top choice for thermal and acoustic insulation in Victorian homes. These wall batts fit well into standard 90mm wall frames, making them ideal for both new builds and renovations. They offer strong thermal resistance to help reduce energy bills and provide excellent noise control.
What Does R2.5 Actually Mean?
R2.5 refers to the insulation’s R-Value, which measures how well it resists heat flow. The higher the R-Value, the better the insulation performs. For walls in Victoria, R2.5 Wall Batts are a popular choice because they strike a good balance between thermal performance and affordability.
R2.5 Batts for Wall Insulation are ideal for standard 90mm timber-framed walls. They provide year-round comfort by keeping warm air inside during winter and blocking heat in summer. If you’re looking to improve energy efficiency without increasing wall thickness, R2.5 is a smart choice.
If you are a builder, renovator, or homeowner, R2.5 insulation for walls is a great choice. It provides reliable insulation that makes your home more comfortable and helps save energy. In this guide, we explain why we prefer Fletcher’s Pink Batts, compare leading brands, and show how proper installation makes a difference.
Why Choose R2.5 Batts for Wall Insulation?
1️⃣ Great Fit for Victorian Homes – R2.5 batts are designed to fit standard wall cavities without modification.
2️⃣ Better Energy Efficiency – Reduces heat loss in winter and keeps homes cooler in summer.
3️⃣ Noise Reduction – Helps block sound between rooms and from outside.
4️⃣ Long-Term Savings – Cuts your energy bill and improves your home’s value over time.
5️⃣ Simple Compliance – While not required by code, R2.5 batts help meet energy efficiency targets.
How R2.5 Insulation Improves Thermal Performance?
Homes with R2.5 wall insulation can reduce heat flow by up to 25%, lowering heating and cooling bills by up to 30%.
- Keeps rooms at a more stable indoor temperature
- Improves the building envelope and reduces air leaks
- Helps cut greenhouse gas emissions by lowering energy use
Acoustic Benefits of R2.5 Wall Batts
R2.5 batts also deliver solid acoustic performance:
- Reduce outside noise in busy locations
- Add privacy between rooms like bedrooms and bathrooms
- Best results when installed tightly without gaps
R2.5 Insulation Sizes and Coverage

Why We Recommend Fletcher’s Pink Batts
We prefer Fletcher’s Pink Batts over other brands for wall insulation because:
- Made in Australia for local weather
- High-density batts for better performance
- Made with up to 80% recycled glass
- Easy to install, safe, and long-lasting
Other good brands include Bradford Gold, CSR Martini, and Knauf Earthwool, but Pink Batts remain our top choice.
Why Professional Installation Matters
Correctly installing R2.5 wall insulation ensures:
- Batts fit tight in wall cavities with no gaps
- Thermal and acoustic performance is maximised
- Wall batts stay in place and retain their R-value over time
While you can do it yourself, hiring a professional helps you get the best from your insulation. It also makes sure your home meets energy standards.
DIY vs Professional Install – What You Need to Know
Many homeowners consider installing R2.5 wall batts themselves to save on costs. While DIY can be an option, it’s important to understand the risks. Improper installation—like gaps, compression, or loose batts—can reduce the R-Value by up to 50%.
Professional insulation installers ensure every batt fits snugly and complies with Australian standards. They also help you select the right R2.5 Batts for Wall Insulation that matches your home’s unique needs.
If you’re building or renovating in Victoria, professional installation ensures your insulation contributes to long-term energy savings and meets compliance requirements.
How to Choose the Right Wall Insulation for Your Project
Choosing the right wall insulation depends on your wall type, climate, and budget. R2.5 Wall Batts are ideal for Melbourne and regional Victoria due to their balance of cost, thickness, and performance.
For colder regions or high-performance homes, you might consider higher R-Values like R2.7 or R2.8—though these may require deeper wall frames.

Pink Batts – Wall Insulation R2.5
Why Choose R2.5 High Density Pink Batts for Acoustic Wall Insulation?
Pink Batts® insulation is made with a next-generation formula, offering a softer texture for easier and more comfortable handling.
At Climate Control Insulation, we help homeowners choose the best R2.5 batts for wall installations based on layout, orientation, and design. Contact us for personalised advice.
R2.5 wall batts are a great insulation product for energy-efficient and comfortable homes in Victoria. They’re easy to install, improve thermal and acoustic insulation, and help reduce your energy bill over time.
Environmental Benefits of Insulating with R2.5 Wall Batts
R2.5 Batts for Wall Insulation don’t just improve comfort—they also support a more sustainable home. Brands like Fletcher’s Pink Batts are made from recycled glass and manufactured in Australia, reducing your carbon footprint.
By improving energy efficiency, R2.5 wall insulation can lower your household’s greenhouse gas emissions. Over time, this reduces reliance on artificial heating and cooling systems, making your home more eco-friendly and cost-effective.