Upgrade your walls with Fletcher's Pink Batts R4.0. Premium wall insulation batts delivering superior thermal and acoustic performance for Melbourne homes. Available now at Melbourne Insulation Online, Melbourne's local insulation experts.

For Melbourne builders and homeowners looking to go beyond the minimum and build a home that's genuinely comfortable year-round, R4.0 wall insulation is a fantasticx upgrade. Whether you're framing a new build or retrofitting an existing home, Pink Batts R4.0 fit neatly into standard wall cavities and deliver superior thermal and acoustic performance. 

As with all pink-batts, they friction fit into place without the need for strapping into place, while preserving your coverage. 

Why R4.0 for Walls? In Melbourne's Climate Zone 6, the NCC minimum for wall insulation is R2.0 — but minimum compliance rarely means maximum comfort. R4.0 wall batts are increasingly specified by energy assessors, architects, and NatHERS consultants as the go-to upgrade for homeowners and builders serious about energy efficiency, lower power bills, and achieving higher star ratings without a major cost blow-out.

Thicker walls, better performance. It's that simple.

Why Fletcher's Pink Batts?

✅ Made right here in Melbourne from glasswool; safe, non-combustible & long-lasting with a lifetime warranty

✅ Itch-free formula for a more comfortable installation

✅ Firm Fit for a faster and better coverage installation

✅ Pre-cut to fit standard 90mm and 70mm timber and steel stud wall frames

✅ Outstanding acoustic performance -  The R4.0 significantly reduces noise transfer between rooms and from outside

✅ Resistant to mould, rot, and vermin

✅ NatHERS & CodeMark certified for full NCC compliance

Who is R4.0 Wall Insulation For? R4.0 wall batts are the preferred choice for:

• New residential builds in Melbourne targeting a 7-star NatHERS rating or above
• Renovation and retrofit projects replacing underperforming or missing wall insulation
• Multi-residential developments - townhouses, duplexes, and apartments requiring strong thermal and acoustic separation between tenancies
• Acoustic upgrade projects - home theatres, music rooms, bedrooms and bathrooms, and open-plan living areas where noise control matters
• Energy efficiency upgrades in existing Melbourne homes looking to reduce heating and cooling costs

The Acoustic Advantage One of the standout benefits of R4.0 wall batts is their acoustic performance. The increased density compared to lower R-value products means significantly better sound dampening between rooms — making them a popular choice not just for thermal performance but for noise reduction in bedrooms, bathrooms, home offices, and shared walls in multi-residential builds.

Shop Local with Melbourne Insulation Online -  Based right here in Melbourne, MIO stocks Fletcher's Pink Batts R4.0 wall insulation ready for same-day pickup or fast local delivery across metro Melbourne and regional Victoria.

Our team understands wall framing specifications, NCC compliance, and NatHERS requirements, so you get the right product for your job, every time. Simply submit your Energy Report and Plans and we can specify everything up for you.

Better walls. Quieter rooms. Lower bills. Shop R4.0 Wall Insulation at MIO today.