Confused about R-values, Earthwool batts, or which insulation is best for your home or shed? This complete guide covers everything from R2.0 to R7.0 and helps you shop insulation online in Perth

When it comes to insulating your home, shed, or commercial space, understanding R-values and product types is key. Whether you're looking for Earthwool batts, ceiling insulation, or underfloor solutions, this guide breaks down the most popular options — from R2.0 insulation all the way up to R7.0.

Plus, if you’re searching for insulation supplies near me or the best roof insulation in Perth, you’re in the right place. At Perth Insulation Centre, we stock the full range of Earthwool insulation for every need.

What Is an R-Value?

The R-value measures how well insulation resists heat flow — the higher the number, the better the thermal performance. Perth's warm summers and cool winters demand smart insulation choices, especially in ceilings, walls, and underfloors.

Here's how to choose the right R-value for your space:

• R2.0–R2.5 Insulation: Commonly used for underfloor insulation and internal walls.
• R3.5–R4.0 Insulation: Ideal for external walls and ceilings in mild climates.
• R5.0–R6.0 Insulation: A strong performer for roof spaces in Perth homes.
• R7.0 Insulation: Best for homes seeking maximum energy savings and temperature control.

Best Earthwool Products by Application

Ceiling Insulation

• Earthwool R4.0 Ceiling Batts – Reliable and cost-effective.
• Earthwool R5.0 – A step up in thermal performance.
• Earthwool R7.0 – The ultimate ceiling insulation in WA.

Wall Insulation

• Earthwool R2.0 – A solid performer for internal walls.
• Earthwool R2.5 HD – High-density option for thermal and acoustic performance.
• Earthwool R2.7 HD – Popular choice for double brick and framed homes.

Underfloor Insulation

• Earthwool R2.5 Floorshield – Insulates timber floors and reduces drafts.

Acoustic & Specialty Insulation

• Earthwool Acoustic Batts – Designed for soundproofing internal walls or multi-res zones.
• Ametalin SilverWrap Micro – Great as a vapour barrier or shed wall lining.

Popular R-Value Searches: Explained

• Is R4 insulation good? – Yes. R4.0 batts offer excellent performance for Perth ceilings.
• Is R5 insulation worth it? – Absolutely. Great for roofs exposed to full sun.
• What is R6 insulation for? – Ideal for high-performance ceiling insulation in homes where comfort is a priority.
• R2 wall insulation? – Good for interior walls. Consider R2.5 or R2.7 for exterior wall performance.

Why Choose Earthwool?

Earthwool insulation is made with up to 80% recycled glass and features ECOSE® Technology. It’s low itch, formaldehyde-free, and a favourite among professional installers. Plus, it's available in a huge range of R-values to suit any application — and we stock it all.

Shop Perth’s Best Insulation Warehouse

Looking for an insulation warehouse in WA? Perth Insulation Centre offers fast delivery or same-day pick-up from our Canning Vale and Osborne Park locations.

You can also learn how to install roof insulation or know when to upgrade your insulation.

Final Thoughts

Whether you're retrofitting a home, insulating a shed, or planning a new build — we’re here to help you find the best insulation in Perth. Our team can help you compare R2.0, R2.5, R3.5, R4.0, R5.0, R6.0, and R7.0 insulation options and recommend the best fit.

Shop online now or call 0417 910 326 for a quote.