Wall Insulation for Existing Adelaide Homes (Not Just New Builds)

Think wall insulation is only for new builds? Think again. If you're living in an older Adelaide home built before the 2000s, there's a good chance your external walls aren’t insulated — or the insulation has degraded over time.

Upgrading wall insulation in an existing home can make a dramatic difference in year-round comfort, soundproofing, and energy savings — and it’s more achievable than you might think.

Why Insulate the Walls of an Existing Home?

In Adelaide's climate, wall insulation helps regulate temperature, keeping your home warmer in winter and cooler in summer. If your walls aren't insulated, you're losing energy (and money) every day through unnecessary heat transfer.

Benefits include:

• Improved thermal performance (lower energy bills)
• Increased soundproofing between rooms and external noise
• Greater home comfort, especially in extreme seasons
• Improved property resale value

Can You Retrofit Wall Insulation?

Yes — in most cases, wall insulation can be retrofitted into existing homes. The most common approach is to install batts during a renovation (when plasterboard is removed) or inject insulation into wall cavities via small holes if you’re not renovating.

Best results come from bulk batts during renovations or weatherboard cladding upgrades.

Best Earthwool Wall Insulation Options

We recommend the following for wall insulation in Adelaide homes:

• Earthwool R2.0 Wall Batts – Great for standard performance and affordability
• Earthwool R2.5 HD Wall Batts – Higher thermal and acoustic performance in tighter cavities
• Earthwool 14kg/m³ High-Density Batts – Excellent for soundproofing between rooms or multi-residential use

How Much Wall Insulation Do You Need?

This depends on your wall dimensions and R-value goals. Measure the square metre area of each external wall, and don’t forget to factor in stud spacing (most batts are designed for 450mm or 600mm centres).

If you need help with a take-off or quote, get in touch with our team — we work with homeowners, architects, and builders across South Australia.

Installation Tips (and When to Call a Pro)

If you’re opening up walls as part of a renovation, it’s the perfect time to install insulation yourself. If not, we recommend speaking with a professional about blown-in or injected insulation techniques.

Make sure any insulation installed is:

• Moisture-resistant (especially for older brick veneer homes)
• Fitted snugly with no gaps or compression
• Not blocking ventilation or electrical points

Fast Delivery to All Adelaide Suburbs

Adelaide Insulation Centre delivers wall insulation across Adelaide and South Australia — from metro areas like Prospect and Goodwood to the Adelaide Hills and coastal regions.

Shop online with confidence or get in touch for help choosing the right wall insulation for your renovation project.

Adelaide Insulation Centre – Helping you upgrade your home from the inside out.