When it comes to insulation, homeowners are often drawn to traditional choices like fiberglass batts or blown-in cellulose due to their low upfront cost. But what many don’t realize is that these systems come with serious risks and performance limitations—especially in Australian climates.
Let’s break down why SPF (Spray Polyurethane Foam) is a safer, smarter and more effective solution.
🔥 Risk #1: Fire Hazards & Air Gaps
Fiberglass is not inherently fireproof. It may melt or collapse under high heat, and if improperly installed, can leave air gaps that allow flames to spread.
✅ SPF Advantage:
SPF fills every cavity and acts as an air and vapor barrier, which reduces oxygen pathways for fire and limits spread. Fire-rated SPF products can be used to meet building code compliance.
🌬️ Risk #2: Poor Air Sealing = Energy Loss
Fiberglass doesn’t stop air movement. If batts don’t fit snugly, warm or cool air escapes—meaning your HVAC works harder.
✅ SPF Advantage:
SPF creates a seamless seal, dramatically reducing heating and cooling costs (often by 30–50%). Especially useful in Australian homes with high summer temps or cold winter nights.
💧 Risk #3: Moisture Retention & Mould Growth
Fiberglass can absorb moisture if roof leaks or condensation occurs, becoming a breeding ground for mould, mildew, and dust mites.
✅ SPF Advantage:
Closed-cell SPF is moisture-resistant and prevents water infiltration. It adds structural rigidity and won’t sag or deteriorate like traditional insulation.
🐀 Risk #4: Pest Nesting & Degradation
Rodents love nesting in fiberglass. Cellulose can degrade over time, reducing R-value and effectiveness.
✅ SPF Advantage:
SPF is uninhabitable for pests, making your home more secure. Its long lifespan (50+ years) ensures consistent performance.
📊 Bottom Line:
Feature | Fiberglass Batts | SPF Insulation |
Air Sealing | ❌ Poor | ✅ Excellent |
Moisture Resistance | ❌ Absorbs Water | ✅ Repels Water |
Pest Deterrence | ❌ Attracts Pests | ✅ Repels Pests |
Structural Strength | ❌ None | ✅ Adds Support |
R-Value Longevity | ❌ Degrades | ✅ Long-lasting |
Energy Efficiency | ❌ Low | ✅ High |
📌 Conclusion
If you’re building or renovating in Australia, don’t settle for outdated insulation that costs you more over time. Spray Foam Insulation offers durability, performance, and long-term ROI that traditional materials simply can’t match.