How to Tell If Your Home Needs an Insulation Upgrade

coastlineinsulatio
May 1
2 min read

Insulation is essential for maintaining comfortable indoor temperatures and reducing energy bills. But many Kiwi homes—especially older ones—have inefficient or failing insulation. Knowing when and why to upgrade your insulation can lead to better comfort, health, and energy savings.

Why Does Insulation Deteriorate Over Time?

While most insulation materials are built to last, several factors can lead to decreased performance:

Compression or settlement over time reduces effectiveness
Moisture damage from leaks or poor ventilation
Rodents nesting in insulation materials
Old technology – older insulation often doesn't meet modern R-value requirements

Top Signs Your Home Needs an Insulation Upgrade

1. High Power Bills

If your heating or cooling bills are steadily climbing, poor insulation may be the cause. Inefficient insulation allows heat to escape in winter and enter in summer.

2. Cold Spots and Draughts

Uneven temperatures or chilly areas, especially near windows or floors, often indicate gaps in insulation coverage.

3. Condensation and Mold

Moisture inside your home may be a sign that insulation isn't controlling internal humidity or air flow correctly.

4. Uncomfortable Indoor Climate

Do you struggle to keep your home warm in winter or cool in summer? That's a clear symptom of insulation problems.

5. Older Home (Built Before 2000)

Many older homes were built with minimal or no insulation. If your house hasn’t had insulation work in 15+ years, it’s time for a reassessment.

How to Upgrade Insulation in an Existing Home

Step 1: Get a Professional Audit

Hire a certified insulation assessor or home energy auditor. They’ll inspect the ceiling, underfloor, and (if applicable) walls for:

Insulation levels and coverage
Material degradation
R-value compliance

Step 2: Choose the Right Materials

Popular upgrade choices in NZ include:

Glasswool or polyester batts for ceilings
Foil board or polystyrene panels for underfloors
Blown-in insulation for hard-to-reach cavities

Step 3: Ensure Proper Installation

Use licensed professionals who comply with NZS 4246 installation standards. DIY jobs can miss key areas or compromise safety.

The Benefits of Upgrading Insulation

✅ Lower energy bills
✅ More consistent indoor temperatures
✅ Improved indoor air quality
✅ Higher property value
✅ Healthier living environment

Insulation isn’t a "set and forget" part of your home. Like your roof or plumbing, it needs attention over time. A well-insulated home is warmer, healthier, and cheaper to run—so if you’re seeing the warning signs, it’s time to take action.