Things People Forget When Updating Insulation in Heritage Homes

Things People Forget When Updating Insulation in Heritage Homes

Heritage homes are loved for their charm, but they’re rarely known for energy efficiency. Poor insulation is one of the biggest contributors to draughts, heat loss, and dampness in older houses. Updating it can transform how your home feels—but there are important details to get right to protect your property’s structure and character.

At W O Flatz Construction Ltd, we’ve worked on many heritage renovations across Auckland. Here’s what people often forget when upgrading insulation in these unique homes.

1. Insulation Isn’t Just About Warmth

Good insulation also helps manage moisture. In older homes, poor ventilation combined with modern airtight products can trap condensation and lead to mould or timber decay.

Tip: Pair insulation upgrades with a ventilation plan. Options like passive vents or extractor fans help keep air moving and protect your home.

2. Not Every Wall Can Be Insulated Easily

Heritage homes often have solid timber or masonry walls without cavities. Retrofitting insulation into these areas can be invasive and risks damaging original linings.

Tip: Focus first on accessible areas like ceilings and underfloors, which are usually responsible for the greatest heat loss. Wall insulation is best considered during larger renovations when linings are already being removed.

3. Ceiling Spaces Can Be Tricky

Attics in older homes are often tight and irregular, with limited space for insulation. Installing thick batts may compress them, reducing their effectiveness.

Tip: Discuss options like blown-in insulation with your builder for hard-to-reach roof spaces.

4. Heritage Restrictions May Apply

If your home is protected under a heritage overlay, you may need to seek consent for changes that affect the exterior, like installing insulation under weatherboards or adding double glazing.

Tip: Check with Auckland Council early to understand any restrictions, especially if work will alter the home’s appearance.

5. Gaps and Draughts Make a Big Difference

Even the best insulation won’t perform well if draughts are coming in through gaps in floors, windows, and doors.

Tip: Include draught-stopping in your insulation upgrade. Sealing around skirting boards and repairing or replacing window seals can make a surprising difference.

6. Choose Materials Carefully

Some modern insulation products aren’t compatible with the breathable nature of heritage homes. Blocking airflow entirely can lead to condensation inside walls.

Tip: Consider breathable or natural insulation materials where appropriate. Your builder can recommend options that work with the way older houses are built.

7. Plan Around Other Renovation Work

Insulation is easier and more cost-effective to install when walls, floors, or ceilings are already open.

Tip: If you’re planning a renovation, coordinate insulation upgrades with other trades to avoid extra labour costs later.

8. Work With a Builder Who Understands Heritage Homes

Heritage homes require a different approach than modern houses. At W O Flatz Construction, we take care to protect original features while improving comfort and energy efficiency. With over 30 years’ experience in Auckland, we can help you upgrade your insulation without compromising your home’s character.

In Summary

Upgrading insulation in a heritage home can make a huge difference to warmth and comfort, but it requires careful planning. By choosing the right materials, addressing ventilation, and working with an experienced builder, you’ll protect your home’s structure and enhance its liveability.

If you’re planning insulation upgrades as part of a renovation, we’d love to help.

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