Airtightness


 

Roof Space Condensation: Fix the Ceiling, Not Just the Vents

Ventilation alone won't dry a cold roof space. Jon Davies explains why sealing the ceiling at every scotia gap and around every unsealed downlight does more to reduce condensation than any vent.

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Airtightness and Clause H1: Getting the Full R-Value Out of the Insulation

Insulation only performs to its R-value when the air around it stays still. Here's how INTELLO PLUS makes airtightness count in your H1 calculations while keeping moisture out of the structure.

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Integrating Vapour Control and Ventilation for Moisture-Safe Design

Higher insulation levels change how a building handles moisture, requiring a coordinated approach between intelligent vapour control and mechanical ventilation to prevent structural damage.

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Achieving Predictable Performance with H1 Modelling

With the 2027 H1 deadline approaching, the pro clima technical team has expanded on recent industry updates to include specific detailing solutions for New Zealand architects and designers.

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Traditional Vapour Barriers vs Vapour Control Systems in NZ

Learn how INTELLO® and Pro Clima airtightness systems help manage moisture, condensation and drying potential for New Zealand homes.

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Energy Efficiency is Essential. But can we Afford It?

H1 Provides for the efficient use of energy and sets physical conditions for energy performance.

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Specifying for Airtightness and Testing

The guide specification helps define desired airtightness levels, set testing requirements, and ensure accuracy by using an ATTMA Registered Air Tightness Tester.

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When Air Leaks Become a Critical Failure Risk: Aquatic Centres

The new aquatic center was built to promote health and safety for kids, but the new owners noticed odd things about the building when the systems were turned on.

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Designing for Steam in Modern Buildings

We pipe water inside buildings, so what happens when we turn it into steam?

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Where Does the Airtightness Layer Go?

In New Zealand, it's crucial to get building layering right for summer and winter. Modern buildings include an intentionally airtight shell to conserve energy, whether for warmth or coolness.

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Renovation Opportunity and R-Values

In this article, I’m tackling real-estate adverts, renovation by paint, and discussing one area of cost for whole-house renovation and the connection between health and wealth.

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Building Science Soup

Building science is well-established in Europe, Canada, and the US, but terminology varies between countries, especially in emerging architecture, engineering, and construction fields.

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"Airtight" vs. "Breathable": What’s it all about?

This month, we examine "airtight" and "breathable" buildings. Is it possible to achieve both within the same building?

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