Creating healthy indoor environments requires more than just good ventilation; it starts with an external envelope that controls moisture, manages airflow, and supports consistent thermal performance. IBS RigidRAP XT is a rigid air barrier and bracing system designed to help architects deliver drier, more comfortable homes by improving airtightness, reducing condensation risk, and providing a built in thermal break.

Improving moisture and airflow control

RigidRAP XT combines an OSB3 rigid panel, integrated building paper, and a 10mm rigid foam thermal layer. This multi layer system:

• Minimises the movement of warm, moist indoor air into colder wall cavities
• Reduces the likelihood of interstitial condensation
• Provides a robust air barrier for more predictable ventilation performance
• Helps maintain healthier indoor humidity levels

With its mechanically fixed rigid panel, RigidRAP XT delivers significantly improved airtightness over flexible wraps — an essential factor for air quality and controlled ventilation strategies.

Thermal comfort and energy efficiency

The panel’s built-in R Value of 0.41 exceeds NZBC thermal break requirements, helping reduce cold bridging and cold spots on interior surfaces. This contributes to more stable indoor temperatures year-round and reduces conditions that encourage condensation growth.

Project example 

John Thrupp, Evolve Builders says: 

"We used RigidRAP XT for our new build and had an excellent experience from start to finish. This was our first time working with the product, and we were genuinely impressed with how easy it was to work with and install."

"The product went on extremely well, the quality was excellent, and the finished result looks fantastic."

"Overall, the service and product were amazing, and the whole process felt seamless. We’re extremely happy with the outcome and would confidently recommend IBS (Independent Building Supplies) when considering their products for a build."

Support for designers:

IBS provides architects with:

• Bracing layout assistance
• Advice on integrating RigidRAP XT with mechanical ventilation systems
• On-site training and quality assurance

This ensures the product isn’t just specified but applied as part of a well-considered building envelope strategy.

As residential homes become more airtight and thermally efficient, the building envelope plays an increasing role in controlling moisture, airflow, and indoor comfort. RigidRAP XT helps architects create healthier, more resilient living environments by delivering airtightness, moisture protection, and thermal stability in a single engineered panel.