Submitted by marius@aptwrite.nz on Wed, 26/11/2025 - 11:35am
Cavity battens under E2/AS1 are primarily for drainage with limited ventilation. Using thicker (45 mm) battens instead of standard 18–25 mm ones can still meet NZBC E2 performance as an equivalent solution.
2 April 2024, Version 1
Cavity_Battens_Thicker_Than_25_mm.pdf
