HYDRA Wall Underlay

  • HYDRA Wall Underlay is an absorbent, breathable, fire retardant, flexible wall underlay used behind all wall cladding. Suitable with absorbent and non-absorbent claddings in both direct and non-direct fixing.

    Features & Benefits:

    • Is an absorbent synthetic underlay
    • Is a breathable type underlay
    • Flammability index rating of ≤5
    • Can be left exposed for 60 days
    • Suitable in all wind zones including extra high when used with Rigid Air Barriers
    • Can be used with no internal wall linings ie: attic spaces.
    • Used for residential & commercial applications
    • Suitable on timber and steel framing
    • Meets provisions of NZBC: B2, E2 & F2
    • BRANZ Appraised # 1072 (2019)

  • HYDRA Wall Underlay
  • HYDRA Wall Underlay


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