Product Finder

Cladding:

Fire Retardant:

Roof Pitch:

Supported or Self Supporting:

Breathable: Any Yes No
Vapour Control Layer: Any Yes No
Air Barrier: Any Yes No

Products  >  Underlay  >  Cover - Up
  • Product Overview
  • Technical Information
  • PDF Downloads

Cover - Up

Fire Retardant Breather type Wall Underlay, coated woven polyolefin with micro sized pores that allow the Underlay to breathe. Is designed for use in domestic and commercial type buildings and may be used at gable ends as an air barrier. Suitable for all Buiding Wind Zones up to "Extra High Wind Zone".

Key Features

  • Fire Retardant
  • Fully Synthetic
  • Air Barrier

Advantages

Breather type Wall Underlay for use on timber framed buildings with absorbant wall claddings direct fix to framing, and with absorbant and non-absorbant wall claddings on a drained cavity. Can be used as an Air Barrier where walls are not lined such as gable ends, and suitable for Building Wind Zones up to "Extra High" .  Cover - Up is unaffected by LOSP treated timber.

PropertiesUnit
Construction:
Coated Woven Polypropylene
Basis Weight (g/m²):
97
Roll Sizes (m²):
2740mm x 25, 2740mm x 50, 2740mm x 100, 1370mm x 50, 1370mm x 50
Roll Weight (kg):
2.4, 4.8, 9.7, 4.8, 9.7
Flamability (Fl):
< 5
Water resistance (mm):
Requirement: 20mm (Wall Underlay)
Pass: Yes
Vapour Permeability (µg/N.s):
≥ 0.35
Vapour Resistance (MN.s/g):
≤ 3.0
Requirement: ≤7.0
pH Extract (pH):
Requirement: 5.5-8.0
Pass: Yes
Shrinkage (%):
Requirement: ≤ 2%
Pass: Yes
Air Barrier:
air_barrier
Durability (Years):
50
Max UV Exposure (days):
60
Wind Zone:
Extra High
Requirement: R1/R2/W1/W2
Duty Classification:
W3
Requirement: W1/W2/R1/R2
Cavity:
is_cavity
Cladding:
Direct Fix Absorbent Cladding
Breathable:
is_breathable
Vapour Control Layer:
--
Fire Retardant:
fire_retardant
Air Barrier (MN s/m³):
Requirement: ≥0.1
Pass: Yes