Covertek 403 (wall)

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Covertek 403 (wall)

Covertek 403 Plus is a fire retardant, absorbent and breathable synthetic wall underlay, constructed using a microporous water resistant film sandwiched between two layers of shrink resistant spun-bonded polyolefin. Designed as a means of managing condensation, water vapour transfer and water ingress in wall applications.

Key Features

BRANZ appraised
CODEMARK
Water barrier
Fire retardant
Breathable
Absorbant
Strong & durable
Light weight

Advantages

Can be used as direct fix or cavity fix for wall constructions, more stable and more shrink resistant than kraft based underlays.
May be installed during adverse conditions (rain) without affecting durability or performance.
Will not increase risk of condensation as compared with comparable kraft underlays.
Is light weight with tear resistance.
Has a 150mm printed lap-line

Properties	Unit
Construction:	Non-Woven / Breathable Film / Non-Woven
Basis Weight (g/m²):	105
Roll Sizes (m²):	1350mm x 18.5m(25m2), 1350mm x 37m(50m2), 1350mm x 55.6m(75m2)
Roll Weight (kg):	7.87, 5.25, 2.62
Flamability (Fl):	5
Water resistance (mm):	Requirement: 100mm (Roof Underlay) Pass:
Vapour Permeability (µg/N.s):	> 3.0
Vapour Resistance (MN.s/g):	< 0.5 Requirement: ≤7.0
pH Extract (pH):	Requirement: 5.5-8.0 Pass:
Shrinkage (%):	Requirement: ≤ 2% Pass:
Air Barrier:
Durability (Years):	15 / 50
Max UV Exposure (days):	7 roof 42 Wall
Wind Zone:	Very High Requirement: R1/R2/W2
Duty Classification:	Requirement: R1
Absorbency (g/m²):	≥ 150
Cavity:
Cladding:	Direct Fix Absorbent Cladding, Direct Fix Non Absorbent Cladding, Direct Fix Metallic Cladding
Breathable:
Vapour Control Layer:	--
Roof Pitch:	> 10°
Supported:	Supported
Fire Retardant:

DATASHEET Covertek 403 v5 1120.pdf

BRANZ Covertek 403 0220.pdf

INSTALL GUIDE Covertek 403 v2 1120.pdf

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Covertek 403 (wall)

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Covertek 403 (wall)

Key Features

Advantages

Drainage Mat - roof

White General Purpose Tape

Thermastrap

Stud Strap

Aluband Window Flashing Tape

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