Trade Select Wall Wrap xR Micro-perforated HD

$132.00

GST inclusive

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Trade Select Wall Wrap xR Micro-perforated HD is the wall wrap Ametalin built for brick veneer and drained cavity walls. It is vapour permeable and double sided reflective at the same time, which is an unusual combination and the reason it costs more than a plain breather wrap.

Permeable and reflective together

The micro-perforation pattern gives Class 4 vapour permeance at 1.450 µg/N·s, so indoor water vapour can pass out into the cavity rather than condensing inside the wall. Both faces are reflective, 0.05 anti-glare and 0.03 foil, so the cavity between the frame and the brick leaf turns into a reflective air space. Ametalin declare RT 1.72 winter for a brick veneer wall with the wrap alone, and RT 3.40 winter with an R2.7 batt added.

Not a water barrier

Read this part carefully. It is classified Non-Water Barrier. Perforating a membrane to let vapour out also lets liquid water through, so this belongs behind a masonry leaf or a drained cavity where the outer skin sheds the rain. It is not the wrap for a direct fixed cladding wall. Use the Class 2 Trade Select Wall Wrap or the Wall Wrap Micro-perforated range there instead.

Heavy duty

Tensile strength 15.3 kN/m machine direction against a 12.5 kN/m minimum, edge tear 499 N against 80 N, thickness 0.12 mm. It is an air barrier, and flammability index is Low, at or below 5, with compliance to AS 3959-2018 for all BALs.

On site

Keep the cavity clear so the reflective faces have air in front of them and the drainage path stays open. The wrap is electrically conductive, so keep it clear of wiring. Install to AS 4200.2. Full figures are in the table below.

Technical data

Ametalin technical data sheet (PDF)

Ametalin · Double sided reflective micro-perforated foil laminate · Brick veneer and drained cavity wall systems application

Sizes stocked

Roll size	Coverage	Product code
1350 mm x 30 m	40.5 m²	TSHD-XR-40-B

Barrier classifications

Vapour control	Class 4 Vapour Permeable (ASTM E96)
Vapour permeance	1.450 µg/N·s
Water control	Non-Water Barrier (AS/NZS 4201.4:1994)
Air control	Air Barrier (AS/NZS 4200.1:2017)
Electrical conductivity	Conductive

Non-Water Barrier means it must sit behind a masonry leaf or a drained cavity, not behind direct fixed cladding.

Strength

Duty classification	Heavy (AS/NZS 4200.1:2017)
Material thickness	0.12 mm
Tensile strength machine direction	15.3 kN/m (min 12.5 kN/m)
Tensile strength lateral direction	13.1 kN/m (min 7.5 kN/m)
Edge tear machine direction	499 N (min 80 N)
Edge tear lateral direction	486 N (min 80 N)

Fire

Flammability index	Low, at or below 5 (AS 1530.2-1993)
Bushfire areas	All BALs (AS 3959-2018)

Seek independent advice on membrane selection before installation in a BAL design.

Thermal, declared total system R-value

Brick veneer wall with the wrap alone	RT 1.72 winter, RT 1.68 summer
Brick veneer wall plus R2.7 batt	RT 3.40 winter, RT 3.26 summer
Emittance	Anti-glare side 0.05, foil side 0.03
Emittance classification	IR Reflective both faces
Emittance category	RR

Calculated to AS/NZS 4859.2:2018 for typical mainland capital city conditions. Each reflective face needs an air cavity in front of it to contribute.

Durability

Dry delamination	Pass (AS/NZS 4201.1:1994)
Wet delamination	Pass (AS/NZS 4201.2:1994)
Shrinkage, repeated wetting and drying	0.0% (limit under 0.5%)

Compliance

Standards	AS/NZS 4200.1:2017
NCC	Meets NCC requirements for pliable building membranes and sarking-type materials

Fitting notes

Install to AS 4200.2 Pliable Building Membranes and Underlays, Part 2, in a brick veneer or drained cavity wall. Keep the cavity clear so the reflective faces see air and the drainage path stays open. The product is electrically conductive, so keep it clear of wiring. Store the rolls undercover in a clean dry place in the pack provided, away from cement, mortar and other alkaline products.

Figures are taken from the Ametalin technical data sheet for Trade Select Wall Wrap xR Micro-perforated HD, TPM-23247-5, product code TSHD-XR-B. The manufacturer document is linked above. Ametalin can change specifications without notice, so check the current sheet before specifying on a job.

Common questions

Can I use this behind direct fixed cladding?

No. It is classified Non-Water Barrier, so it needs a masonry leaf or a drained cavity in front of it to shed the rain. Behind direct fixed cladding use a water barrier wrap instead.

What does xR add?

Extra R-value from a second reflective face. Both sides are low emittance, 0.05 and 0.03, so the cavity between the frame and the brick leaf works as a reflective air space. Ametalin declare RT 1.72 winter for the wall with the wrap alone.

Is it vapour permeable?

Yes, Class 4 at 1.450 µg/N·s, the most permeable class. The micro-perforations let indoor water vapour move out into the cavity.

What is the point of a permeable wrap in a brick veneer wall?

It lowers the risk of interstitial condensation. Vapour that reaches the wrap from inside passes through instead of condensing on a cold barrier inside the wall.

How much wall does one roll cover?

1350 mm x 30 m, 40.5 m² before laps. The Ametalin sheet rounds this to 40 m².

Can I use it in a bushfire area?

Yes. Flammability index Low, at or below 5, and it complies with AS 3959-2018 for all BALs. Take independent advice on membrane selection before locking in the BAL design.

Cannot see your question? Ask our team and we will get you an answer.

Answers use the Ametalin technical data sheet for Trade Select Wall Wrap xR Micro-perforated HD, TPM-23247-5.