Trade Select Wall Wrap Micro-perforated Breather LD MD HD

Trade Select Wall Wrap Micro-perforated LD roll

Trade Select Wall Wrap Micro-perforated (Breather)

$52.20

$52.20 $58.00

GST inclusive

This size is on sale. Sale items are not included in the Opening Offer order discount. Offer details

Duty

Size

Dispatch: Most orders are processed the same day. Metro delivery: Usually 1–3 business days. We do our best to get most items out on the next business day.

Delivery to VIC and NSW: $55 in metro Melbourne and metro Sydney, $99 in the outer ring around both cities, $149 anywhere else in the two states · Local pickup from Epping, VIC by arrangement · Shipping details

Trade Select Wall Wrap Micro-perforated is the vapour permeable version of Ametalin's reflective wall wrap. Stocked in Light, Medium and Heavy Duty, each in 1350 mm and 1500 mm widths and 30 m or 60 m rolls. Coverage runs from 40.5 m² to 90 m² per roll.

Breather, not barrier

Light and Medium Duty are perforated to Class 4, at 1.600 and 1.717 µg/N·s. Heavy Duty is Class 3, at 0.3341 µg/N·s. All three let the wall dry outward instead of holding moisture against the frame. If the design calls for a vapour barrier instead, the solid version is Trade Select Wall Wrap, which is Class 2.

Check the climate zone before picking Heavy Duty

NCC 2022 sets a minimum vapour permeance for a membrane on the outside of the wall insulation. Zones 4 and 5 need 0.143 µg/N·s, so any of the three will do. Zones 6, 7 and 8 need 1.14 µg/N·s, which only Class 4 reaches. Melbourne is zone 6, so there it is Light or Medium Duty. Ametalin do not recommend any of the three for wet tropical zones.

It is not a water barrier

All three duties are classified Non-Water Barrier. Perforating a membrane to let vapour out also lets liquid water through, so these belong behind a masonry leaf or a drained cavity where the outer skin sheds the rain. They are not the wrap for direct fixed cladding.

Choosing the duty

The barrier classifications match apart from the vapour class. The difference shows up before the cladding goes on, while the frame stands wrapped and exposed. Light Duty is 0.09 mm, 10.9 kN/m machine direction with 444 N edge tear. Medium Duty is 0.10 mm and 11.5 kN/m against a higher minimum. Heavy Duty is 0.12 mm, 13.7 kN/m and 565 N edge tear.

Choose the roll length from the elevation

The 60 m rolls halve the number of end joins on a long run, and every join is a line that has to be lapped and taped correctly.

On site

Tape the joins and seal the penetrations with QuickTape, which is the tape Ametalin specify for permeable membranes. Keep the foil face to the cavity so the reflective side can work. The wrap is electrically conductive, so keep it clear of wiring. Full figures are in the table below.

Technical data

Ametalin Wall Wrap Micro-perforated MD data sheet (PDF)

Ametalin · Micro-perforated reflective foil laminate on woven polypropylene · Vapour permeable wall wrap application

Sizes stocked

Duty	Roll size	Coverage	Product code
Light Duty	1350 mm x 30 m	40.5 m²	TSLD-40-B
Light Duty	1350 mm x 60 m	81 m²	TSLD-81-B
Light Duty	1500 mm x 30 m	45 m²	TSLD-45-B
Light Duty	1500 mm x 60 m	90 m²	TSLD-90-B
Medium Duty	1350 mm x 30 m	40.5 m²	TSMD-40-B
Medium Duty	1350 mm x 60 m	81 m²	TSMD-81-B
Medium Duty	1500 mm x 30 m	45 m²	TSMD-45-B
Medium Duty	1500 mm x 60 m	90 m²	TSMD-90-B
Heavy Duty	1350 mm x 30 m	40.5 m²	TSHD-40-B
Heavy Duty	1350 mm x 60 m	81 m²	TSHD-81-B
Heavy Duty	1500 mm x 30 m	45 m²	TSHD-45-B
Heavy Duty	1500 mm x 60 m	90 m²	TSHD-90-B

Barrier classifications

Vapour control	Class 4 Vapour Permeable in Light and Medium Duty, Class 3 Vapour Permeable in Heavy Duty (ASTM E96)
Vapour permeance	1.600 µg/N·s Light Duty, 1.717 µg/N·s Medium Duty, 0.3341 µg/N·s Heavy Duty
Water control	Non-Water Barrier, all three duties (AS/NZS 4201.4:1994)
Air control	Air Barrier, all three duties (AS/NZS 4200.1:2017)
Electrical conductivity	Conductive

Non-Water Barrier means these wraps belong behind a masonry leaf or a drained cavity, not behind direct fixed cladding.

NCC 2022 minimum for an external wall

Climate zones 4 and 5	At least 0.143 µg/N·s. Met by all three duties
Climate zones 6, 7 and 8	At least 1.14 µg/N·s. Met by Light and Medium Duty only
Wet tropical climate zones	Not recommended by Ametalin for any of the three duties

NCC 2022 Housing Provisions 10.8.1(2), for a membrane on the outside of the primary insulation layer of an external wall. Melbourne is climate zone 6.

Strength, Light Duty

Duty classification	Light (AS/NZS 4200.1:2017)
Nominal thickness	0.09 mm
Tensile strength machine direction	10.9 kN/m (min 7.5 kN/m)
Tensile strength lateral direction	8.5 kN/m (min 4.5 kN/m)
Edge tear machine direction	444 N (min 45 N)
Edge tear lateral direction	372 N (min 45 N)

Strength, Medium Duty

Duty classification	Medium (AS/NZS 4200.1:2017)
Nominal thickness	0.10 mm
Tensile strength machine direction	11.5 kN/m (min 9.5 kN/m)
Tensile strength lateral direction	9.4 kN/m (min 6.0 kN/m)
Edge tear machine direction	444 N (min 65 N)
Edge tear lateral direction	358 N (min 65 N)

Strength, Heavy Duty

Duty classification	Heavy (AS/NZS 4200.1:2017)
Nominal thickness	0.12 mm
Tensile strength machine direction	13.7 kN/m (min 12.5 kN/m)
Tensile strength lateral direction	8.3 kN/m (min 7.5 kN/m)
Edge tear machine direction	565 N (min 80 N)
Edge tear lateral direction	380 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 1.29 winter, RT 1.21 summer
Brick veneer wall plus R2.7 batt	RT 2.93 winter, RT 2.78 summer
Emittance	Anti-glare side 0.90, foil side 0.03
Emittance category	RN

Calculated to AS/NZS 4859.2:2018 for typical mainland capital city conditions. The figures are the same for all three duties. The reflective face only contributes when it faces an air cavity.

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%)

Other duties

Extra Heavy Duty	Ametalin also make this wrap in XHD, product code TSXHD-B

We do not stock that grade. Contact us if a job specifies it and we will quote it.

Fitting notes

Install to AS 4200.2 Pliable Building Membranes and Underlays, Part 2, behind a masonry leaf or a drained cavity. Lap and tape the joins with QuickTape and seal around penetrations. Keep the foil face to the cavity so the reflective side can work. 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 sheets for Trade Select Wall Wrap LD Micro-perforated (TPM-45764-1, code TSLD-B), MD Micro-perforated (TPM-45764-3, code TSMD-B) and HD Micro-perforated (TPM-45764-4, code TSHD-B). The MD document is linked above. The climate zone minimums are from NCC 2022 Housing Provisions 10.8.1. Ametalin can change specifications without notice, so check the current sheet before specifying on a job.

Common questions

Is this the breather wrap?

Yes. Micro-perforated means vapour permeable: Class 4 in Light Duty (1.600 µg/N·s) and Medium Duty (1.717), Class 3 in Heavy Duty (0.3341). The barrier version is Trade Select Wall Wrap, which is Class 2.

Can I use it behind direct fixed cladding?

No. These wraps are classified Non-Water Barrier, so they need a masonry leaf or a drained cavity in front of them. Behind direct fixed cladding use a water barrier wrap.

Which duty do I need?

Start with the climate zone. In zones 6, 7 and 8, Melbourne included, NCC 2022 asks for at least 1.14 µg/N·s on the outside of the wall insulation, so it is Light or Medium Duty. In zones 4 and 5 all three qualify and the choice comes down to strength while the frame stands exposed: Light Duty 10.9 kN/m, Medium Duty 11.5 kN/m, Heavy Duty 13.7 kN/m with 565 N edge tear.

Why choose a permeable wrap at all?

It lets the wall dry outward. In climate zones where vapour moves from inside to outside for most of the year, a barrier wrap on the cold side is what traps moisture in the frame.

What R-value does it add?

Ametalin declare RT 1.29 winter for a brick veneer wall with the wrap alone, and RT 2.93 winter with an R2.7 batt added. The figures are the same for all three duties. The foil face needs the cavity in front of it to deliver that.