R2.7 Fletcher Soundbreak Acoustic Insulation Batts

1/5

$64.60

$64.60 $68.00

GST inclusive

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

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

R2.7 Pink Soundbreak Batts are high density glasswool batts from Fletcher Insulation, 90 mm thick and dyed green so you can see at a glance which cavities have been done. They are built for acoustic work in walls, ceilings and midfloors, and they carry a useful thermal figure at the same time.

Where it goes

The batt sits inside the stud or joist cavity and cuts sound transfer between rooms, or from outside through an external wall. Typical jobs are internal walls around theatre rooms, bathrooms, laundries and kitchens, plus midfloors.

Acoustic ratings

The Rw and Rw+Ctr you end up with belong to the whole wall or floor system, not to the batt alone. Framing, lining, fixings and any gaps all change it. Tell us your build-up and we will send the system report that matches it.

Sizes

Eight batts per pack: 1160 x 430 mm (3.99 m²) and 1160 x 580 mm (5.38 m²) for timber frames, 1200 x 600 mm (5.76 m²) for steel frames. Nominal density is 24 to 32 kg/m³. For a thicker cavity, R3.1 Soundbreak is the 110 mm version.

On site

Cut with a sharp knife on a firm surface and friction fit between the studs or joists. The batt has to touch the frame on all four sides with no gaps, because a gap is where sound gets through. Do not squash it in. Non-combustible to AS 1530.1 and rated BAL Low through to Flame Zone. Full figures are in the table below.

Technical data

Fletcher technical data sheet (PDF)

Fletcher Insulation · Glasswool · Acoustic wall, ceiling and midfloor application

Sizes stocked

Size (L x W x thickness)	Frame type	Batts per pack	m² per pack	Product code (old / new)
1160 x 430 x 90 mm	Timber	8	3.99 m²	902298 / 4010570
1160 x 580 x 90 mm	Timber	8	5.38 m²	902299 / 4010571
1200 x 600 x 90 mm	Steel	8	5.76 m²	902300 / 4010572

Thermal

Material R-value	R2.7 m²K/W
Nominal thickness	90 mm
Maximum service temperature	340 °C (ASTM C411/C447)
Thermal conductivity	Complies with AS/NZS 4859.1

Fire

Combustibility	Non-combustible (AS 1530.1)
Ignitability index	0
Spread of flame index	0
Heat evolved index	0
Smoke developed index	1
Bushfire areas	BAL Low through to Flame Zone (AS 3959)

Early fire hazard indices tested to AS/NZS 1530.3.

Acoustic

Nominal density	24 to 32 kg/m³
Purpose	Sits inside the stud or joist cavity to cut sound transfer between rooms, or from outside through external walls
Typical uses	Internal walls around theatre rooms, bathrooms, laundries and kitchens, plus midfloors

Achieved Rw and Rw+Ctr depend on the whole wall or floor system, not on the batt alone. Ask us for the system report that matches your build-up.

Material and handling

Composition	High density flexible glasswool, dyed green for identification once installed
Moisture absorption	Under 0.2% by volume (ASTM C1104)
Fungi resistance	Pass, no growth (ASTM C1338-14)

Compliance

Thermal rating	Complies with AS/NZS 4859.1
NCC 2022	AS/NZS 4859.1 per Volume 1 J4D3(1) and ABCB Housing Provisions 3.12.2(1)
NCC 2022 sound insulation	Thickness and density cover Volume 1 Specification 28 and ABCB Housing Provisions Part 10.7
NCC 2022 non-combustibility	Non-combustible per AS 1530.1

Compliance applies when the product is correctly specified and installed.

Fitting notes

Cut with a sharp knife on a firm surface and friction fit between the studs or joists. In steel framing, insert the batt into the open side of the channel and do not let it protrude past the studs. The batt should touch the frame on all four sides with no gaps at the top, bottom or edges, since a gap is where sound gets through. Do not squash it in. Full thickness is what gives you the rated performance. Keep it dry before, during and after fitting.

Figures are taken from the Fletcher Insulation technical data sheet for Soundbreak batts, Revision 7, issued 9 October 2024. The full manufacturer document is linked above. The frame type for each size is from the Fletcher Pink Batts trade brochure, BR025 Revision 2, March 2026, and the steel frame fitting note from the Fletcher installation guide IG06 Revision 5. Fletcher can change specifications without notice, so check the current sheet before specifying on a job.

Common questions

What sizes are stocked and how much does each one cover?

3 options are stocked, running from 1160 x 430 x 90 mm to 1200 x 600 x 90 mm. The table above lists each one with the coverage or quantity you get.

What thermal performance does it have?

Material R-value: R2.7 m²K/W. Maximum service temperature: 340 °C (ASTM C411/C447). Thermal conductivity: Complies with AS/NZS 4859.1. Thermal rating: Complies with AS/NZS 4859.1.

How does it perform in a fire?

Combustibility: Non-combustible (AS 1530.1). Ignitability index: 0. Spread of flame index: 0. Heat evolved index: 0. Smoke developed index: 1. NCC 2022 non-combustibility: Non-combustible per AS 1530.1.