Fletcher Resituff Building Blanket Light Duty Metal Roof Insulation
R1.3, 15 m x 1200 mm x 55 mm (18 m²)
$123.00
Sale price
$123.00
Regular price
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Fletcher Resituff Building Blanket Light Duty Metal Roof Insulation
$123.00
Sale price
$123.00
Regular price
GST inclusive
Opening Offer: 5% off orders over $1,000, 7% over $2,500, 10% over $4,000. Ends 30 November. Offer details
How many do you need?
Measure the wall, ceiling or roof area and take about 10% off for studs, joists and purlins.
You need
Which covers
Total
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
Fletcher Resituff Building Blanket is a light duty roofing blanket for residential metal roofs: 55 mm glasswool with a Material R-value of R1.3, faced on one side with Sisalation Multipurpose LD (431) polyweave reflective foil.
Light duty: check the span
Fletcher's AS 4200.2 duty table allows Resituff on spans up to 900 mm, supported or not, and up to 1200 mm only with safety mesh or similar underneath. An unsupported span over 900 mm, up to 1200 mm, needs the medium duty Permatuff. It suits houses and townhouses, not tiled roofs.
What R1.3 means
R1.3 is the Material R-value of the blanket alone, not a total roof figure. Compression cuts it, so Fletcher recommends a roof spacer where allowable. The foil needs a still air cavity of at least 20 mm to perform thermally. See roofing blanket R-values.
Fire and bushfire
Fletcher states it complies with AS 3959 from BAL-LOW to BAL-40 under metal sheet roofs. The faced blanket cannot be classified to AS 1530.1 as an assembly, so do not use it where non-combustible material is required.
Ordering and fitting
Sold by the roll, 1200 mm wide: 15 m covers 18 m² and 20 m covers 24 m². Allow about 5% for waste on a simple roof. Lay the foil facing inward and lap it at least 150 mm at every side and end join. Keep the rolls dry before, during and after installation, and take care near wiring and luminaires because the foil is electrically conductive. Full figures are in the table below.
Technical data
Fletcher technical data sheet (PDF)Sizes stocked
| Roll size | Material R-value | Thickness | Coverage | Product code |
|---|---|---|---|---|
| 15 m x 1200 mm | R1.3 | 55 mm | 18 m² | 4020341 |
| 20 m x 1200 mm | R1.3 | 55 mm | 24 m² | 4020342 |
Thermal
| Material R-value | R1.3 m²K/W |
|---|---|
| Thermal resistance | Complies with AS/NZS 4859.1 |
| Reflective foil | Needs a still air cavity of at least 20 mm to perform thermally |
R1.3 is the blanket on its own; Fletcher publishes no total roof R-value for it.
Facing and duty
| Facing | Sisalation® Multipurpose LD (431) polyweave reflective foil laminate, one side |
|---|---|
| Duty | Light duty (LD) |
| Side lap | 150 mm foil overlap along the left hand side edge |
| Spans up to 900 mm | Light duty, supported or unsupported |
| Spans over 900 mm up to 1200 mm | Light duty only when supported (safety mesh or similar) |
From Fletcher's duty selection table based on AS 4200.2; an unsupported span over 900 mm, up to 1200 mm, needs a medium duty blanket.
Fire
| Combustibility (AS 1530.1) | Cannot be classified as an assembly; the non-combustible result applies to unfaced Pink Building Blanket only |
|---|---|
| Flammability index, facing foil (AS 1530.2) | ≤5 |
| Ignitability index (AS/NZS 1530.3) | 0 |
| Spread of flame index (AS/NZS 1530.3) | 0 |
| Heat evolved index (AS/NZS 1530.3) | 0 |
| Smoke developed index (AS/NZS 1530.3) | 1 |
| Bushfire (AS 3959) | BAL-LOW to BAL-40 under metal sheet roofs |
Where non-combustible material is required, Fletcher says laying the blanket and the foil separately may comply.
Moisture and condensation
| Condensation | The reflective polyweave foil aids in minimising the risk of condensation in residential metal roofs |
|---|---|
| Moisture absorption | <0.2 % by volume after four days at 50 °C and 95% relative humidity |
| Roof ventilation | Must be installed to the requirements of the NCC |
| High humidity buildings | Not suitable (wet climates for long periods) |
Material and handling
| Glasswool | FBS-1 Glasswool Bio-Soluble Insulation® |
|---|---|
| Recycled content | Up to 80% |
| Maximum service temperature (ASTM C411/C447) | Glasswool 350 °C, polyweave facing 70 °C |
| Electrical | Foil laminate is electrically conductive |
| Weather | Keep dry; not to be exposed to weather before, during or after installation |
| Foil care | Keep away from water and alkaline materials such as wet concrete; no pressure cleaners or mineral based cleaners on the facing |
| Environmental | Zero ODP; no harmful levels of VOCs released |
Limits of use
| Roof type | Residential metal clad roofs; not suitable under tiled roofs |
|---|---|
| Compression | Reduces thermal performance; use a roof spacer where allowable |
| Modifications | Not permissible |
Compliance and warranty
| NCC 2022 energy efficiency | Complies with AS/NZS 4859.1 as referenced in NCC 2022 Volume 1 Clause J4D3 (1) and Volume 2 ABCB Housing Provisions Clause 13.2.2 |
|---|---|
| NCC 2022 insulation fire indices | Does not exceed the Spread of Flame or Smoke Developed indices required by NCC 2022 Volume 1, S7C7 |
| Installation | AS 3999:2015 and Fletcher installation guide IG01 |
| Warranty | Fletcher consumer 10 year product warranty, for personal, domestic or household purchases installed in NCC Class 1 buildings |
A commercial customer can apply to Fletcher for a job specific warranty statement.
Fitting notes
Install to AS 3999:2015 and Fletcher installation guide IG01. Lay the blanket ridge to gutter or parallel to the gutter with the foil facing inward, lap the foil at least 150 mm at every side and end join, and roll each new roll over the lap so the glasswool butts firmly against the last one. Check the roof sheet maker's maximum insulation thickness and leave enough sag for the blanket to recover to its nominal thickness. At the gutter, trim the glasswool at the fascia and let only the foil drape in, about 25 mm on pitches over 10 degrees; on lower pitches fold the foil over the blanket in a bull nose, and never let the glasswool hang into the gutter. Seal tears and openings with Vapastop 883 Reinforced Foil Tape or equivalent, cut with a sharp knife and straight edge rather than power tools, and take care near wiring and luminaires because the foil is electrically conductive.
Figures are taken from the Fletcher Insulation Technical Data Sheet for Resituff, RRTDS1 Revision 0, 10 May 2024, with span selection from the Tuff Building Blanket brochure BR047 Revision 1 (February 2025), fitting notes from installation guide IG01 Revision 4 and warranty terms from the Resituff Consumer 10 Year Warranty, CWAR9 Revision 0. The manufacturer document is linked above. Fletcher Insulation can change specifications without notice, so check the current sheet before specifying on a job.
Common questions
Can Resituff go under a tiled roof?
No. Fletcher lists it as not suitable under tiled roofs. It is made for residential metal clad roofs.
What span can the light duty facing handle?
Fletcher's duty table, based on AS 4200.2, allows Resituff on spans up to 900 mm with or without support, and over 900 mm up to 1200 mm only with safety mesh or similar underneath. An unsupported span over 900 mm, up to 1200 mm, needs a medium duty blanket such as Permatuff.
What R-value do I actually get?
R1.3 is the Material R-value of the 55 mm blanket, and Fletcher publishes no total roof figure. Compression reduces it, so Fletcher recommends a roof spacer where allowable, and the foil needs a still air cavity of at least 20 mm to perform thermally.
How much does one roll cover?
Both rolls are 1200 mm wide. The 15 m roll covers 18 m² and the 20 m roll covers 24 m². Fletcher suggests allowing about 5% for waste on simple areas and more on complex ones.
Can I use it where non-combustible material is required?
No. Fletcher says the faced blanket cannot be classified to AS 1530.1 as an assembly. Where non-combustible material is required, Fletcher notes that laying the blanket and the foil separately may comply.
Is it rated for bushfire areas?
Fletcher states it complies with AS 3959 from BAL-LOW to BAL-40 under metal sheet roofs. Fletcher's installation guide says to consult AS 3959 for the install method at each BAL.
Does it stop condensation under the roof sheet?
Fletcher says the reflective polyweave foil aids in minimising the risk of condensation in residential metal roofs. Roof ventilation still has to be installed to the NCC, and the product is not suitable where high humidity is present inside the building.
What warranty comes with it?
Fletcher gives a 10 year consumer product warranty for personal, domestic or household purchases installed to AS 3999 in residential NCC Class 1 buildings. A commercial customer can apply to Fletcher for a job specific warranty statement.
Cannot see your question? Ask our team and we will get you an answer.
Answers use the Fletcher Insulation Technical Data Sheet for Resituff (RRTDS1 Revision 0), the Tuff Building Blanket brochure (BR047 Revision 1), installation guide IG01 Revision 4 and the Resituff Consumer 10 Year Warranty (CWAR9 Revision 0).
