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ROCKWOOL Cool 'n' Comfort RL stone wool roll

ROCKWOOL

ROCKWOOL Cool 'n' Comfort RL stone wool roll

Stone-wool roll for single-skin metal roofs, laid over foil and wire mesh on the purlins — for heat and sound absorption.

Thickness
25–100 mm
Density
40–60 kg/m³
Thermal conductivity (λ)
0.034–0.035 W/m·K at 20 °C · ASTM C518

Choose model and size

1. Choose thickness
2. Choose model (density)
3. Choose roll size (width × length)
4. Facing (foil or unfaced)

Foil facing is offered for some models and sizes only; we confirm what can be supplied together with the price.

Your selection

ROCKWOOL Cool 'n' Comfort RL920 · Thickness 50 mm

Availability: Please enquire

This size is listed by a distributor in Thailand but is not in the manufacturer's documents. Please ask us before ordering.

Roll size (width × length)
1,200 × 7,500 mm120 × 750 cm
Density
40 kg/m³
Request a price for this size
Technical values for RL920
Thermal conductivity (λ)at 20 °C
0.035 W/m·K
Thermal resistance (R)RL920 / RL940 at 50 mm · RL920 (WFF) at 25 mm
1.43 m²·K/W

See all models and sizesManufacturer documentsTechnical specifications

Product details

Building thermal insulationStone wool (rock wool)ROCKWOOL

Stone wool roll · RL920 / RL940

Thickness
25–100 mm
Density
40–60 kg/m³
Thermal conductivity (λ)
0.034–0.035 W/m·K at 20 °C · ASTM C518
Noise reduction coefficient (NRC)
1.00–1.05 50 mm thickness

What is it?

Cool 'n' Comfort RL is a ROCKWOOL stone-wool roll for single-skin metal roofs. RL920 (40 kg/m³) suits well-ventilated areas such as food centres, walkways and pavilions; RL940 (60 kg/m³) is for residential roofs needing better long-term thermal performance. Thicknesses 50, 75 and 100 mm.

What is it made of?

Stone wool (rock wool) · Roll

What can it help with?

Hot house / hot roof

Which sizes are available?

Thickness 25–100 mm · 40–60 kg/m³ — Choose model and size

Where does the data come from?

Cool 'n' Comfort (slab and roll) — 800 356-08/25 V25-1 (TH)

Technical data from the manufacturer's documents ROCKWOOL · Checked 29 Sept 2026

Technical specifications

Technical values for each model from the manufacturer's data sheet. They apply to every thickness of that model unless a condition is given.

RL920

Density
40 kg/m³
Thermal conductivity (λ)at 20 °C
0.035 W/m·K
Thermal resistance (R)RL920 / RL940 at 50 mm · RL920 (WFF) at 25 mm
1.43 m²·K/W
Noise reduction coefficient (NRC)50 mm thickness
1.00

RL940

Density
60 kg/m³
Thermal conductivity (λ)at 20 °C
0.034 W/m·K
Thermal resistance (R)RL920 / RL940 at 50 mm · RL920 (WFF) at 25 mm
1.47 m²·K/W
Noise reduction coefficient (NRC)50 mm thickness
1.05

RL920 (WFF)

Density
40 kg/m³
Thermal conductivity (λ)at 20 °C
0.035 W/m·K
Thermal resistance (R)RL920 / RL940 at 50 mm · RL920 (WFF) at 25 mm
0.714 m²·K/W

All models

Water absorption (partial immersion)
1.00 kg/m²
Reaction to fire
Non-combustible, class A1 · gross heat of combustion ≤ 3.2 MJ/kg
Melting point
> 1,200 °C
Moisture absorption
less than 0.04% by volume
Test standards and sources

Models and sizes available

Roll sizes 120 × 500 cm, 120 × 750 cm, 120 × 200 cm, 120 × 760 cm · thicknesses 25, 50, 75, 100 mm. Sizes differ by model — all are listed below.

RL920 · 40 kg/m³

Thickness 50 mm

  • 1,200 × 5,000 mm120 × 500 cm 1 roll(s) / pack6.00 m²/packPlease enquire Ask price
  • 1,200 × 7,500 mm120 × 750 cm Please enquireDistributor listing Ask price

Thickness 75 mm

  • 1,200 × 5,000 mm120 × 500 cm Please enquireDistributor listing Ask price

Thickness 100 mm

  • 1,200 × 2,000 mm120 × 200 cm Please enquireDistributor listing Ask price

RL940 · 60 kg/m³

Thickness 50 mm

  • 1,200 × 5,000 mm120 × 500 cm 1 roll(s) / pack6.00 m²/packPlease enquire Ask price
  • 1,200 × 7,500 mm120 × 750 cm Please enquireDistributor listing Ask price

Thickness 75 mm

  • 1,200 × 5,000 mm120 × 500 cm Made to order / Please enquireDistributor listing Ask price

Thickness 100 mm

  • 1,200 × 2,000 mm120 × 200 cm Made to order / Please enquireDistributor listing Ask price

RL920 (WFF) · 40 kg/m³

Aluminium-foil-faced roll, 25 mm

Thickness 25 mm

  • 1,200 × 7,600 mm120 × 760 cm Please enquire Ask price

Pack quantities are based on sales information in Thailand. Please confirm the pack contents before ordering. Area per pack = roll size × rolls per pack.

Applications

RoofLess heat and rain noise from the roofFactoriesFactory roofs, machine noise and hot pipeworkHomesHeat, neighbour noise and echo at home

Highlights

  • Stone wool, non-combustible (A1 to EN 13501-1)
  • Helps with heat and sound absorption
  • Two densities: 40 and 60 kg/m³

Manufacturer documents

Cool 'n' Comfort (slab and roll) — 800 356-08/25 V25-1 (TH)PDF · ROCKWOOL (Thailand) · THROCKWOOL Thailand product page — Cool 'n' Comfort (product variant table)Web page · ROCKWOOL (Thailand) · THCool 'n' Comfort RL920 (WFF) — 800 357 (WFF)-08/25 V6 (TH)PDF · ROCKWOOL (Thailand) · TH

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