SISALWOOL™ is a blend of sisal fibre, a sustainable fibre crop, and sheep wool.  We are currently producing using recycled materials, so the sisal fibre is sourced from recycled coffee sacks, and the wool is sourced from waste from the wool carpet making industry.

SISALWOOL™ has a similar thermal performance to stone wool type products and a better thermal performance than glass fibre.

SISALWOOL™ uses natural and recycled fibres so has a very low carbon footprint.  Offcuts can also be recycled.

Typically wherever you have timber studs, SISALWOOL™ can be used in-between.  this could be in a wall, a pitched roof, or even under a suspended timber floor.

No, although a specialist insulations saw will give a neater cut than a general purpose wood saw

yes, SISALWOOL™ has passed the Euro-class E surface spread of flame test.  This test involves holding a blowtorch to the insulation, and when the flame is removed, the fire self-extinguishes. Click Here For Fire Resistance Video

Yes, SISALWOOL™ is ideal for acoustic insulation, and particularly for preventing the reverberation of sound within internal stud walls between rooms. The Acoustic Performance is 12dB reduction at 500-2000Hz

We recommend using SISALWOOL™ insulation internally within the building, for a wide range of applications including roof, wall and floor insulation.  It is particularly suited to use in traditional buildings due to its breathability.

No, it is much safer and more pleasant to work with than most insulation products

Yes, although due to fire regulations it is not certified for use in buildings more than 18m tall.

You can find them on each product page. They can also be downloaded here.

Yes, Some funding is available from Home Energy Scotland / Business Energy Scotland & The Great British Insulation Scheme.

Every batch of SISALWOOL™ is tested to meet the required UK fire safety standard. Our product has an E Class fire rating, meaning it meets the basic safety requirements. While wool naturally resists flames up to a point, and our sisal fiber is treated for fire resistance, both materials will eventually burn under high enough heat.

See our fire testing in action.

R-Value

• Definition: The resistance to heat flow (higher is better).
• Units: Square meter Kelvin per Watt (m²·K/W).
• Calculation:For 100mm (0.1m) Sisalwool:

100mm = 2.63

200mm = 5.26

270mm = 7.11

Definition: The rate of heat transfer through a material (lower is better).

Units: Watts per square meter per Kelvin (W/m²·K).

100mm = 0.38

200mm = 0.19

270mm = 0.14

Thermal conductivity for Sisalwool ~0.038 W/mk. Rockwool ~0.034 - 0.037 W/mk

R-Value for 100mm Sisalwool ~2.63 m²·K/W Rockwool ~2.70 - 2.94 m²·K/W

Yes Sisalwool can be used on a boat, we would recommend attaching a waterproof membrane to the hull prior to installation.