ISOLAIR MULTI wood fibre insulation boards are the perfect insulation solution for both modern and traditional homes. This eco friendly, rigid insulation board is used on pitched roofs, ventilated facades, EWI, and internally on solid walls in combination with a lime plaster. With a high thermal mass and excellent moisture buffering properties, the benefits of wood fibre are far more than just its environmental sustainability.
Some of the benefits of using Pavatex Isolair.
• Hardwearing and Weather-Resistant – An Isolair insulation board can be exposed to the elements for as much as 3 months during construction. Waterproof according to EN 14964.
• Breathable – This vapour permeable insulation board allows vapour to escape through the building fabric. Using wood fibre boards will drastically reduce the chance of damage to building fabric from trapped moisture.
• Fire Safety: Pavatex Woodfibre is an excellent material to be used as part a fire-resistant strategy. A high-density insulation which can resist extremely high temperature for long periods, charring on the surface when exposed to flame, it will burn at a very slow rate, and does not release asphyxiant assess.
• Sound Protection – Perfect for the quiet life! – Most of the external noise is kept outside thanks to the special fibre structure within the board.
• Truly Sustainable – Isolair is made from unused wood from various manufacturing mills meaning this product promotes low energy use and a positive C02 balance. Because this product is made from natural materials it can be re-purposed or recycled at the end of its usable life.
• Thermal Buffering – Pavatex Isolair offers protection from Summertime overheating. Decrement delays of up to 12 hours are achievable. In practice this means that a more pleasant, consistent temperature is achieved over the course of the day as opposed to huge peaks and troughs in-line with external day and night-time temperatures.
• No Harmful Additives – Some insulation on the market will contain additives such formaldehyde and other VOC’s, but nothing harmful to the environment or humans is added during the manufacture of Isolair.
Technical Data – (See ‘product downloads’ tab for full details)
• Edge Profile – Tongue & Groove
• Density [kg/m3] = 145-200
• Thermal conductivity (λd) = 0.041-0.044
• Specific heat capacity (c) [J/(kg.K)] – 2100
• Waste code according to The European Waste Catalogue (EWC) – 030105; 170201; 170604
Carbon Locking
Isolair Multi will lock in carbon throughout its lifespan. C02 lock-up in excess of -40 Kg CO2 eq / FU (A1-A3) at 0.15 u-value
The wood used to make these insulation boards is sourced from neighbouring sawmills from the waste material they can’t use.
Trees naturally capture CO2 from the atmosphere and lock it away as carbon. Increasing the use of sustainable wood products is one of the best ways to reduce the amount of C02 in the atmosphere.
The carbon from mature trees will be stored in buildings utilising timber building elements and other wood products after they are harvested.
The size of the European forest carbon sink continues to grow, as more trees are planted than get harvested. C02 emissions are greatly reduced when using sustainably sourced wood products as opposed to other C02 intensive materials.
This board follows on from the now obsolete Pavatex Pavatherm Combi board.
Isolair Multi Insulation Board – Technical Data
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SOME ITEMS ARE ONLY AVAILABLE IN FULL PALLETS
| Dimensions | N/A |
|---|---|
| Thickness | 30mm, 35mm, 40mm, 60mm, 80mm, 100mm, 120mm, 140mm, 160mm, 180mm, 200mm |
FAQs
Frequently Asked Questions – Pavatex Isolair Multi
What is Isolair Multi?
Isolair Multi is a rigid wood fibre insulation board that is breathable, windproof and water-repellent, designed for use in roofs, walls and floors for both modern and traditional buildings.
What material is Isolair Multi made from?
It is made from natural wood fibre using a dry production process, making it an ecological and sustainable insulation solution.
How does Isolair Multi help with thermal insulation?
Isolair Multi has a low thermal conductivity (λd) between 0.041 and 0.044 W/mK, which means it provides effective thermal insulation, helping reduce heat loss and lower energy bills.
Is Isolair Multi breathable?
Yes. The board is vapour-permeable, allowing moisture to pass through rather than becoming trapped in the building fabric, which helps prevent mould and damp problems.
Can Isolair Multi be used externally?
Yes. Isolair Multi is suitable for external walls and ventilated façades, as well as pitched roofs and other external applications.
When used on open façades, a UV-resistant breather membrane may be required.
Isolair Multi can be directly rendered onto using appropriate render products.
Can Isolair Multi be used internally?
Yes. It can be installed on internal walls, suspended timber floors and other internal insulation applications, often combined with breathable finishes like lime plaster.
Is Isolair Multi suitable for use with lime plaster?
Yes. The board can act as a plaster carrier or render base, making it compatible with lime plasters and mineral finishes when used in breathable wall build-ups.
What thicknesses is Isolair Multi available in?
The boards are available in multiple thicknesses ranging from 30 mm up to 200 mm, allowing you to tailor insulation levels to specific performance requirements.
Is Isolair Multi weather-resistant during construction?
Yes. The boards are windproof, water-repellent and can be exposed to weather for up to three months on site without damage, making installation easier.
Does Isolair Multi improve acoustic performance?
Isolair Multi offers sound-absorbing properties, thanks to its high density and wood-fibre composition, which can help reduce noise transmission.
Is Isolair Multi environmentally friendly?
Yes. Because it is made from sustainably sourced wood-fibre by-products, it is recyclable and contributes to lower embodied carbon in buildings. It also helps lock carbon within the structure over its lifetime.
What is the fire performance of Isolair Multi?
Isolair Multi has a reaction to fire class E (EN 13501-1), in line with many wood-fibre board insulation products.
How do Isolair Multi boards fit together?
They feature a tongue and groove edge profile, which aids alignment and helps create a continuous insulation layer with improved airtightness.
How does Isolair Multi perform better than PIR insulation?
Isolair Multi outperforms PIR insulation in breathability, moisture management, summer comfort and long-term building health, particularly in traditional and low-energy buildings.
Unlike PIR, which is vapour closed, Isolair Multi is highly vapour permeable, allowing moisture to pass safely through the building fabric. This significantly reduces the risk of interstitial condensation, trapped moisture and mould, making it far better suited to solid walls, timber frames and heritage construction.
Isolair Multi also offers excellent thermal mass and decrement delay, meaning it slows heat transfer through the structure. While PIR has a very low thermal conductivity value, it provides comparatively little protection against summer overheating. The dense wood fibre structure of Isolair Multi helps keep buildings cooler in hot weather and warmer for longer in winter.
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