Insulating Walls with Naturheld and Pavatex Wood Fibre
Insulating Walls
- Ideal for insulating masonry, timber/metal frame and CLT walls
- Vapour-open, hygroscopic and capillary-active insulation
- Ideal to use on solid-walled historic properties
- Adds thermal mass to timber/metal frame properties
- Buffers moisture so enhances internal air quality and comfort
- Significantly improves acoustic insulation
- Carbon-negative and natural, sustainable insulation – safe to handle
Naturheld and Pavatex Wall Insulation Solutions
External Wall Insulation
Internal Wall Insulation
Insulating Walls with Naturheld or Pavatex Wood Fibre
External Wall Insulation
External Wall Insulation (EWI) is our preferred method for insulating the walls of both new and existing properties. This approach involves wrapping the entire building envelope in insulation, effectively eliminating cold bridges through junctions, and providing protection against rain ingress. However, in cases where a building has a unique external appearance, EWI may not be feasible, necessitating internal wall insulation.
Naturheld 140/180 wood fibre boards are offered as a versatile solution for external insulation. These boards can be finished with either breathable render or ventilated cladding. Being breathable, Naturheld and Pavatex wood fibre insulation products are suitable for all substrate types, with particular effectiveness noted in solid-walled properties. In such cases, moisture is allowed to escape, helping the building fabric to remain dry, warmer, and healthier. As a result, the risks of mould, wet rot, and dry rot are significantly reduced.
In timber-framed properties, the use of Naturheld and Pavatex wood fibre insulation is strongly recommended. Moisture is prevented from becoming trapped in the timbers, thereby reducing the risk of rot. Additionally, it adds substantial thermal mass to timber frame buildings, helping regulate internal temperatures by storing excess heat for up to 10-12 hours before releasing it very gradually. Acoustic insulation is also improved due to the high density and fibrous composition of the wood fibre. Furthermore, moisture is buffered effectively, allowing optimal relative humidity levels to be maintained and contributing to a healthier, more comfortable indoor environment
Internal Wall Insulation
Internal Wall Insulation (IWI) with wood fibre is an excellent choice for thermally insulating the inside of external walls, especially for buildings with a unique external appearance that cannot be altered. Naturheld 140/180 wood fibre boards can be finished with breathable lime plaster or with an airtightness membrane and plasterboard.
Naturheld and Pavatex wood fibre insulation is ideal for IWI because it is vapour-open, capillary-active, and hygroscopic. This makes it suitable for use in solid-walled properties, which must remain breathable to prevent dampness and cold. Excessive dampness in the walls can lead to mould growth and rot. Naturheld and Pavatex wood fibre’s ability to absorb and release water vapour helps prevent condensation, mould growth and humidity, creating a pleasant, comfortable, and healthy interior climate.
However, it’s crucial not to over-insulate when internally insulating a solid wall. Please consult us for advice on the appropriate insulation thickness for your specific needs.