Wood Fibre: it’s all in the trees…
Wood Fibre insulation is a fairly recent addition to the EWI Pro insulation catalogue, offering many advantages for end-users. Today’s blog is going to be looking at a few of the many reasons why you would want to insulate your home using the most natural of all insulation materials: Wood Fibre.
Looking for a more general idea of how external wall insulation can benefit you and your home? Check out our dedicated blog here.
Wood Fibre is Eco Friendly
One of the main advantages of Wood Fibre insulation is how environmentally friendly it is. We source our Wood Fibre insulation from a company called Pavatex, who aim to ensure that their Wood Fibre production process is as eco-friendly as possible. Pavatex are sustainable and environmentally conscious at every turn, creating their Diffutherm insulation boards from waste shavings created by local sawmills that use wood from sustainable forests. Indeed, Pavatex claim not to use ‘any old wood’ for their eco friendly insulation, a statement that is further emphasised by their prestigious NaturePlus certification.
Wood Fibre offsets an impressive 1.6 tonnes of carbon for every ton of material. From the environmentally conscious timber sourcing and manufacturing process, to the actual purpose of the product (reducing energy consumption in homes), Pavatex have done everything in their power to make their Wood Fibre the most eco-friendly it can possibly be. It’s also 100% recyclable and compostable, so at the end of its long lifespan the Wood Fibre can be safely disposed of in a non-harmful way.
Wood Fibre is Breathable
Wood Fibre insulation is naturally vapour permeable. This means that water vapour can travel through the material from the inside to escape on the outside, an essential asset for most buildings in order to prevent damp and structural decay. This is an essential advantage of using Wood Fibre insulation when it comes to older homes. Popularly used with a highly breathable silicone render, or even a traditional lime render, Wood Fibre insulation systems offer a high performance solution for even the oldest of the UK housing stock.
Wood Fibre has a low thermal conductivity
Going back to basic science, wood is a poor thermal conductor and therefore has excellent insulating capabilities. In terms of U-values, a 200mm thick board of Wood Fibre attached to a 215mm thick solid brick wall can bring the U-value of the wall down to new-build standards – 0.18w/m2k.
Wood Fibre is Fire Safe
Fire safety for cladding materials is understandably a large concern for many homeowners since the Grenfell tragedy, however Wood Fibre insulation is rated a Class E combustible material. This is because rather than encouraging the flames to grow, the timber typically chars which in turn slows down the spread of fire.
Wood Fibre insulation offers a tight thermal envelope and improved indoor air quality
Another advantage of Wood Fibre insulation is that because external wall insulation is secured to the exterior of a property, the thermal envelope is much more complete than with internal insulation as there are practically no gaps in the insulation. This leaves no room (literally) for thermal bridges, which means that the overall effectiveness of the insulation is much higher. What makes Wood Fibre unique is that it’s incredibly easy to install because it is tongue and grooved, meaning the boards slot together seamlessly so gaps between boards are minimised.
As well as this, because Wood Fibre insulation is such a clean material, it does not release any kind of harmful chemicals and its insulating capabilities prevents harmful emissions from entering the property through the building fabric. Indoor air quality is therefore much higher with Wood Fibre insulation.
Wood Fibre Provides Sun Protection on Lightweight Buildings
This advantage of Wood Fibre insulation goes hand in hand with its abilities to prevent heat loss. Wood Fibre insulation keeps buildings significantly cooler during hot summer days where solar gain is at a maximum. This is because it has the highest thermal mass properties of all insulation materials; this means that Wood Fibre can absorb and retain heat, slowing down the rate at which it enters the interior space. This is ideal for lightweight building structures, such as timber and steel frame, where protection against solar gain is at a minimum.
Not only does this reduce energy bills by minimising the need for air conditioning during the summer months, it dramatically improves the thermal comfort of the building, improving lifestyle and wellbeing.
So there you have it! Wood Fibre is a remarkable insulation material that can offer a building many of its numerous advantages. We’ve previously written a blog all about our Wood Fibre insulation so for more information check that out, or if you’re looking to compare Wood Fibre with our other insulation materials then have a read of our blog post ‘the best type of insulation for EWI?’.
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