The magic of wool in the built environment

These benefits, he says, are in stark contrast to the synthetic or petroleum-based textiles often used in place of wool as construction materials — which are more toxic, less fire resistant, generally non-biodegradable and difficult to dispose of.

Wool insulation is not just good for acoustics; it also performs well thermally too. Owing to its exceptional breathability, it’s also effective at absorbing and releasing moisture without reducing thermal performance.

Depending on the relative humidity of its environment, wool can carry a moisture weight content of up to 35%. While absorbing this moisture, the wool releases energy in the form of heat, raising the temperature of surrounding areas — and the process is reversed in warmer weather, creating a cooling effect when it releases the moisture.

And Stephen says that these effects aren’t just relevant for in-wall wool insulation. “These properties are present in any woollen product in the home — whether it’s a sofa or a lampshade,” he says. “They will help in acoustic absorption, VOC absorption, moisture regulation — all in addition to their regular function.”

Despite all these advantages, Stephen says advocates for wool, both inside and outside of the construction industry, have their work cut out for them to change the popular perception of the material in relation to its synthetic counterparts.

Synthetic carpet, for example, is a cheaper, more common and accessible product, and is often the default option. But compared to wool, it’s simply not sustainable, Stephen says: it’s not biodegradable, and the raw materials used in its manufacturing are less than friendly to the environment.

“Thankfully, we’re seeing a bit of a wool resurgence,” says Stephen. “This comes down to a variety of factors, but I think a main one is the increased responsibility of designers and architects to champion products that are good for the environment. And of course, the desire of end-users to live a more sustainable life.”

But aside from all the technical benefits that wool offers, Stephen says its most endearing and enduring aspect is the way wool products make a room feel.

“If you’ve got a fully woollen carpet, for example, it really changes the feel of the room,” he says. “When people walk into our office, often they’ll remark how cosy and welcoming it feels.

“There’s a softness and comfort in wool. And for many people, that feeling alone is enough to convert them.”

Learn more about the Campaign for Wool.