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Silicone render is a polymer-based finish coat applied over a lime basecoat that combines two properties which are difficult to achieve simultaneously in traditional materials: strong water repellency and good vapour permeability. It keeps liquid water from penetrating the surface…
Wood fibre is a timber-based material and it does burn — that much is straightforward. What’s less well understood is how it burns and what that means in practice. In complete combustion, wood fibre produces very few harmful by-products and…
The question of whether an approved installer is necessary is one that comes up regularly, and the honest answer is more nuanced than a simple yes or no. Many manufacturers run their own training schemes and approved installer programmes, but…
Natural ventilation is intuitively appealing — fresh air coming in through open windows and trickle vents, no mechanical systems, no noise, nothing to maintain. The reality of relying on it as a serious strategy is considerably less comfortable. In practice,…
Partially insulating a building is technically possible, and for projects that need to be phased over time a staged approach can be made to work — but it comes with genuine risks that are worth understanding before committing to it.…
The question of why we insulate is rarely one that reaches BTE directly — most people have already decided they want to by the time they make contact — but the full picture is worth laying out clearly because the…
Plasterboard has something of an image problem in natural building circles, and it’s largely undeserved. Gypsum — the core material in plasterboard — is a naturally occurring mineral that requires very little processing: it’s extracted from the ground, dried at…
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At the beginning of 2024 we started working with a new wood fibre insulation manufacturer in Germany, called NaturHeld (NatureHero in English), part of a group of companies that work in the timber industry. Early purchases confirmed the quality of…
Our free online training website Fibres is getting an update! Initially a proof-of-concept and hub for designers and installers using wood fibre insulation, Fibres was created in 2019 to allow anyone, regardless of skill level, fully understand wood fibre insulation.…
One common concern when using wood fire insulation is that because it is made of wood it might not be safe from a fire perspective. In this article we show how to use wood fibre insulation in fire safe constructions…
We’re always on the lookout for design tools, links and expert insights we can use to help our clients build sustainably with confidence. Here we’ve included a categorised list of everything we’ve come across so far. We’ll continue to update…