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Guides and articles covering wall insulation broadly, including comparisons, material selection and general wall insulation principles.
Overheating in well-insulated homes is a growing issue in the UK, and one that catches many homeowners and builders off guard. As the climate shifts and sharp heat events become more frequent, the assumption that good insulation equals a comfortable…
PAS 2035 is the government-backed framework that sets out how retrofit projects in the UK should be planned, delivered, and overseen. Introduced to address the well-documented failures of earlier retrofit programmes, it establishes a structured process that runs from the…
In this episode of Can I Just Ask…, we take on a question we hear a lot from people using natural materials: does wood fibre internal wall insulation improve indoor air quality? The honest answer is indirectly, yes — but…
The single most important principle when preparing a wall for internal wall insulation is achieving continuous contact between the back face of the insulation and the wall surface — no voids, no bridged gaps, no variable depths that leave sections…
The short answer to whether wood fibre insulation can be applied to wet walls is no — and understanding why matters as much as the answer itself. Wood fibre does genuinely useful things with moisture: it buffers it, redistributes it,…
One of the more practical concerns people have about internal wall insulation is what they can do with the surface afterwards — and the answer is more flexible than most expect. For both direct-plastered wood fibre systems and NatureWall, the…
NatureWall was developed to bring the performance benefits of wood fibre internal wall insulation into contexts where conventional wet-trade systems are impractical — larger schemes, commercial projects, or any situation where the priority is speed, mainstream contractor compatibility, and dry…
Decrement delay describes the way a building’s fabric slows and reduces the transfer of heat from the outside to the inside — and it’s becoming an increasingly important concept as summer overheating replaces winter heat loss as the more pressing…
Psi values — written as the Greek letter ψ — are a measure of linear heat loss at junctions: the additional heat that escapes specifically at the edges and corners of a building, around window apertures, at floor-wall connections, and…
Clay plaster is the preferred substrate for BTE’s internal wall insulation systems, and the reasons stack up across performance, embodied carbon, and practicality. The fundamental goal when fixing insulation boards to an existing wall is achieving full, continuous contact with…