Natural Insulation

Natural insulation materials require careful specification to maintain thermal performance, moisture balance and long-term durability. Bio space has a range of breathable, natural insulation materials including wood fibre boards, cork, sheep wool and hemp, with bulk insulation purchasing options available for larger projects. Correct installation and detailing are essential to minimise air gaps and cold bridging, while maintaining vapour permeability. Breathable insulation can be complemented with recycled foam glass for load-bearing or insulating sub-base applications and finished with compatible natural hydraulic lime products to ensure a consistent, breathable build-up.

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Frequently asked questions
What are the benefits of natural insulation?

Natural insulation materials such as wood fibre, sheep’s wool and hemp provide strong thermal performance while supporting moisture movement through the building fabric. When correctly specified, they help reduce heat loss and improve energy efficiency.
Are natural insulation materials environmentally friendly?

Materials such as sheep’s wool and hemp are renewable and have low embodied energy compared to synthetic alternatives. They can also support carbon storage within the building fabric, contributing to more sustainable construction.
What thermal performance can be expected from natural insulation systems?

Products such as wood fibre typically achieve thermal conductivity values around 0.038 to 0.040 W/m·K, comparable to many conventional insulation materials. Performance will vary depending on specification, thickness and installation quality.
What should be considered during installation?

Installation of eco-friendly insulation should always follow manufacturer guidance, with close attention given to fixing methods, board joints and continuity. Poor detailing can introduce air gaps and cold bridging, reducing overall thermal performance.
Why is vapour permeability important in insulation systems?

Vapour permeability allows moisture to move through the building fabric rather than becoming trapped. When correctly detailed, this helps reduce the risk of condensation, decay and long-term damage.