Internal Wall Insulation (IWI)

Levelling
Baumit Klima RK38Supplier
Mike Wye (and others)

A premixed natural hydraulic lime plastering mortar for internal applications on all types of masonry. suitable as a base-coat render, a dubbing coat before the application of wood fibre insulation boards.

Diasen Diathonite ThermactiveSupplier
Ecological building systems (and others)

A cork-lime insulating levelling plaster for uneven stone or masonry walls. Typically 30mm

Internal Wall Insulation
Use bonding as recommended by insulation supplierSupplier
Steico Therm (SE): 20/40/60/80 mm thickSupplier
Ecomerchant (and others)

Easy and fast-fixing wood fibre board with superior insulating properties in both summer and winter. High compressive strength, water vapour open (helps regulate the indoor climate of a building), fire resistant.

Gutex Thermoroom: 40/60/80/100 mm thickSupplier
Ecological building systems (and others)

Fully breathable insulation board. It can be used as a high-performance interior insulation system on solid masonry external walls. It provides excellent thermal insulation in Winter and prevents overheating in Summer.

Redstone Calsitherm Climate Board (used with Calistherm Finishing plaster and mesh)Supplier
Ecological building systems (and others)

High-performance thermal insulation that provides a more comfortable indoor climate. Manages moisture, regulates humidity, eliminates mould and minimises heat-loss, especially in older or historic buildings or newer buildings suffering condensation and mould problems. Finish with only Calistherm Finishing plaster and mesh.

Plaster
Lime Green SoloSupplier
Ecological building systems (and others)

An internal lime plaster suitable for a wide range of surfaces, including wood-based panels, masonry and wood fibre insulation boards. It is highly breathable (vapour permeable) and can be finished to a smooth surface in just one coat.  

Breathaplasta UniversalSupplier
Ecomerchant (and others)

A quick setting two-coat bio-based breathable plaster. A versatile two-coat plaster that breathes life back into your building. It is proven to passively improve indoor air quality and reduce problems with mould and condensation.

Paint Finish
Lakeland Matt paintSupplier
Via Lakeland Paints

A breathable emulsion made without vocs

Baumit KlimaColor (Silikatin) PaintSupplier
Ecomerchant (and others)

Baumit Klima Silikatin is a vapour open, silicate-based, ecological paint for internal use, offering high covering power. Baumit Klima Silikatin contains no preservatives or solvents and is amine-free and ammoniac-free. The paint is certified as very low emissions and not harmful to the environment or human health.