Wood fibre insulation boards:
Lambda value: 0.038 to 0.050 W/(m-K)
Wood fibre insulation boards are an ecological insulation material made from renewable raw materials. They provide good thermal insulation, are open to diffusion and can regulate moisture. However, they are usually less pressure-resistant than synthetic insulation materials.
Lambda value: 0.035 to 0.040 W/(m-K)
Cellulose insulation is made from recycled newspaper and can be used in board form or blown in loose. It provides good thermal insulation and is environmentally friendly, but is less suitable for perimeter insulation as it is susceptible to moisture.
Calcium silicate boards:
Lambda value: 0.050 to 0.070 W/(m-K)
Calcium silicate boards are a mineral insulation material used for interior applications to prevent condensation and mould growth. They can also be used for perimeter insulation, but have a higher thermal conductivity than other insulation materials and are less efficient.
Lambda value: 0.040 to 0.060 W/(m-K)
Perlite is a mineral insulation material extracted from volcanic rock. It is moisture-resistant, non-combustible and environmentally friendly. However, the thermal insulation performance of perlite is lower than most other perimeter insulation materials.
It is important to note that the actual insulation performance of a material depends on the quality and thickness of the insulation material, as well as on correct installation and processing. The choice of the right perimeter insulation material depends on various factors, such as climate, soil conditions, groundwater level, building physics requirements and budget. It is advisable to consult an expert to find the best solution for the project in question.
*What is the lambda value for perimeter insulation? What is measured?
The lambda value in perimeter insulation refers to the thermal conductivity of the insulation material used to insulate the building perimeter wall. The lambda value is a measure of the material's ability to conduct heat and indicates how much heat is conducted through the material.
A low lambda value means that the insulation material has a lower thermal conductivity and thus insulates better. A high lambda value, on the other hand, indicates that the material has a higher thermal conductivity and thus insulates worse.
When choosing insulation material for perimeter insulation, it is important to choose a material with the lowest possible lambda value to ensure effective thermal insulation. A low lambda value leads to lower heat losses and thus lower heating costs in winter and a cooler interior in summer.
In addition to lambda value, there are other parameters that need to be considered when choosing the right insulation material for perimeter insulation, such as the thickness and compressive strength of the material.