Yes, IKO enertherm PIR insulation can be used for insulating foundations, provided that the boards are properly protected against groundwater.
PIR insulation is not waterproof and loses its thermal and mechanical performance when exposed to moisture for extended periods. Therefore, it is essential to apply a bituminous waterproofing layer (single- or double-layer) on top of the insulation.
Since foundation insulation is installed vertically, mechanical fastening of the waterproofing is necessary to prevent detachment.
Conclusion: PIR is suitable for foundation insulation, as long as it is correctly protected and secured. For proper system design and product selection, please contact your IKO representative.
