Rigid Foam Board Insulation
Rigid foam board insulation — including XPS (extruded polystyrene), EPS (expanded polystyrene), and polyisocyanurate (polyiso) — provides continuous thermal protection for New Brunswick foundations, e
Find an Insulation ProAbout Rigid Foam Board Insulation
Rigid foam board insulation — including XPS (extruded polystyrene), EPS (expanded polystyrene), and polyisocyanurate (polyiso) — provides continuous thermal protection for New Brunswick foundations, exterior walls, and under-slab applications where moisture resistance and high compressive strength are essential.
XPS boards rated at R-5 per inch are the standard choice for NB below-grade foundation insulation because they resist moisture absorption even when in direct contact with damp soil and groundwater, maintaining their R-value where fibreglass and cellulose would fail.
Rigid foam installed as continuous exterior sheathing on NB homes eliminates the thermal bridging through wood studs that reduces effective wall R-value by 15-25%, a performance gap that becomes significant during the province's 5,000+ heating degree day winters.
What's Included
- XPS, EPS, and polyiso board options for above-grade and below-grade applications
- Moisture-resistant performance for NB foundation walls and high water table conditions
- Thermal bridging elimination when installed as continuous exterior sheathing
- High compressive strength for under-slab and below-grade foundation applications
- Compatible with ICF (insulated concrete form) foundation systems
- Long-term R-value stability without settling or moisture degradation
Ready to Get Started?
Contact us today for a free estimate on your rigid foam board insulation project. We'll connect you with experienced insulation contractors in New Brunswick.