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Building Basics
Basement Slab Insulation Edge


Along with a sloping grade and waterproofed foundation walls, the foundation slabs need to be properly insulated in order to protect the foundation.


Poorly insulated foundation slabs can present several problems involving:

  • Energy loss 
  • Moisture control
  • Indoor air quality

Properly install rigid insulation that extends to the top of the slab in either a monolithic slab with a grade beam or a slab independent of the foundation design. 

  • Make sure the insulation is approved for below-grade use 
  • Review the plan for slab insulation with pest control and local building officials to achieve compliance
  • Confirm that insulation levels meet or exceed state and IECC requirements