Insulating basement wall
Hello all, looking for some input on insulating my basement. Home is new construction in New Jersey, and builder installed a drain channel? around the perimeter of the basement – 1/2 thick dimples off the wall and goes up the wall 2-3 inches. What are my best options for insulating? Township requires R15 total insulated value.
1. Install dimple membrane on entire wall surface, then 2″ Foamboard over membrane, then and regular batt insulation between stud wall
2. Frame the basement 6+ inches off the exterior walls and use regular batt insulation
3. Foambard flush to wall and stop at top of drain channel
Ruling out spray foam as the cost will likely be out of budget to do 1,200 sq ft.
Your guidance is much appreciated!
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