Insulating basement wall with dimple mat and French drain – GreenBuildingAdvisor

Hi,

I am looking to partially finish my basement which already has a french drain with a dimple mat up the wall in place which leads to a sump pump.

This is a fieldstone foundation with double wythe brick walls.

My question now is how to best insulate everything and tie this together with some insulation.

1. Do I seal the top of the dimple mat with some low expansion spray foam

2. Do I still need some sort of vapor retardant ? I don’t think spray foam is in the budget but was thinking using un-laminated eps board

The issue with that would be that the dimple mat is not super straight as comared to a concrete wall and wondering if that poses any issue

3. My understanding is that poly is a no go with this foundation in particular

I am looking at a design roughly like the one attached