Insulating concrete basement walls with closed cell spray foam – GreenBuildingAdvisor

If you wanted to see BSC’s ‘baseline’ wall, see:

BSD-103: Understanding Basements

https://www.buildingscience.com/documents/digests/bsd-103-understanding-basements

I would recommend *against* putting wood against the concrete basement foundation–it both puts potentially vulnerable wood in contact with damp concrete, and adds thermal bridging to the assembly. In essence, taking the most expensive insulation we commonly use (ccSPF), and substantially reducing its R value.

BSI-005: A Bridge Too Far

https://www.buildingscience.com/documents/insights/bsi-005-a-bridge-too-far

BSD-011: Thermal Control in Buildings

https://buildingscience.com/documents/digests/bsd-011-thermal-control-in-buildings

In terms of “thin” ccSPF assemblies that I would recommend–this is a set of plastic stand-offs that have minimal thermal bridging, but keep the wall assembly pretty thin:

X-Bracket System for Basements and Concrete Walls

https://www.insofast.com/x-bracket-system/basement

And these are recycled PVC stud or Z furring systems that are moisture-insensitive, have minimal thermal bridging, and work with basement interior ccSPF. However, I’m wondering if they have gone under, given that I can’t find their website now.

Resin Studs

https://www.jlconline.com/products-tools/resin-studs_o/