foundation insulation or drainage board or expansion material

[Jeff Zehnder]

Ran into this on foundation walls and retaining walls on recent new home inspection.
Anyone have any ideas what this is?
I looks a little like insulting duct material, it is fibrous??

Photo shows retaining wall

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[Fred Weck]

It's Tuff-n-dri; it's an insulation and a part of a foundation waterproofing system. It acts as a drainage plane.

[Mark Reinmiller]

It's Tuff-n-dri; it's an insulation and a part of a foundation waterproofing system. It acts as a drainage plane.

I believe the manufacturer considers it a drainage plane, insulation, and a protective covering for the water-proofing.

[Harry Janssen]

It acts as all of the above,works well.

[Jeff Zehnder]

I attempted to find out information on the brand mentioned but none of their product has the fibrous look and characteristic of the materials in my post??

[Mark Reinmiller]

I attempted to find out information on the brand mentioned but none of their product has the fibrous look and characteristic of the materials in my post??

I can't tell from the photo what the material is. Tuff-N-Dri or others I have seen use rigid fiberglass. Was it different from that?

[Mike Kleisch]

This might help, sometimes it might be more white looking, probably depends on who makes it. But, this is a fiberglass type 4'x4' (Warm-N-Dri) board material, think from Owens Corning, the pink people...