What is this underlay in closet floor? Help, advice, information, answers and tips on all types of flooring from laminate and carpet to timber and vinyl

[markusb]

Hi there,

Moved into flat and discovered this patch (see photo) of spongy material with a thin wooden border, under the floor covering. It covers the floor in a small room/closet. Does anyone know what that was for? Can I remove it or scrape it off?

Thank you.

[stoneyboy]

Hi markusb,
You have found standard carpet underlay with carpet gripper around the edges. It was probably Tredaire or something similar but both carpet and gripper have been wet for a long time.
Regards S

[markusb]

Very helpful, thank you!