I have had a recurring problem with a crack in the wall. I decided to strip it right back and came across this in the wall pictured below. It is dark grey and kind of spongy and can be cut with a stanley knife quite easily as seen by the marks on it. Maybe a finger wide.
I cut a little piece out to see what it's like. Its not actually that spongy but does have a bit of give. Breaks apart easily enough with my hand.
I cut a little piece out to see what it's like. Its not actually that spongy but does have a bit of give. Breaks apart easily enough with my hand.
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