I'm sure (not the real)fred will be along soon to tell me that if I have to ask then I'm not safe to have one(but I won't see him unless I go ferreting in the killfile), but I'm curious.
To protect the end of the joist from woodrot/damp when recessing a joist in the brickwork?
Correct.
Some BCO's insist on coating the joist ends in silicone or mastic, although I have never met one that has mentioned it. These cover the entire joist end eliminating the need for messy sealants, personally I use hangers and I've never been pulled on them yet.
The message from Guy King contains these words:
Too late - I found out!
I'm relieved to see its NOT a link to a pic of a wirecutter like device with 2 largish cutting holes side by side.
NT
Saw these about a year ago. Seem like a good method of sound insulation for floors??
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