Joist cavity insulation https://image.nostr.build/0d845e1bd61f2ec3ee80014df7f5eb33542d1a4f09a16bd86ba9bc64dc5df44c.jpg https://image.nostr.build/bd4a864bbdf40a8830b1368b0c4699a9c60fad0c9aa5fda5879d0037dc3ca8ac.jpg https://image.nostr.build/e8952d43e81a9800c546d4787f5edbb7f2d4ba1539a5eff54915586cfda15975.jpg