Went up my attic because I was hearing some random sounds at night, and came across these beams pulling off nails? Is this normal, or should I do something about this? (Pics in body) https://files.catbox.moe/f32j05.jpg https://files.catbox.moe/lsi2fh.jpg https://files.catbox.moe/3kktlv.jpg https://files.catbox.moe/5m1j31.jpg https://files.catbox.moe/2biy91.jpg