Hi there,

My recently purchased 1960's property has a number of cracked sub-floor joists. A pre-inspection builders report, and a subsequent visit by same builder says the cracks are normal for rimu timber and it's not a problem. I'm not so sure. The damaged joists typically look like the one in the picture, some are worse. The bearers are steel I-beams on concrete foundations. They look fine.

The arrow indicates a gap above the joist between it and the partition wall above, which is essentially being supported only at its ends. I'd appreciate any comments.

Thanks.