Because many production builders don’t give a rats ass about fungi on framing members. I don’t know what new construction looks like where you guys live, but in my area roof trusses often have fungi growth and the same with I-joists in crawlspaces. If there is only fungi on framing members here or there? You’d have to break their arm or leg to get them to do remediation. Now, if the fungi growth is so widespread that you’re seeing the 7 colors of the rainbow throughout the attic or crawlspace? You’d have a better chance of getting the builder to remediate.
I remember one new construction several years ago where a few roof trusses were clearly left exposed to water for way too long that I could put my screwdriver right through the web/chords. Of course, the rotted trusses were installed without a second thought by the truss guys.
Not near salt water. The builder sprayed bleach and Sodium hydroxide solution on the whole house, but didn’t follow the manufacturer’s instruction to wash the metal part after spraying. The solution has been on the connector plates and other nails for one year- this might be the reasons.
I still cannot confirm if these galvanized connector plates are corroded.
Have you seen corrosion like these happening on galvanized connector plates?