Pressure treated lumber - Skylight curbs


Old 03-09-18, 10:20 AM
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Pressure treated lumber - Skylight curbs

My builder ran short on 2x4s (because they thought the subfascia was supposed to be 2x6) and therefore had to use some leftover pressure treated lumber to build the skylight curbs. They used regular 16D coated sinkers to nail the curbs to the roof sheathing. Are the nails going to corrode over time and cause issues or is this only a concern for load bearing exterior connections? The ceiling has yet to be sheerocked, and I haven't paid them yet, so it would be all on them to fix it if need be. Come to think of it, maybe they intentionally used PT lumber, but that would be surprising.
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Old 03-09-18, 10:31 AM
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Not sure I'd trust sinkers in PT wood. Doubt I'd go to the trouble of removing them but would add some galvanized nails.
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