Fine cracks in new plaster skim coat

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22 Dec 2025
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Plasterers have done a nice job so far, but I noticed several hairline cracks at joint locations at door headers. 1/2” blueboard plaster base over 2x4 framing @16” centers that was framed just over two years ago. The joints that cracked were all at seams on cripple studs that are only 5”long between double header and double top plate, so the framing is robust. House temp is as kept at 58-60 degrees Fahrenheit as per the Plaster’s request, and humidity is around 50-55% prior to application of plaster.
Is this a minor issue I shouldn’t be concerned with or something that I should expect the plasterer to address?
Thank you, Daniel
 

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