The roof was added about 5 years ago. I’m not for sure if the sky light was added then or not. Is the metal flap on the top installed correctly here? I didn’t know, or couldn’t tell, if there was an underneath flashing and this visible one just set on top or if in fact this one was suppose to go under the shakes. I didn’t see any evidence of moisture staining on the sheetrock in the house or the wood structure in the attic. Thanks.