Our new home (1 story ranch with full walkout basement) was frame built in 2004-05. We've had cold weather before and never had the popping noises in the attic that we have this year. It has been a wet year here in West-Central Missouri and last year, I added blow-in insulation of about another 4 inches on top of R-30 bats that were installed before the sheetrock went up. The popping just started yesterday evening but continued through the night & is doing it again some this morning. We had sunshine yesterday & today so far same; but temps are down to 12 at night. Any comments?

Heat and cold can cause expansion and contraction. I believe water expands about 11% when frozen.

Do you have overhead water piping in you attic? Regards, Tom

Your daily temps range over 100 degree during the year, you will hear popping in the attic from the plywood decking expanding/contracting and moving the rafters.