What’s your Attic Temp? (Trying to decide on going from R19 to R49)

launboy · 01-24-21, 11:31 AM

Winter here in Wisconsin and my attic temp is measuring 15*F above outdoor temp on average with no snow on the roof, and now with some snow last night I’m seeing 20*F above outdoor.

I’ve got R19 fiberglass batt parallel with trusses now. Trying to decide if I’ll see the payback on bringing it up to the code R49 for my area.

15-20* above outdoor means my attic is above freezing which means melting and ice dams in gutters. If adding insulation brings attic temp below freezing it’s a win win energy savings and no ice.

Anyone else measure attic temp or have experience with this sort of improvement?

01-24-21, 11:31 AM	#1
launboy Apprentice EcoRenovator Join Date: Mar 2011 Location: SE Wisconin Posts: 107 Thanks: 3 Thanked 11 Times in 9 Posts	What’s your Attic Temp? (Trying to decide on going from R19 to R49) Winter here in Wisconsin and my attic temp is measuring 15F above outdoor temp on average with no snow on the roof, and now with some snow last night I’m seeing 20F above outdoor. I’ve got R19 fiberglass batt parallel with trusses now. Trying to decide if I’ll see the payback on bringing it up to the code R49 for my area. 15-20* above outdoor means my attic is above freezing which means melting and ice dams in gutters. If adding insulation brings attic temp below freezing it’s a win win energy savings and no ice. Anyone else measure attic temp or have experience with this sort of improvement? Last edited by MetroMPG; 02-26-21 at 07:36 AM.. Reason: (added info to title)