Attic Insulation - How Much Do You Need?: Learn How Much Insulation is Recommended for Your Attic to Lower Energy Costs in Winter and Summer

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Sheetal Werneke
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Q:

I am looking to add insulation to my attic.  www.owenscorning.com recommends R-49, however the closest I can find is R-38 and that's 12 inches thick which almost doubles the height of my rafters.  I currently have 3 inches of blown insulation in my attic. Is it ok to go higher than my rafters?  If so, how do I walk through my attic without being able to see my rafters?