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Insulation Codes For Baltimore

Some may wonder what the insulation codes are for us here locally in Baltimore. So, we have put together a simple chart to give us that information. The codes in the each county in the state of Maryland are all the same , minus one- Garrett County.

Ceiling R-value 38
Wood Frame Wall R-value 13
Mass Wall R-value i 5/10
Floor R-value 19
Basement Wall R-value c 10/13
Slab R-value d, Depth 10, 2 ft
Crawlspace Wall R-value c 10/13
Fenestration U-Factor b 0.35
Skylight U-Factor b 0.60
long red brick road, showing community in baltimore
  1. R-values are minimums. U-factors and SHGC are maximums. R-19 batts compressed into a nominal 2×6 framing cavity such that the R-value is reduced by R-1 or more shall be marked with the compressed batt R-value in addition to the full thickness R-value.
  2. This table applies to single-family, wood frame residential construction.
  3. Floors over outside air must meet ceiling requirements.
  4. R-values for walls represent the sum of cavity insulation plus insulated sheathing, if any.
  5. Basement Wall Insulation is not required in warm-humid locations.
This information has been provided from the IECC Climate Zone Map that you can find here.


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