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Equilibrium Moisture Content (EMC) of Wood

 

 

 

 

 

 


Equilibrium moisture content of wood exposed to outdoor atmosphere, in several U.S. locations in 1997

see US Moisture Map

Equilibrium moisture content a (%)

State

City

Jan.

Feb.

Mar.

Apr

May

June

July

Aug

Sept

Oct

Nov

Dec

AK

Juneau

16.5

16.0

15.1

13.9

13.6

13.9

15.1

16.5

18.1

18.0

17.7

18.1

AL

Mobile

13.8

13.1

13.3

13.3

13.4

13.3

14.2

14.4

13.9

13.0

13.7

14.0

AZ

Flagstaff

11.8

11.4

10.8

9.3

8.8

7.5

9.7

11.1

10.3

10.1

10.8

11.8

AZ

Phoenix

9.4

8.4

7.9

6.1

5.1

4.6

6.2

6.9

6.9

7.0

8.2

9.5

AR

Little Rock

13.8

13.2

12.8

13.1

13.7

13.1

13.3

13.5

13.9

13.1

13.5

13.9

CA

Fresno

16.4

14.1

12.6

10.6

9.1

8.2

7.8

8.4

9.2

10.3

13.4

16.6

CA

Los Angeles

12.2

13.0

13.8

13.8

14.4

14.8

15.0

15.1

14.5

13.8

12.4

12.1

CO

Denver

10.7

10.5

10.2

9.6

10.2

9.6

9.4

9.6

9.5

9.5

11.0

11.0

DC

Washington

11.8

11.5

11.3

11.1

11.6

11.7

11.7

12.3

12.6

12.5

12.2

12.2

FL

Miami

13.5

13.1

12.8

12.3

12.7

14.0

13.7

14.1

14.5

13.5

13.9

13.4

GA

Atlanta

13.3

12.3

12.0

11.8

12.5

13.0

13.8

14.2

13.9

13.0

12.9

13.2

H I

Honolulu

13.3

12.8

11.9

11.3

10.8

10.6

10.6

10.7

10.8

11.3

12.1

12.9

I D

Boise

15.2

13.5

11.1

10.0

9.7

9.0

7.3

7.3

8.4

10.0

13.3

15.2

IL

Chicago

14.2

13.7

13.4

12.5

12.2

12.4

12.8

13.3

13.3

12.9

14.0

14.9

I N

Indianapolis

15.1

14.6

13.8

12.8

13.0

12.8

13.9

14.5

14.2

13.7

14.8

15.7

IA

Des Moines

14.0

13.9

13.3

12.6

12.4

12.6

13.1

13.4

13.7

12.7

13.9

14.9

KS

Wichita

13.8

13.4

12.4

12.4

13.2

12.5

11.5

11.8

12.6

12.4

13.2

13.9

K Y

Louisville

13.7

13.3

12.6

12.0

12.8

13.0

13.3

13.7

14.1

13.3

13.5

13.9

LA

New Orleans

14.9

14.3

14.0

14.2

14.1

14.6

15.2

15.3

14.8

14.0

14.2

15.0

ME

Portland

13.1

12.7

12.7

12.1

12.6

13.0

13.0

13.4

13.9

13.8

14.0

13.5

MA

Boston

11.8

11.6

11.9

11.7

12.2

12.1

11.9

12.5

13.1

12.8

12.6

12.2

MI

Detroit

14.7

14.1

13.5

12.6

12.3

12.3

12.6

13.3

13.7

13.5

14.4

15.1

MN

Minneapolis–St.Paul

13.7

13.6

13.3

12.0

11.9

12.3

12.5

13.2

13.8

13.3

14.3

14.6

MS

Jackson

15.1

14.4

13.7

13.8

14.1

13.9

14.6

14.6

14.6

14.1

14.3

14.9

MO

St. Louis

14.5

14.1

13.2

12.4

12.8

12.6

12.9

13.3

13.7

13.1

14.0

14.9

MT

Missoula

16.7

15.1

12.8

11.4

11.6

11.7

10.1

9.8

11.3

12.9

16.2

17.6

NE

Omaha

14.0

13.8

13.0

12.1

12.6

12.9

13.3

13.8

14.0

13.0

13.9

14.8

NV

Las Vegas

8.5

7.7

7.0

5.5

5.0

4.0

4.5

5.2

5.3

5.9

7.2

8.4

NV

Reno

12.3

10.7

9.7

8.8

8.8

8.2

7.7

7.9

8.4

9.4

10.9

12.3

NM

Albuquerque

10.4

9.3

8.0

6.9

6.8

6.4

8.0

8.9

8.7

8.6

9.6

10.7

N Y

New York

12.2

11.9

11.5

11.0

11.5

11.8

11.8

12.4

12.6

12.3

12.5

12.3

N C

Raleigh

12.8

12.1

12.2

11.7

13.1

13.4

13.8

14.5

14.5

13.7

12.9

12.8

ND

Fargo

14.2

14.6

15.2

12.9

11.9

12.9

13.2

13.2

13.7

13.5

15.2

15.2

OH

Cleveland

14.6

14.2

13.7

12.6

12.7

12.7

12.8

13.7

13.8

13.3

13.8

14.6

OK

Oklahoma City

13.2

12.9

12.2

12.1

13.4

13.1

11.7

11.8

12.9

12.3

12.8

13.2

OR

Pendleton

15.8

14.0

11.6

10.6

9.9

9.1

7.4

7.7

8.8

11.0

14.6

16.5

OR

Portland

16.5

15.3

14.2

13.5

13.1

12.4

11.7

11.9

12.6

15.0

16.8

17.4

PA

Philadelphia

12.6

11.9

11.7

11.2

11.8

11.9

12.1

12.4

13.0

13.0

12.7

12.7

SC

Charleston

13.3

12.6

12.5

12.4

12.8

13.5

14.1

14.6

14.5

13.7

13.2

13.2

SD

Sioux Falls

14.2

14.6

14.2

12.9

12.6

12.8

12.6

13.3

13.6

13.0

14.6

15.3

TN

Memphis

13.8

13.1

12.4

12.2

12.7

12.8

13.0

13.1

13.2

12.5

12.9

13.6

TX

Dallas–Ft.Worth

13.6

13.1

12.9

13.2

13.9

13.0

11.6

11.7

12.9

12.8

13.1

13.5

TX

El Paso

9.6

8.2

7.0

5.8

6.1

6.3

8.3

9.1

9.3

8.8

9.0

9.8

UT

Salt Lake City

14.6

13.2

11.1

10.0

9.4

8.2

7.1

7.4

8.5

10.3

12.8

14.9

VA

Richmond

13.2

12.5

12.0

11.3

12.1

12.4

13.0

13.7

13.8

13.5

12.8

13.0

WA

Seattle–Tacoma

15.6

14.6

15.4

13.7

13.0

12.7

12.2

12.5

13.5

15.3

16.3

16.5

W I

Madison

14.5

14.3

14.1

12.8

12.5

12.8

13.4

14.4

14.9

14.1

15.2

15.7

WV

Charleston

13.7

13.0

12.1

11.4

12.5

13.3

14.1

14.3

14.0

13.6

13.0

13.5

W Y

Cheyenne

10.2

10.4

10.7

10.4

10.8

10.5

9.9

9.9

9.7

9.7

10.6

10.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

aEMC values were determined from the average of 30 or more years of relative humidity and temperature data available from the National Climatic Data Center of the National Oceanic and Atmospheric Administration.

 



Related Pages:

Acclimation of Wood Floors

Builders Checklist before Installing

Consumer Help-Avoid Trouble- Moisture Related Concerns

Flooded Wood Floors
Grade Level- Above & Below Installation

Installation & Finishing Procedures

Job Conditions

Maintenance

Moisture Problems-Checklist
New Home & Wood Floors

Sources of Moisture

Sub-floors - Suspended and Moisture Barriers

Testing for Moisture

Troubleshooting Moisture for the Flooring Contractor

Water and Wood Floors

Wood Floors and water-flooded floors

 		 

 

 

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