Table 1 Changes in Standard for the Energy-saving Design of domestic new buildings_U-values of building parts by region (Unit: W/㎡K)

Time of revision		Wall			Roof			Floor			Window
		Central	Southern	Jeju	Central	Southern	Jeju	Central	Southern	Jeju	Central	Southern	Jeju
Sep. 15, 1979 -Dec. 31, 1980		1.05			1.05			1.05			Double-glazed window
Jan. 1, 1981 -Mar. 26, 1984		0.58			0.58			1.16			3.49 or double-glazed window
Mar. 27, 1984 -Jul. 20, 1987		0.58		1.16	0.58		1.16	0.58		1.16	3.49 or double-glazed window
Jul. 21, 1987 - Jan. 16, 2001		0.58	0.76	1.16	0.41	0.52	0.76	0.58	0.76	1.16	3.37	3.60	5.81
Jan. 17, 2001 - Jul. 9, 2008	Direct	0.47	0.58	0.76	0.29	0.35	0.41	0.35	0.41	0.47	3.84	4.19	5.23
	Ind.	0.64	0.81	1.10	0.41	0.52	0.58	0.52	0.58	0.64	5.47	6.05	7.56
Jul. 10, 2008 - Jan. 31, 2011	Direct	0.47	0.58	0.76	0.29	0.35	0.41	0.35	0.41	0.47	3.00(3.40)	3.30(3.80)	4.20(4.40)
	Ind.	0.64	0.81	1.10	0.41	0.52	0.58	0.52	0.58	0.64	4.30(4.60)	4.70(5.30)	6.00(6.30)
Feb. 1, 2011- Sep. 30, 2013	Direct	0.36	0.45	0.58	0.20	0.24	0.29	0.30	0.35	0.35	2.10(2.40)	2.40(2.70)	3.10(3.40)
	Ind.	0.49	0.63	0.85	0.29	0.34	0.41	0.43	0.50	0.50	2.80(3.20)	3.10(3.70)	3.70(4.30)
Oct. 1, 2013- Presenta)	Direct	0.27	0.34	0.44	0.18	0.22	0.28	0.23	0.28	0.33	1.50(2.10)	1.80(2.40)	2.60(3.00)
	Ind.	0.37	0.48	0.64	0.26	0.31	0.33	0.35	0.40	0.47	2.20(2.60)	2.50(3.10)	3.30(3.80)

a) From the 2008 Standard for Energy-saving Design, different standards of window were applied to MDU and buildings other than MDU. ( ) denotes a standard for buildings other than MDU.