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(Effective Until July 1, 2013.) WAC 51-11-1006	Agency filings affecting this section
Section 1006 Default U-factors for glazing and doors.

  


     1006.1 Glazing and Doors without NFRC Certification: Glazing and doors that do not have NFRC certification shall be assigned the following U-factors:

Vertical Glazing
	U-Factor
	Any Frame	Aluminum W/Thermal Break	Vinyl/Wood/ Fiberglass Frame
Single	1.45	1.45	1.45
Double	0.90	0.85	0.75
1/2 Inch Air, Fixed/Operable	0.75/0.90	0.70/0.84	0.60/0.72
1/2 Inch Air, Low-e(0.40), Fixed/Operable	0.70/0.84	0.60/0.72	0.50/0.60
1/2 Inch Air, Low-e(0.10), Fixed/Operable	0.65/0.78	0.55/0.66	0.45/0.54
1/2 Inch Argon, Low-e(0.10), Fixed/Operable	0.60/0.72	0.50/0.60	0.40/0.48
Triple	0.75	0.55	0.50
1/2 Inch Air, Fixed/Operable	0.55/0.66	0.50/0.60	0.45/0.54
1/2 Inch Air, Low-e(0.20), Fixed/Operable	0.50/0.60	0.45/0.54	0.40/0.48
1/2 Inch Air, 2 Low-e(0.10), Fixed/Operable	0.45/0.54	0.35/0.42	0.30/0.36
1/2 Inch Argon, Low-e(0.10), Fixed/Operable	0.40/0.48	0.30/0.36	0.25/0.30

The category for aluminum frame with a thermal break is as defined in footnote 7 to Table 10-6A.

Overhead Glazing: Sloped Glazing (Including Frame)
	U-Factor
	Any Frame	Aluminum W/Thermal Break	Vinyl/Wood/ Fiberglass Frame
Single	1.74	1.74	1.74
Double	1.08	1.02	0.90
1/2 Inch Air, Fixed	0.90	0.84	0.72
1/2 Inch Air, Low-e(0.40), Fixed	0.84	0.72	0.60
1/2 Inch Air, Low-e(0.10), Fixed	0.78	0.66	0.54
1/2 Inch Argon, Low-e(0.10), Fixed	0.72	0.60	0.48
Triple	0.90	0.66	0.60
1/2 Inch Air, Fixed	0.66	0.60	0.54
1/2 Inch Air, Low-e (0.20), Fixed	0.60	0.54	0.48
1/2 Inch Air, 2 Low-e(0.10), Fixed	0.54	0.42	0.36
1/2 Inch Argon, 2 Low-e(0.10), Fixed	0.48	0.36	0.30

     This default table is applicable to sloped glazing only. (Sloped glazing is a multiple-lite glazed system (similar to a curtain wall) that is mounted at a slope greater than 15° from the vertical plane.) Other overhead glazing shall use the defaults in Table 10-6E.

Opaque Doors
	U-Factor
Uninsulated Metal	1.20
Insulated Metal (Including Fire Door and Smoke Vent)	0.60
Wood	0.50
Other Doors	See Table 10-6C

Notes:


Where a gap width is listed (i.e.: 1/2 inch), that is the minimum allowed.

Where a low-emissivity emittance is listed (i.e.: 0.40, 0.20, 0.10), that is the maximum allowed.

Where a gas other than air is listed (i.e.: Argon), the gas fill shall be a minimum of 90%.

Where an operator type is listed (i.e.: Fixed), the default is only allowed for that operator type. Where a frame type is listed (i.e.: Wood/vinyl), the default is only allowed for that frame type. Wood/vinyl frame includes reinforced vinyl and aluminum-clad wood.

Description1,2,3,4			Frame Type5,6
			Aluminum	Aluminum Thermal Break7	Wood/Vinyl
Windows	Single		1.20	1.20	1.20
	Double, < 1/2"	Clear	0.92	0.75	0.63
		Clear Argon	0.87	0.71	0.60
		Low-e	0.85	0.69	0.58
		Low-e Argon	0.79	0.62	0.53
	Double, > 1/2"	Clear	0.86	0.69	0.58
		Clear Argon	0.83	0.67	0.55
		Low-e	0.78	0.61	0.51
		Low-e Argon	0.75	0.58	0.48
	Triple,	Clear	0.70	0.53	0.43
		Clear Argon	0.69	0.52	0.41
		Low-e	0.67	0.49	0.40
		Low-e Argon	0.63	0.47	0.37
Garden	Single		2.60	n.a.	2.31
Windows	Double	Clear	1.81	n.a.	1.61
		Clear Argon	1.76	n.a.	1.56
		Low-e	1.73	n.a.	1.54
		Low-e Argon	1.64	n.a.	1.47

1	< 1/2" = a minimum dead air space of less than 0.5 inches between the panes of glass.
	> 1/2" = a minimum dead air space of 0.5 inches or greater between the panes of glass.
	Where no gap width is listed, the minimum gap width is 1/4".
2	Any low-e (emissivity) coating (0.1, 0.2 or 0.4).
3	U-factors listed for argon shall consist of sealed, gas-filled insulated units for argon, C02, SF6, argon/SF6 mixtures and Krypton.
4	"Glass block” assemblies may use a U-factor of 0.51.
5	Insulated fiberglass framed products shall use wood/vinyl U-factors.
6	Aluminum clad wood windows shall use the U-factors listed for wood/vinyl windows.
7	Aluminum Thermal Break = An aluminum thermal break framed window shall incorporate the following minimum design characteristics:

a)	The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/°F;
b)	The thermal break material must produces a gap in the frame material of not less than 0.210 inches; and,
c)	All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a) and b) above.

Vertical Glazing Description				Frame Type
				Any Frame	Aluminum Thermal Break2	Wood/Vinyl Fiberglass
Panes	Low-e1	Spacer	Fill
	A	Any	Argon	0.48	0.41	0.32
	B	Any	Argon	0.46	0.39	0.30
Double3	C	Any	Argon	0.44	0.37	0.28
	C	High Performance	Argon	0.42	0.35	Deemed to comply5
	A	Any	Air	0.50	0.44	0.26
	B	Any	Air	0.45	0.39	0.22
Triple4	C	Any	Air	0.41	0.34	0.20
	Any, double low-e	Any	Air	0.35	0.32	0.18

Footnotes to Table 10-6B

1.	Low-eA (emissivity) shall be 0.24 to 0.16.
	Low-eB (emissivity) shall be 0.15 to 0.08.
	Low-eC (emissivity) shall be 0.07 or less.
2.	Aluminum Thermal Break = An aluminum thermal break framed window shall incorporate the following minimum design characteristics:
	a) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/° F;
	b) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
	c) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a) and b) above.
3.	A minimum air space of 0.375 inches between panes of glass is required for double glazing.
4.	A minimum air space of 0.25 inches between panes of glass is required for triple glazing.
5.	Deemed to comply glazing shall not be used for performance compliance.

Door Type	No Glazing	Single Glazing	Double Glazing with 1/4 in. Airspace	Double Glazing with 1/2 in. Airspace	Double Glazing with e = 0.10, 1/2 in. Argon
SWINGING DOORS (Rough opening - 38 in. x 82 in.)
Slab Doors
Wood slab in wood framea	0.46
6% glazing (22 in. x 8 in. lite)	-	0.48	0.47	0.46	0.44
25% glazing (22 in. x 36 in. lite)	-	0.58	0.48	0.46	0.42
45% glazing (22 in. x 64 in. lite)	-	0.69	0.49	0.46	0.39
More than 50% glazing		Use Table 10-6A
Insulated steel slab with wood edge in wood framea	0.16
6% glazing (22 in. x 8 in. lite)	-	0.21	0.20	0.19	0.18
25% glazing (22 in. x 36 in. lite)	-	0.39	0.28	0.26	0.23
45% glazing (22 in. x 64 in. lite)	-	0.58	0.38	0.35	0.26
More than 50% glazing		Use Table 10-6A
Foam insulated steel slab with metal edge in steel frameb	0.37
6% glazing (22 in. x 8 in. lite)	-	0.44	0.42	0.41	0.39
25% glazing (22 in. x 36 in. lite)	-	0.55	0.50	0.48	0.44
45% glazing (22 in. x 64 in. lite)	-	0.71	0.59	0.56	0.48
More than 50% glazing		Use Table 10-6A
Cardboard honeycomb slab with metal edge in steel frameb	0.61
Style and Rail Doors
Sliding glass doors/French doors		Use Table 10-6A
Site-Assembled Style and Rail Doors
Aluminum in aluminum frame	-	1.32	0.99	0.93	0.79
Aluminum in aluminum frame with thermal break	-	1.13	0.80	0.74	0.63

a.	Thermally broken sill (add 0.03 for nonthermally broken sill)
b.	Nonthermally broken sill
c.	Nominal U-factors are through the center of the insulated panel before consideration of thermal bridges around the edges of the door sections and due to the frame.

REVOLVING DOORS
Size (W x H)	U-Factor
3-wing      8 ft. x 7 ft.      10 ft. x 8 ft.	0.79 0.80
4-wing      7 ft. x 6.5 ft.      7 ft. x 7.5 ft.	0.63 0.64
Open      82 in. x 84 in.	1.32

DOUBLE-SKIN STEEL EMERGENCY EXIT DOORS
Core Insulation	3 ft. x 6 ft. 8 in.	6 ft. x 6 ft. 8 in.
1-3/8 in. thickness      Honeycomb kraft paper      Mineral wool, steel ribs      Polyurethane foam	0.57 0.44 0.34	0.52 0.36 0.28
1-3/4 in. thickness      Honeycomb kraft paper      Mineral wool, steel ribs      Polyurethane foam	0.57 0.41 0.31	0.54 0.33 0.26
1-3/8 in. thickness      Honeycomb kraft paper      Mineral wool, steel ribs      Polyurethane foam	0.60 0.47 0.37	0.55 0.39 0.31
1-3/4 in. thickness      Honeycomb kraft paper      Mineral wool, steel ribs      Polyurethane foam	0.60 0.44 0.34	0.57 0.37 0.30

DOUBLE-SKIN STEEL GARAGE AND AIRCRAFT HANGAR DOORS
	One-piece tilt-upa		Sectional tilt-upb	Aircraft hangar
Insulatione	8 ft. x 7 ft.	16 ft. x 7 ft.	9 ft. x 7 ft.	72 ft. x 12 ft.c	240 ft. x 50 ft.d
1-3/8 in. thickness      EPS, steel ribs      XPS, steel ribs	0.36 0.33	0.33 0.31	0.34-0.39 0.31-0.36
2 in. thickness      EPS, steel ribs      XPS, steel ribs	0.31 0.29	0.28 0.26	0.29-0.33 0.27-0.31
3 in. thickness      EPS, steel ribs      XPS, steel ribs	0.26 0.24	0.23 0.21	0.25-0.28 0.24-0.27
4 in. thickness      EPS, steel ribs      XPS, steel ribs	0.23 0.21	0.20 0.19	0.23-0.25 0.21-0.24
6 in. thickness      EPS, steel ribs      XPS, steel ribs	0.20 0.19	0.16 0.15	0.20-0.21 0.19-0.21
4 in. thickness      Non-insulated      Expanded polystyrene      Mineral wool, steel ribs      Extruded polystyrene				1.10 0.25 0.25 0.23	1.23 0.16 0.16 0.15
6 in. thickness      Non-insulated      Expanded polystyrene      Mineral wool, steel ribs      Extruded polystyrene				1.10 0.21 0.23 0.20	1.23 0.13 0.13 0.12
Uninsulated      All products	1.15

a.	Values are for thermally broken or thermally unbroken doors.
b.	Lower values are for thermally broken doors; upper values are for doors with no thermal break.
c.	Typical size for a small private airplane (single-engine or twin).
d.	Typical hangar door for a midsize commercial jet airliner.
e.	EPS is extruded polystyrene, XPS is expanded polystyrene.

	Frame Type
	Aluminum	Aluminum	Reinforced	Wood or Vinyl-
	without	with	Vinyl/	Clad Wood/
	Thermal	Thermal	Aluminum-Clad	Vinyl without
Glazing Type	Break	Break	Wood or Vinyl	Reinforcing
Single Glazing
glass	U-1.58	U-1.51	U-1.40	U-1.18
acrylic/polycarb	U-1.52	U-1.45	U-1.34	U-1.11
Double Glazing
air	U-1.05	U-0.89	U-0.84	U-0.67
argon	U-1.02	U-0.86	U-0.80	U-0.64
Double Glazing, e = 0.20
air	U-0.96	U-0.80	U-0.75	U-0.59
argon	U-0.91	U-0.75	U-0.70	U-0.54
Double Glazing, e = 0.10
air	U-0.94	U-0.79	U-0.74	U-0.58
argon	U-0.89	U-0.73	U-0.68	U-0.52
Double Glazing, e = 0.05
air	U-0.93	U-0.78	U-0.73	U-0.56
argon	U-0.87	U-0.71	U-0.66	U-0.50
Triple Glazing
air	U-0.90	U-0.70	U-0.67	U-0.51
argon	U-0.87	U-0.69	U-0.64	U-0.48
Triple Glazing, e = 0.20
air	U-0.86	U-0.68	U-0.63	U-0.47
argon	U-0.82	U-0.63	U-0.59	U-0.43
Triple Glazing, e = 0.20 on 2 surfaces
air	U-0.82	U-0.64	U-0.60	U-0.44
argon	U-0.79	U-0.60	U-0.56	U-0.40
Triple Glazing, e = 0.10 on 2 surfaces
air	U-0.81	U-0.62	U-0.58	U-0.42
argon	U-0.77	U-0.58	U-0.54	U-0.38
Quadruple Glazing, e = 0.10 on 2x surfaces
air	U-0.78	U-0.59	U-0.55	U-0.39
argon	U-0.74	U-0.56	U-0.52	U-0.36
krypton	U-0.70	U-0.52	U-0.48	U-0.32

1.	U-factors are applicable to both glass and plastic, flat and domed units, all spacers and gaps.
2.	Emissivities shall be less than or equal to the value specified.
3.	Gap fill shall be assumed to be air unless there is a minimum of 90% argon or krypton.
4.	Aluminum frame with thermal break is as defined in footnote 2 to Table 10-6B.

[Statutory Authority: RCW 19.27A.025, 19.27A.045. 10-03-115, 10-13-113 and 10-22-056, § 51-11-1006, filed 1/20/10, 6/21/10 and 10/28/10, effective 1/1/11. Statutory Authority: RCW 19.27A.022, 19.27A.025, 19.27A.045, and chapters 19.27 and 34.05 RCW. 07-01-089, § 51-11-1006, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27A.025, 19.27A.045 and chapters 19.27, 19.27A, and 34.05 RCW. 05-01-013, § 51-11-1006, filed 12/2/04, effective 7/1/05. Statutory Authority: RCW 19.27A.025, 19.27A.045. 02-01-112, § 51-11-1006, filed 12/18/01, effective 7/1/02; 01-03-010, § 51-11-1006, filed 1/5/01, effective 7/1/01; 98-03-003, § 51-11-1006, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27, 19.27A and 34.05 RCW. 94-05-059, § 51-11-1006, filed 2/10/94, effective 4/1/94. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, § 51-11-1006, filed 12/19/90, effective 7/1/91.]

Notes: