WAC 51-11-0530   Table 5-1.  

TABLE 5-1

TARGET COMPONENT VALUES FOR GROUP R OCCUPANCY
Climate Zone
Component 1 2
Glazing % Floor Area 15% 15%
Vertical Glazing U-Factor

     Group R-1 and R-2

     Group R-3 and R-4

U = 0.400

U = 0.350

U = 0.400

U = 0.350
Overhead Glazing U-Factor U = 0. 58 U = 0. 58
Doors U = 0.200

(R-5)		 U = 0.200

(R-5)
Ceilings

     Attic





     Single Rafter/

     Joist Vaulted3

U = 0.031

(R-38)



U = 0.034

(R-30)

U = 0.031

(R-38)



U = 0.034

(R-30)
Walls1,2

     		U = 0.057

(R-21)		 U = 0.044

(R-19A +R-5)
Floors U = 0.029

(R-30)		 U = 0.029

(R-30)
Slab on Grade

     Slab R-Value		 F = 0.54

(R-10)		 F = 0.54

(R-10)
Below Grade Interior    
Wall R-Value R-19 R-19
2' Depth: Walls

     Slab		 U = 0.043

F = 0.69		 U = 0.043

F = 0.69
3.5' Depth: Walls

     Slab		 U = 0.041

F = 0.64		 U = 0.041

F = 0.64
7' Depth: Walls

     Slab		 U = 0.037

F = 0.57		 U = 0.037

F = 0.57
Below Grade Exterior    
Wall R-Value R-10 R-12
2' Depth: Walls

     Slab		 U = 0.070

F = 0.60		 U = 0.061

F = 0.60
3.5' Depth: Walls

     Slab		 U = 0.064

F = 0.57		 U = 0.057

F = 0.57
7' Depth: Walls

     Slab		 U = 0.056

F = 0.42		 U = 0.050

F = 0.42

1. Log and Solid Timber walls that have a minimum average thickness of 3.5" in spaces with space heating by "other fuels" are exempt from wall target UA and proposed UA calculations.

2. "A" means advanced framing. For more information, see Section 1005.2.

3. Requirement applicable only to single rafter or joist vaulted ceilings where both (a) the distance between the top of the ceiling and the underside of the roof sheathing is less than 12 inches and (b) there is a minimum 1-inch vented airspace above the insulation. Other single rafter or joist vaulted ceilings shall comply with the "ceiling" requirements. This option is limited to 500 square feet of ceiling area for any one dwelling unit.



[Statutory Authority: RCW 19.27A.022, 19.27A.025, 19.27A.045, and chapters 19.27 and 34.05 RCW. 07-01-089, § 51-11-0530, filed 12/19/06, effective 7/1/07. Statutory Authority: RCW 19.27A.025, 19.27A.045. 02-01-112, § 51-11-0530, filed 12/18/01, effective 7/1/02; 01-03-010, § 51-11-0530, filed 1/5/01, effective 7/1/01; 98-03-003, § 51-11-0530, filed 1/8/98, effective 7/1/98. Statutory Authority: Chapters 19.27 and 19.27A RCW and 1994 c 226. 95-01-126, § 51-11-0530, filed 12/21/94, effective 6/30/95. Statutory Authority: Chapter 19.27A RCW. 92-01-140, § 51-11-0530, filed 12/19/91, effective 7/1/92.]