REVIEWED-BLD2023-0474+WSEC+4.4.2023_8.10.24_PM+3463509................................................
BY I RECEIVED
BLD2023-0474
CITY OF EDMONDS Apr 8 2023
BUILDING DEPARTMENT: p
CITY OF EDMONDS
Alterations Worksheet - 2018 Washington State Energy Code DEVELOPMENT SERVICES
DEPARTMENT
Project Information Contact Information
Addition & Remodel
Sanchez & McPhillips Residence
The WSEC requirements for alterations are located in Chapter 5 of the code text.
Alterations (remodels) do not need to obtain energy credits from Table R406.3
Additions must meet the requirements for new construction. This includes nonconditioned space b
altered to become conditioned space.
Will the wall cavities be exposed? p Yes ❑ No
If yes: Exposed wall cavities must be insulated -
2 X 4 wall studs require R-15 insulation
2 X 6 wall studs require R-21 insulation
Will the roof/ceiling framing cavities or attic be exposed? 171 Yes ❑ No
If yes: Exposed roof/ceiling assemblies must be insulated -
Vaulted ceilings: Insulate to the full depth of the framing member
while allowing for the minimum 1" ventilated spac
Flat ceilings
Will the floor framing cavities be exposed?
Install R-49 insulation or what the attic space car
accommodate based on the roof pitch
0 Yes ❑ No
If yes: Exposed floor cavities must be insulated to R-30
Are the windows and/or doors being replaced? 0 Yes El No
(includes both window or door and frames)
If yes: New windows and doors must have an area weighted average Ll-factor of <_0.3
Will the heating or cooling system be replaced? ❑ Yes RI No
If yes: New equipment must meet current requirements and
ducts need to be tested
Will the hot water system be altered? 0 Yes ❑ No
If yes: New water heating equipment must meet current code requirements
Are more than 50% of the light fixtures being changed? ❑ Yes 0 No
If yes: 75% of all lamps must be high efficacy
(LED or CFL)
R503.1.1 Building envelope. Building envelope assemblies that are part of the alteration shall comply with Section I
or R402.1.4, Sections R402.2.1 through R402.2.11, R402.3.1, R402.3.2, R402.4.3 and R402.4.4.
Exception: The following alterations need not comply with the requirements for new construction provil
energy use of the building is not increased:
1. Storm windows installed over existing fenestration.
2. Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are fi
insulation. 2x4 framed walls shall be insulated to a minimum of R-15 and 2x6 framed walls shall be insuli
minimum of R-21.
3. Construction where the existing roof, wall or floor cavity is not exposed.
4. Roof recover.
5. Roofs without insulation in the cavity and where the sheathing or insulation is exposed during rero
be insulated either above or below the sheathing.
6. Surface -applied window film installed on existing single pane fenestration assemblies to reduce sol
gain provided the code does not require the glazing fenestration to be replaced.
R503.1.1.1 Replacement fenestration. Where some or all of an existing fenestration unit is replaced with a new fen
product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U
and SHGC in Table R402.1.1. Where more than one replacement fenestration unit is being installed, an area -weights
average of the U-factor and SHGC of all replacement fenestration shall be permitted to be used to demonstrate con
R503.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of the
alteration shall comply with Section R403.
Exceptions:
1. Where ducts from an existing heating and cooling system are extended, duct systems with less than 40 linear feel
unconditioned spaces shall not be required to be tested in accordance with Section R403.2.2.
2. Existing duct systems constructed, insulated or sealed with asbestos.
R502.1.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of the addition shall c
with Section R403.
Exception: The following need not comply with the testing requirements of Section R403.3.3:
1. Additions of less than 750 square feet.
2. Duct systems that are documented to have been previously sealed as confirmed through field verif
and diagnostic testing in accordance with procedures in WSU RS-33.
3. Ducts with less than 40 linear feet in unconditioned spaces.
4. Existing duct systems constructed, insulated or sealed with asbestos.
R503.1.3 Service hot water systems. New service hot water systems that are part of the alteration shall comply wit
R403.5.
R503.1.4 Lighting. New lighting systems that are part of the alteration shall comply with Section R404.1.
Exception: Alterations that replace less than 50 percent of the luminaires in a space, provided that such
alterations do not increase the installed interior lighting power.
R503.2 Change in space conditioning. Any nonconditioned or low -energy space that is altered to become condition
shall be required to be brought into full compliance with this code.
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