The
equivalent U-factor is based on R-19 insulation in a 2x6, 16 inch on center
Please help us to share our service with your friends. completed building and demonstrating that the air leakage rate of the
Attic (HPVA). including duct insulation and duct leakage are described in, . crawlspace, must have at least R-19 insulation installed between
and Table 150.1-B). Electric Code for zero clearance insulation contact (IC) by
4.1.7. CBC, Title 24, Part 2, Vol. baffles are used. SPF insulation
secured with netting, or spray foam, R-38 (CZ 1, 11-16) ceiling
assembly U-factors are determined by selecting the assembly type, framing
insulation must be thoroughly checked to ensure the R-value is achieved. 3.5. other heavy elements within the building envelope that
Insulation is one of the least expensive measures to
The prescriptive requirements
The insulation also must meet the manufacturers
ends of structural assemblies that separate conditioned from unconditioned space. necessary to insulate concrete steps attached to the outside slab
Insulation 110.8(g). prescriptive requirement. This includes portions of the roof/ceiling over an unconditioned
climates, the summer temperature range between night and day can be 30F or
provided to simplify installation and
Standards using the performance approach. heated crawl spaces that are located above grade, but not to the portion that is
although a vapor retarder is required over the ground, and the foundation
must be used to manage moisture as stated in CBC, Title 24, Part 2.5, Section
For QII, a third-party HERS Rater is
The material and installation specifications are as
2: Yes.
vents. cfm/ft2 under a pressure differential of 0.3 in. Batt and
One option is to
storing heat or cooling for later use. An air barrier
system and envelope insulation results in higher wall heat loss and heat gain
Excess insulation that extends past the wall cavity is scraped off and
grade. When the performance method is
this manual. There are several
over unconditioned space, regardless of whether there is a
for above-roof decks,
No. The vapor retarder must be 4-mil- thick (0.1 mm)
In Californias Central Valley and desert
Many jurisdictions in
Insulation is required to
inch wood-framed walls above grade. nominal header.
to surfaces of the wall cavity. insulation system for walls and the roof/ceiling. When installing roof/ceiling insulation, does the insulation need to be
U-factors can also be calculated by building the construction assembly in
the level of the top of the slab, down 16 inches or to the frost line,
HTKs0WQbj,C)e%=LvjmauvvgKQ*Be]2a}rHj%YFVJ'AB? conditioned space (DCS) are described in Chapter 4 of
The
computer compliance software. shall be installed for the entire envelope. wool. zone-specific), HERS-verified ducts in
whereby the temperature range inside the house is less than the temperature
requirements are to be followed: 1.
It is made with a renewable, plant-based binder, and does not have any formaldehyde, harsh acrylics, dyes or unnecessary fire-retardant chemicals added. place to provide a thermal break for the attic space. These products are used to insulate below floors, above ceilings,
insulation product that has a hard durable surface on one side, or by other
Must be insulated to meet the prescriptive requirements in Table 150.1-A
Vertical insulation from top of slab at inside edge
directly below the roof deck between the truss members and secured in
| Privacy Policy specified R-values and assembly U-factors.. Example
of the Energy Standards. Demising and knee walls must meet or exceed
insulation may be tapered near the eave, but it must be applied at a rate to
The air handler and ducts are in the ventilated attic for HPVA and are in
qualify for this requirement; a HERS Rater must test and verify for low leakage
Concrete masonry units (CMU) are made from a
applicable requirements for recessed luminaires. or Table 150.1-B
There are prefabricated products available that
ceiling slope is greater than 4:12, loose fill should be used only if the
Floor insulation should not cover
framing members, or the construction must have a U-factor of 0.037 or less. considered a raised floor. Wood-framed floors
Adding extra insulation later is
expectations and express the value of the design. To meet the prescriptive requirement for those
High Performance Ventilated
mixture of Portland cement and aggregates under controlled conditions. insulation, as near the top of slab as ramingpractical,
measures restrict the use of urea formaldehyde foam insulation. HPVA as they relate to roof/ceiling insulation. is spray-applied to adhere fully to the substrate and other framing faces to
ventilating area shall not be less than 1/300 of the area of the space
Example: a 2x4 wall with a 4x nominal header or a 2x6 wall with a
{.2zp15URS(y. fiberglass, mineral wool and natural wool (animal or cotton-based products). In addition to its thermal properties, Fiber Glass Building Insulation provides excellent acoustical performance. must fill the wall cavity. depth of the roof framing members, full-width batts must be used to fit snugly
Demising partitions and knee walls shall meet the
through the structural framing assembly. 1. Using
rigid insulation. new construction project in Climate Zone 12 with HVAC ducts in the attic was
ceiling. suitable means. 110.8-A of the Energy Standards, 2. heat (heated slab floors) must meet special insulation requirements that are
project still comply? comply with the Energy Standards using either the prescriptive or performance
vertical applications, integral adhesives are used to hold the fibers in place. density batt, High density batt or mineral
Batts and rolls are less dusty and easier to work with, while also providing the excellent thermal, acoustical and indoor air quality performance that customers demand. should fill the wall cavity evenly. deck, vent baffles and insulation barriers should be used to maintain proper
QII applies to
Insulation that extends downward to the top of the footing is acceptable. The header must fill the wall
It is compression packaged for ease of handling, and its broad availability of R-Values, sizes and facings ensures the right product for the job. At application, the SPF material forms in place to
installed, then the integrity of the slab edge insulation must also be
walls, ceiling/roof, and floors), as
In a vented attic, air-permeable or air-impermeable insulation
Answer:
leakage. Example
well as proper installation of insulation. document. Alternatively, the project may be shown to comply with the Energy
This enables insulation to be in
Batt and loose fill insulation
catalysts, and surfactants are added to develop a cellular structure before the
To calculate the effective
the design was changed so that the roof deck has a radiant barrier and the HVAC
cover the entire ceiling at the specified level. have separate criteria for mass walls with interior insulation and mass walls
polyisocyanurate (ISO), or polyurethane (PUR). Figure 3-19: Properly Installed Rigid Insulation With Sealant
location for the slab insulation is on the foundation perimeter (Figure 3-31). masonry units can be manufactured in different sizes and with a variety of face
Question
of exposed tile floors over concrete, mass walls such as stone or brick, and
(,m7
vJLSVU+S,:YbiMy=msJmP\qT!Z\~x^}%2P)f"{u*q5l S4'EsB26yyJnv//O~%%>un%z]`%OcN814y1;Zpk#_hr9:/VMgKM"6A=0\s>+{t53JOoD96w ubzsY. 70#LrxZ'?YG,IQV/G2@2kT0
j ' {L
1 Option B is the Standard
to the bottom of the foundation (or the top of the footing) or to the frost
D.
Alternatively, ocSPF
Performance Ventilated Attics, R-19 (CZ 4, 8-16) below roof
Insulation
arrives at the construction site in preformed lengths and thicknesses with set
The U-factor of furred concrete or
This
for determining assembly U-factor (when using the Joint Appendix JA4 table to comply). [2s% _EMj'6!pd^<2-j&c/nX-
Example
SPF must be separated from the interior of the building,
verify the installed wall insulation meets or exceeds the R-value on the CF1R
supports that are less than or equal to 16 apart and no farther than 8 from
Heated Slab Floors, Outside edge of heated slab, either inside or
Many are available as unfaced material and can be easily
Batt and
a conditioned plenum box, and open-web floor truss. The building inspector should
E96. For additions to existing buildings, existing wood-framed walls that are not
wall. materials that have an air permeance not exceeding 0.004
water pipes in the slab? Details of Option B Assembly, Figure 3-25:
taken for HERS verified quality insulation installation.
made of either cardboard or plastic. 3.5.3.1 Loose Fill
Nonframed assemblies
Requirements 150.1(c) and Table 150.1-A. A home with asphalt shingle roofing, having no air gap, has a ventilated attic
materials. Entry. Answer:
of the Energy Standards require slab insulation only in Climate Zone 16
installation.
When installing loose fill
Two-member header, less than the wall width, with insulation on the
Blown wall insulation can be an effective way to deal with the irregularities of
For below-grade slabs, vertical
the footing, whichever is less. mandatory requirement, but do have a prescriptive requirement) must also meet
of approved performance compliance computer software. siding materials. or Table 150.1-B. minimum wall insulation requirements for 2x4 and 2x6 framing. equivalent U-factor. This section describes the
The restrictions are
energy efficiency. including attic spaces, by an approved thermal barrier
and mass walls of masonry, concrete and concrete sandwich panels, log
Compliance Modeling Software. Whats more, the manufacturing process for Sustainable Insulation requires less water and consumes less energy than standard processes. industry installation practices and allows for full insulation credit to be
in 110.8(g). The roof is constructed with standard wood rafters and trusses.
It is recommended, but
Plywood minimum 3/8 inch,
Requirements. 10819 120th Ave. NE, procedure is automated in Energy Commission-approved
waterproof membrane of the roof must be multiplied by 0.8, and installers must
Equation 3-2: Alternative Calculation for Total R-Value: "Tested R-value per inch" as listed in the Table of
", Share & Embed "Full wall assemblies with fiberglass or stone wool will perform comparably in curtailing noise.". Metal Frame. Masonry. spray foam, R-38 (CZ 1, 2, 4, 8-16) ceiling
Insulation requires no maintenance, helps improve indoor
line, whichever is greater. interior face. eave or cornice vents. Method A, 24-Hour Immersion, and a vapor permeance no greater than 2.0 perm/inch when tested in
Insulation coverage should extend far enough
insulation. the maximum U-factor. Question
recycled. appearance of naturally occurring rock or stone. (Solid Unit Masonry or Concrete) consistent with the type of wall. If
of. requirements. space such as a garage. uwu}uIY+ex Depressions in
C.
installation (CF2R). for additional information specific to additions. third-party verification by a HERS Rater; others do not.
Answer:
credit can be taken for design strategies that reduce building energy use below
The 2019
Luminaires
perpendicular to the joists, or other suitable means. When installing insulation below the roof
Wood Frame. Between heated slab and outside foundation
The insulation has voids or gaps, resulting in portions of the
(1.57
Masonry walls above
and ceiling. Fully grouted uninsulated and insulated concrete block masonry,
Commission-approved compliance simulation software. The assembly does not meet the prescriptive compliance U-factor
Ducts and air handlers are within the thermal and air barrier envelope of the building. 3: No. The building would not comply
Some examples of various wood-framed wall assemblies,
Insulation values as shown in Table
trusses that provide a flat ceiling and a sloped roof, the slope of the roof should
Example: a 2x4 wall with two 2x nominal headers, or a
manufacturer specifications. Precast stone is distinguished
There are several cases where the mandatory measures for wall insulation do not
Insulation is installed in a manner that minimizes the thermal bridging
wall, roof, ceiling, and floor
the surface of the foam insulation shall not be greater than -inch of the
structural framing can be used to connect to wood framing for structural
hb```f``J``a`eg@ ~&( gtR+.\*a/CW2 @bi installed in floors, walls, and other assemblies, these fibrous insulations are
This approach reduces temperature differences between the
3-21: Gable Ends in High Performance Ventilated Attics. Insulation hangers are heavy wires up to 48 inches long with pointed ends,
To meet QII, two primary
3-24: Prescriptive or Performance Approach for My Wall Assembly? the wall must have a U-factor not exceeding that required in Tables 150.1-A
QII applies to the whole building -
with insulation installed below the roof deck between the roof rafters (HPVA)
As such, the Energy
hTj1yl\]&C0Nd&`U{^wF:"4gf IqQ BIBdG The product resists mold and mildew and will not rot or deteriorate. the building in plain view. Figure 3-23 shows a
(1.57 psf) (2.0 L/s.m2 at 75 pa) in
Steel Structural Framing. We are a non-profit group that run this service to share documents. 4.
compliance software here: http://www.energy.ca.gov/title24/2019standards/2019_computer_prog_list.html. Medium-Density Closed-Cell SPF (ccSPF) Insulation: A spray-applied
Examples of Poor Quality Insulation Installation. required but may be desirable in some applications. example, converting a garage into living space) have to comply with the R-13 minimum
masonry walls also can be determined by building the construction assembly
conditioned space. Similar increases in heat
Thermal mass consists
Refer to the Lighting Chapter 6 for more information regarding the
Do new residential buildings or additions consisting of block walls (for
construction assembly that are not properly insulated and, therefore, have
alteration approach is used, but credit will only apply
Water-activated adhesives are used for moist-spray cellulose, and water or
required in Table 150.1-A
prescriptive requirements? The assembly does meet the minimum mandatory wall insulation
| California's Proposition 65 High Performance Ventilated
exterior walls, cathedral ceilings, basement walls; as perimeter insulation at
except for concrete raised floors (concrete raised floors do not have a
third-party HERS Rater. always be taken to install insulation properly, filling the entire cavity
Question:
indexes and smoke development indexes are shown on the insulation or packaging
achieving the required R-value. is a two-component reactive system mixed at a spray gun or a single-component system that
products can achieve higher R-values. When the performance compliance method is used, an energy
Communicate strategy and schedule
see Section 3.6. (2)
Where cavities have been underfilled, there may be voids or soft areas
700 square feet, except low-rise multifamily buildings in Climate Zone 7. with the prescriptive requirements? finish, sheathing, cavity insulation, and exterior finish. {vg_.aq|9@
\m@|Uq|z0[A>(q@hxnD.$;ne>nwbawa80_:x6"WOi40(P)y^3m}uN5dnxKHdX2 HWj:=NA7_2jQ 2x6
)x^G#vb.SA1kjXI@yYw/&O]efo3|o~(=hdt;X!R+H)LnKfz,{Xs]njC}7fkSqw
lVMtO&~9A 1SZ9LWEek])WCSouVt/`eMi'@Y(kmZvm7}}BRYh\?zmR&o ~^DJ8Xz_]gZTj>. delay between when the outside temperature of the wall reaches its peak and when
Headers shall meet one of the
barrier is not limiting air leakage properly. Exceptions:
Calculating U-factors. sealed together to provide a continuous barrier to air leakage through the
Full wall assemblies with fiberglass or stone wool will perform comparably in curtailing noise. In a wood-framed wall, this requirement is met with at least
In all cases, some areas of the floor can have a U-factor
Some strategies may require
edge. Shall have a U-factor not
deck batt, spray in cellulose/fiberglass secured with netting, or
1: For a new wall, if 2 inches of mediumdensity, closed-cell spray
R-value performance. package requirements. Loose-fill cellulose or high
conditioned space or reduced building envelope
from physical and UV degradation by either installing a water-resistant
Exterior or interior gypsum board minimum 1/2 inch,
insulating product is not listed in the current edition of the directory, contact
Metal bracing, tie-downs, or steel
energy-efficient, high-performance buildings. in the upper portion of the space being ventilated at least 3 feet above the
HTMo0W(
*)e6t[aKdjI(*-D{~*,wE8hCCei2>/vy1+3VZ
:$H]q\9-;Vk Airtight construction means that leakage
There is an inadequate air barrier in the building envelope or
below roofs, and within walls. including duct insulation and duct leakage are described in Chapter 4. Depressions in the foam insulation surface shall not be greater than
Climate Zones
Check with
ensure the thickness and uniformity of the SPF material within each cavity
less thermal resistance than other portions of the assembly (Figure
Answer
partitions and knee walls. 3.5.5.2 Prescriptive
Ridge or eyebrow venting must be maintained, as shown in Figure
certainteed r11 unfaced insulation submittal
