Walls with partially filled cavities

Junction ψ-values and f-values (walls with partially filled cavities)

Thermal bridging ψ-values and f-values for walls partially filled with PU thermal insulation.

The models given in this document cover:

Ultralightweight aggregate blocks with λ not exceeding 0.28 W/mK
Lightweight aggregate blocks with λ not exceeding 0.60 W/mK
Dense aggregate blocks with λ not exceeding 1.33 W/mK

SAP 2012 approved and default ψ-values should be applied to each dwelling.

See individual CBA details for guidance on allocation of calculated ψ-values to dwellings at a junction.

E2 PF CBA Cert 213 Independent Concrete Lintels

SAP 2012 Table K1 ref: E2
Junction Detail: Other lintels (including other steel lintels)
SAP2012 Approved ψ-value (W/mK): 0.30
SAP2012 Default ψ-value (W/mK): 1.00
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.022 to 0.024
Lightweight: 0.017 to 0.022
Dense: 0.015 to 0.021
CBA detail ref: E2 PF CBA-213

E3 PF CBA Cert 214

SAP 2012 Table K1 ref: E3
Junction Detail: Sill
SAP2012 Approved ψ-value (W/mK): 0.04
SAP2012 Default ψ-value (W/mK): 0.08
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.019 to 0.027
Lightweight: 0.018 to 0.027
Dense: 0.018 to 0.027
CBA detail ref: E3 PF CBA-214

E4 PF CBA Cert 215 Window Jamb

SAP 2012 Table K1 ref: E4
Junction Detail: Jamb
SAP2012 Approved ψ-value (W/mK): 0.05
SAP2012 Default ψ-value (W/mK): 0.10
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.041 to 0.055
Lightweight: 0.013 to 0.021
Dense: 0.013 to 0.021

E5 PF CBA Cert 201 Floor Beams & Block

SAP 2012 Table K1 ref: E5
Junction Detail: Ground Floor (Normal)
SAP2012 Approved ψ-value (W/mK): 0.16
SAP2012 Default ψ-value (W/mK): 0.32
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.055 to 0.064
Lightweight: 0.091 to 0.107
Dense: 0.144 to 0.177
CBA detail ref: E5 PF CBA-201 (Beam and Blick)

E5 PF CB-202 (Slab on Ground)

E6 PF CBA Cert 203 Intermediate Floor

SAP 2012 Table K1 ref: E6
Junction Detail: Intermediate floor within a dwelling
SAP2012 Approved ψ-value (W/mK): 0.07
SAP2012 Default ψ-value (W/mK): 0.14
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.000
Lightweight: 0.000 to 0.001
Dense: 0.000 to 0.002
CBA detail ref: E6 PF CBA-203

E7 PF CBA Cert 204 Party Hollow Core Floor

SAP 2012 Table K1 ref: E7
Junction Detail: Intermediate floor between dwellings*
SAP2012 Approved ψ-value (W/mK): 0.07
SAP2012 Default ψ-value (W/mK): 0.14
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.085 to 0.121
Lightweight: 0.086 to 0.124
Dense: 0.088 to 0.126
CBA detail ref: E7 PF CBA-204

E10 PF CBA Cert 208 Eaves @ Ceiling

SAP 2012 Table K1 ref: E10
Junction Detail: Eaves (insulation at ceiling level)
SAP2012 Approved ψ-value (W/mK): 0.06
SAP2012 Default ψ-value (W/mK): 0.12
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.080 to 0.097
Lightweight: 0.086 to 0.105
Dense: 0.090 to 0.111
CBA detail ref: E10 PF CBA-208

E11 PF CBA Cert 209 Eaves @ Rafter

SAP 2012 Table K1 ref: E11
Junction Detail: Eaves (insulation at rafter level)
SAP2012 Approved ψ-value (W/mK): 0.04
SAP2012 Default ψ-value (W/mK): 0.08
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: -0.008 to 0.007
Lightweight: -0.009 to 0.007
Dense: -0.009 to 0.008
CBA detail ref: E11 PF CBA-209

E20 Exposed Floor Normal

SAP 2012 Table K1 ref: E20
Junction Detail: Exposed Floor (Normal)
SAP2012 Default ψ-value (W/mK): 0.32
Calculated CBA Full-fill ψ-value (W/mK):

Ultra-lightweight: 0.135 to 0.158 Lightweight: 0.201 to 0.219 Dense: 0.307 to 0.318 CBA detail ref: E20-C-B1 Concrete floor over garage/side wall

Ultra-lightweight: 0.223 to 0.238 Lightweight: 0.230 to 0.244 Dense: 0.239 to 0.252 CBA detail ref: E20-C-B2 Concrete floor over drive-through/side wall

Ultra-lightweight: 0.086 to 0.172 Lightweight: 0.088 to 0.231 Dense: 0.090 to 0.291 CBA detail ref: E20-C-B3 Concrete floor over garage or drive through/opening

Ultra-lightweight: 0.078 to 0.081 Lightweight: 0.131 to 0.139 Dense: 0.227 to 0.243 CBA detail ref: E20-T-B1 Timber floor over drive-through/side wall

Ultra-lightweight: 0.100 to 0.107 Lightweight: 0.142 to 0.150 Dense: 0.189 to 0.200 CBA detail ref: E20-T-B2 Timber floor over drive-through/side wall

Ultra-lightweight: 0.069 to 0.1050 Lightweight: 0.082 to 0.161 Dense: 0.094 to 0.244 CBA detail ref: E20-T-B3 Timber floor over garage or drive through/opening

E21 Exposed floor (inverted)

SAP 2012 Table K1 ref: E21
Junction Detail: Exposed floor (inverted)
SAP2012 Default ψ-value (W/mK): 0.32
Calculated CBA Full-fill ψ-value (W/mK):

Ultra-lightweight: 0.056 to 0.057 Lightweight: 0.136 Dense: 0.259 CBA detail ref: E21-C-B1 Concrete floor over garage/side wall

Ultra-lightweight: 0.171 to 0.172 Lightweight: 0.170 Dense: 0.070 to 0.171 CBA detail ref: E21-C-B2 Concrete floor over drive-through/side wall

Ultra-lightweight: 0.061 to 0.070 Lightweight: 0.121 to 0.132 Dense: 0.196 to 0.209 CBA detail ref: E21-T-B1 Timber floor over garage/side wall

Ultra-lightweight: 0.143 to 0.154 Lightweight: 0.143 to 0.155 Dense: 0.144 to 0.155 CBA detail ref: E21-T-B2 Timber floor over drive-through/side wall

E24 Eaves (Insulation at ceiling level – inverted)

SAP 2012 Table K1 ref: E24
Junction Detail: Eaves (Insulation at ceiling level – inverted)*
SAP2012 Default ψ-value (W/mK): 0.24
Calculated CBA Full-fill ψ-value (W/mK):

Ultra-lightweight: 0.094 to 0.111 Lightweight: 0.191 to 0.110 Dense: 0.091 to 0.110 CBA detail ref: E24-1-C-B Pitched roof over addition/concrete lintel

Ultra-lightweight: 0.117 to 0.158 Lightweight: 0.116 to 0.158 Dense: 0.117 to 0.159 CBA detail ref: E24-1-S-B Pitched roof over addition/steel lintel

Ultra-lightweight: 0.106 to 0.123 Lightweight: 0.103 to 0.122 Dense: 0.102 to 0.121 CBA detail ref: E24-2-C-B Pitched roof over bay/concrete lintel

Ultra-lightweight: 0.173 to 0.175 Lightweight: 0.174 to 0.177 Dense: 0.176 to 0.180 CBA detail ref:E24-2-S-B Pitched roof over bay/steel lintel

Ultra-lightweight: 0.194 to 0.224 Lightweight: 0.194 to 0.224 Dense: 0.194 to 0.224 CBA detail ref: E24-3-C-B Stepped apartment/concrete floor

Ultra-lightweight: 0.186 to 0.211 Lightweight: 0.186 to 0.211 Dense: 0.187 to 0.212 CBA detail ref: E24-3-T-B Stepped apartment/timber floor

E12 PF CBA Cert 210 Gable @ Ceiling

SAP 2012 Table K1 ref: E12
Junction Detail: Gable (insulation at ceiling level)
SAP2012 Approved ψ-value (W/mK): 0.24
SAP2012 Default ψ-value (W/mK): 0.48
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.0049 to 0.0057
Lightweight: 0.076 to 0.087
Dense: 0.114 to 0.131
CBA detail ref: E12 PF CBA-210

E13 PF CBA Cert 211 Gable Insulation @ Rafter

SAP 2012 Table K1 ref: E13
Junction Detail: Gable (insulation at rafter level)
SAP2012 Approved ψ-value (W/mK): 0.04
SAP2012 Default ψ-value (W/mK): 0.08
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.0053 to 0.055
Lightweight: 0.072 to 0.073
Dense: 0.086 to 0.088
CBA detail ref: E13 PF CBA-211

E16 PF CBA Cert 216 Corner Normal

SAP 2012 Table K1 ref: E16
Junction Detail: Corner (normal)
SAP2012 Approved ψ-value (W/mK): 0.09
SAP2012 Default ψ-value (W/mK): 0.18
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.041 to 0.055
Lightweight: 0.046 to 0.064
Dense: 0.048 to 0.069
CBA detail ref: E16 PF CBA-216

E17 PF CBA Cert 217 Corner Inverted

SAP 2012 Table K1 ref: E17
Junction Detail: Corner (inverted – internal wall area greater than external area)
SAP2012 Approved ψ-value (W/mK): -0.09
SAP2012 Default ψ-value (W/mK): 0.00
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: -0.103 to -0.057
Lightweight: -0.110 to -0.059
Dense: -0.113 to -0.060
CBA detail ref: E17 PF CBA-217

E18 PF CBA Cert 205 Party Wall Junction

SAP 2012 Table K1 ref: E18
Junction Detail: Party (separating) wall between dwellings*
SAP2012 Approved ψ-value (W/mK): 0.06
SAP2012 Default ψ-value (W/mK): 0.12
Calculated CBA Full-fill ψ-value (W/mK): Ultra-lightweight: 0.072 to 0.100
Lightweight: 0.076 to 0.108
Dense: 0.078 to 0.113
CBA detail ref: E18 PF CBA-205

E25 Staggered separating wall between dwellings

SAP 2012 Table K1 ref: E25
Junction Detail: Staggered separating wall between dwellings*
SAP2012 Default ψ-value (W/mK): 0.12
Calculated CBA Full-fill ψ-value (W/mK):

Ultra-lightweight: 0.098 to 0.142 Lightweight: 0.0104 to 0.156 Dense: 0.107 to 0.165 CBA detail ref: E25-338-B 338mm stagger

Ultra-lightweight: 0.091 to 0.148 Lightweight: 0.095 to 0.155 Dense: 0.104 to 0.159 CBA detail ref: E25-1038-B 1038mm stagger

P8 Exposed floor (inverted)

SAP 2012 Table K1 ref: P8
Junction Detail: Exposed floor (inverted)*
SAP2012 Default ψ-value (W/mK): 0.24
Calculated CBA Full-fill ψ-value (W/mK):

Ultra-lightweight: 0.095 to 0.107 Lightweight: 0.169 to 0.184 Dense: 0.279 to 0.298 CBA detail ref: P8-C-B1 Concrete floor over garage

Ultra-lightweight: 0.201 to 0.217 Lightweight: 0.200 to 0.217 Dense: 0.171 to 0.217 CBA detail ref: P8-C-B2 Concrete floor over drive-through

Ultra-lightweight: 0.144 to 0.203 Lightweight: 0.167 to 0.251 Dense: 0.185 to 0.294 CBA detail ref: P8-T-B1 Timber floor over garage

Ultra-lightweight: 0.174 to 0.266 Lightweight: 0.173 to 0.265 Dense: 0.174 to 0.265 CBA detail ref: P8-T-B2 Timber floor over drive-through