| Product(s): | Hevacomp Mechanical Designer | ||
| Version(s): | V8i (N/A) | ||
| Environment: | N/A | ||
| Area: | N/A | ||
| Subarea: | N/A |
Overview
PSI values for thermal bridging can be adjusted by SBEM if they are not accredited figures.
Method
The method for entering PSI data has changed between the 2006 and 2010 and 2013 regulations.
When choosing thermal bridges there are a number of considerations. If user detail are not entered and the thermal bridging is not accredited then the figures displayed on the screen will be used.If user details are not entered and the thermal bridging is accredited then the figures displayed on the screen will be used.
If you wish your own figures to be considered for Thermal Bridging you should enter your figures into the corresponding input field and ensure that "Accredited detail" is ticked.
If the option remains unticked then regardless of any input data, default figures will be used.
In accordance with iSBEM/SBEM technical manual, if default figures are used for Thermal Bridging then they will be subject to an adjustment figure as defined in the 2010 ADL2A document.
Default thermal bridges after adjustment (w/mk)
| Junction | Metal clad | Non metal clad |
| Roof/Wall | 0.42 | 0.18 |
| Wall/Ground floor | 1.725 | 0.24 |
| Wall/Wall (corner) | 0.375 | 0.135 |
| Wall/not ground floor | 0.04 | 0.11 |
| Lintel (window/door) | 1.905 | 0.45 |
| Sill (window) | 1.905 | 0.08 |
| Jamb (window/door) | 1.905 | 0.09 |