Critical Temperature Factor Modelling

Modelling of critical temperature factor, Frsi, provides you with evidence that your construction details for new build or retrofit address the risk of condensation and mould growth. 

For PAS 2035 Retrofit projects, where industry standard details are not being adhered to, modelling of critical temperatures is an essential part of compliance.  Specifically PAS 2035 requires that: "Construction details shall be configured to maintain the continuity of the three-dimensional insulated envelope and the integrity of any airtightness barrier, in order to eliminate thermal by-pass (i.e. the uncontrolled penetration of cold air to the warm side of any insulation layer), minimize thermal

bridging and maintain an appropriate or specified standard of air-tightness. Construction details published as part of industry best practice guidance can be used;

alternatively, if other details are used it shall be shown by calculating it in accordance with IP1/06 Assessing the effects of thermal bridging at junctions and around

openings that the temperature factor (fRsi) of each detail is not less than 0.75."

We offer both 2D and 3D modelling in accordance with BRE IP1/06 and BR 497.

Contact Us today with your requirements and we'll be happy to discuss how we can support your project.