Layered Analysis
We calculate the thermal resistance (R-value) of each individual component, from internal finishes to specialized external insulation systems.
U‑Value
Calculations
High-precision thermal transmittance analysis for architectural compliance. We provide rigorous modeling of heat loss through building elements to ensure Part L compliance and optimal energy performance.
Request Analysis
Technical Precision
Thermal Bridging
Our modeling accounts for repeating thermal bridges as per BR443 standards. We analyze timber studs, mortar joints, and metal rails to provide a representative 'weighted' U-value that reflects real-world performance.
BR443 Compliant
Part L Approved
Condensation Risk Analysis
Alongside U-values, we perform Glaser Method interstitial condensation checks (BS 5250) to ensure the building fabric remains healthy and dry throughout its lifespan.
Dew Point Check
External Temp-5°C
Internal Temp21°C
StatusCLEAR
PRECISION LEVEL
0.001
Calculation tolerance for high-performance facades and passive house specifications.
The Calculation Process
From structural specifications to finalized certification, our workflow ensures 100% accuracy and compliance with current UK building regulations.
Data Acquisition
Collection of detailed section drawings, material specifications, and thermal conductivity (λ) values for all building components.
01
02
Thermal Modeling
Construction of digital fabric models including thermal bridging analysis and moisture penetration risk assessments.
Optimization
Where initial values fail compliance, our experts suggest alternative insulation strategies or structural refinements to meet targets.
03
Certification
Final signed U-value certificates issued in PDF format, ready for submission to Building Control and SAP assessors.
Compliance Matrix
Comparing standard Part L targets with Greens Surveyors' optimized thermal strategies. All values expressed in W/m²K.
Standard Compliance (Part L)
Greens Optimized Design
| Building Element | Current Part L | Greens Standard | Optimization |
|---|---|---|---|
| External Walls | 0.18 | 0.14 | -22% Heat Loss |
| Ground Floors | 0.13 | 0.11 | -15% Heat Loss |
| Roofs (Pitched) | 0.11 | 0.09 | -18% Heat Loss |
| Windows/Glazing | 1.20 | 0.85 | -29% Heat Loss |