Choose an external wall with the evidence in view
Describe the project, bring in the BIM model, state what matters, and compare Kerala wall options on thermal performance, embodied carbon, cost, the ENS 2024 envelope rule and climate. Every number traces to a cited source; missing data stays missing.
1Project
Location sets the climate data and the ENS orientation factors. Kerala sites use the warm-humid RETV coefficients.
Notes are kept with your project in this browser only. They are not scored.
Site location
Click the map or drag the pin. Lines show today's sunrise, sunset and current sun direction from the site.
Map data © OpenStreetMap contributors. Place searches are sent to the OpenStreetMap Nominatim service; nothing else leaves your browser.
2Model
Upload an IFC file (IFC2x3 or IFC4) exported from Revit, ArchiCAD or BlenderBIM, use the sample house, or type facade areas. The file is read in your browser and is not uploaded anywhere.
Wall heat analysis
At this month and time (W/m²)
Over the whole year (kWh per m² of wall)
Incident solar from the monthly-average-day method (NASA POWER radiation, isotropic sky, no shading by neighbours or overhangs). Heat into the room = U × absorptance × solar × 0.04 m²K/W (ENS outside surface resistance), a steady-state sol-air estimate: heavy walls delay it by their time lag and damp it by their decrement factor.
Walls read from the model
Materials are mapped to ENS 2024 Table 46 by name; unmapped layers are never guessed.
3Goals & budget
Pick the priority that matches the brief. Presets set the criterion weights; they are stated preferences, not AHP-derived weights.
Fine-tune weights and the evidence gate
Wall budget
Masonry units only (no mortar, plaster, labour or transport). Only materials with a price listing can be checked.
Project expectations
Shown beside the results as targets to read against. They do not change any score.
4Material studio
Pick a wall material and a product size or market listing for this project. Budget, data, score, suitability and savings update from the engines; nothing is written by a language model. Hover any chart mark to trace the same material everywhere; click to open it here.
Criteria rose
Normalised score per criterion within the ranked set; hatched = no cited data.
Material data
Assembly values from ENS 2024; product values are manufacturer claims or secondary summaries (grade C).
Why it scores this way
Suitability for this project
How to reduce cost, heat gain and carbon
5Results
Score composition
Weighted sum of normalised criteria, relative to the ranked set only. Bars show each criterion's contribution.
Criteria profile, top three
Normalised 0 (worst in set) to 1 (best in set). Missing criteria break the outline instead of reading as zero.
ENS 2024 RETV if every external wall were…
Thermal and carbon trade-off
Materials with both a U-value and a cited carbon figure. Lower-left is better on both.
Daily heat-wave damping
Decrement factor (EN ISO 13786), lower damps more. Indicator only, not scored.
Masonry-unit cost against budget
Ranking details
Explanation
Written from the engine output. Optional language models only rephrase it, and every number is checked against the engine before it is shown.
6Sun & climate
Sun geometry for the site and estimated solar exposure of each facade (monthly-average-day method on NASA POWER radiation, isotropic sky, no shading). Exposure inputs only: they explain the RETV orientation factors and never carry a weight.
Sun path
Facade solar exposure wheel
Daily incident solar radiation, kWh/m² per day, by facade orientation (sectors) and month (rings, January inside).
Daily solar by facade
Hourly heat map
Average incident solar radiation (W/m²) on the selected facade by month and solar hour.
7Evidence
What each material's numbers rest on. Grade A is product-verified, B published research, C provisional; hatched cells have no usable value.
Material library
Assemblies use ENS 2024 Table 46 dry-state conductivities.