Fencalc XA2021
SANS 10400-XA:2021 Training
Fenestration Fundamentals
Learn how to classify, measure, calculate and document fenestration compliance for SANS 10400-XA:2021 projects.
Lesson Roadmap
Work through the lessons in order, or continue from the next unfinished lesson.
1
Scope and Key Terms
Set up the compliance mindset: envelope, fenestration, nett floor area, U-value and SHGC.
2
Orientation and Solar Groups
Classify elevations into the orientation groups used for solar heat gain checks.
3
Glazing Percentage
Calculate total fenestration area as a percentage of nett floor area for each storey.
4
U-Value and SHGC Weighting
Use area-weighted averages for mixed window and door types.
5
Shading and Roof Lights
Understand how compliant shading affects SHGC checks and why roof lights are assessed separately.
6
Worked Compliance Workflow
Put the checks together in the same order you would use on a real project.
What You Need Before Starting
A current drawing set or sample project to practise with.
The project location, building type and storey information.
Window, door, roof, wall, floor or services schedules where relevant.
Supplier evidence for any performance values you plan to rely on.
A notebook for assumptions, missing information and review questions.
What You Will Learn
Outcome 1Identify which glazed elements form part of the building envelope assessment.
Outcome 2Separate solar and non-solar orientations before checking SHGC requirements.
Outcome 3Calculate per-storey fenestration percentage using nett floor area.
Outcome 4Use area-weighted U-value and SHGC checks instead of single-window assumptions.
Outcome 5Recognise when shading, roof lights, air leakage and condensation rules need extra attention.
SANS Reference Points
Use these as evidence prompts while studying. The training explains concepts, but the official standard remains the authority for project submissions.
Evidence point 1SANS 10400-XA:2021 clause 5.3: Fenestration
Evidence point 2SANS 10400-XA:2021 clause 5.1: Orientation
Evidence point 3SANS 10400-XA:2021 clause 5.2: Shading
Evidence point 4SANS 10400-XA:2021 Annex E: whole glazing element performance values