Cost Estimator — Cheat Sheet
Quick-reference cheat sheet for the Cost Estimator tool.
Published 27 May 2026
Cost Estimator
Quick-reference companion for the free Portal tool
What This Tool Does
The Blind Solutions Architects Portal's Cost Estimator is an invaluable preliminary budgeting tool designed specifically for South African architects. It provides a quick, indicative cost estimate for various glazing solutions, helping you and your clients understand the financial implications of different design choices early in the project lifecycle. This tool is crucial for initial client consultations, feasibility studies, and concept design phases where detailed quotations are not yet required but a reliable cost indication is essential.
Use this tool when you need to compare the cost impact of various window and door specifications (e.g., single vs. double glazing, different frame materials, U-values, SHGC values) without waiting for supplier quotes. It empowers you to guide clients towards cost-effective and energy-efficient solutions that comply with SANS 10400-XA regulations, thereby streamlining your design process and managing client expectations effectively.
Step-by-Step Usage Guide
Navigate to the "Tools" section on the Blind Solutions Architects Portal and select "Cost Estimator." Ensure you are logged in to access all features.
Input your project's location. This is crucial for accurate climate zone assessment, which influences energy performance calculations and, consequently, material recommendations. For instance, enter "Johannesburg, Gauteng, South Africa". The tool will automatically identify Climate Zone 2 (Temperate Interior).
Add your window/door elements. For each element, specify its dimensions (width x height in meters), orientation (e.g., North, East), and initial glazing type.
- Area Name: Living Room Window 1
- Width: 2.5 m
- Height: 1.8 m
- Orientation: North
- Initial Glazing Type: Standard Clear Monolithic 6mm
For more accurate estimates and SANS 10400-XA compliance checks, input target U-value and SHGC (Solar Heat Gain Coefficient) if you have them. The tool will suggest glazing options that meet these targets.
- Target U-value: 3.5 W/m²K
- Target SHGC: 0.45
Choose your preferred frame material (e.g., Aluminium, uPVC, Timber) and any specific features like low-e coatings, argon gas fill, or specific frame profiles. These selections significantly impact both cost and performance.
- Frame Material: Aluminium (Thermal Break)
- Low-E Coating: Yes (Soft Coat)
- Gas Fill: Argon
Click "Generate Estimate." The tool will display a breakdown of costs per element and a total project estimate. Review the results, compare different scenarios, and export the report for client presentations or internal documentation.
Common Scenarios & Expected Results
| Scenario | Input | Expected Output |
|---|---|---|
| Budget-Friendly Residential |
Location: Cape Town (Climate Zone 4) Element: 1.5x1.2m window, West facing Glazing: Standard Clear Monolithic 6mm Frame: Standard Aluminium (non-thermal break) |
Lower end of cost range. U-value likely > 5.0 W/m²K, SHGC ~0.8. Warning: May not meet SANS 10400-XA for thermal performance in hot climates without shading. |
| Energy-Efficient Office |
Location: Pretoria (Climate Zone 2) Element: 3.0x2.4m facade, North facing Glazing: Double Glazed (6mm Clear + 12mm Argon + 6mm Low-E) Frame: Aluminium with Thermal Break |
Mid-to-high cost range. U-value ~1.8-2.2 W/m²K, SHGC ~0.3-0.4. Likely compliant with SANS 10400-XA for thermal performance. |
| High-Performance Home |
Location: Drakensberg Foothills (Climate Zone 1) Element: 2.0x2.1m sliding door, East facing Glazing: Triple Glazed (6mm Low-E + 12mm Argon + 6mm Clear + 12mm Argon + 6mm Low-E) Frame: uPVC Multi-chambered |
Higher end of cost range. U-value < 1.0 W/m²K, SHGC ~0.25-0.35. Excellent thermal and acoustic performance, ideal for extreme climates. |