Sustainable Home Blueprint Sheet STEAM Engineering Challenge • Stage 1
Sustainable Home Blueprint
Grade 7 Design Lab
Lead Architect:
Team:
Date:
1
Define the Problem & Climate Challenge
Standard modern homes consume 40% of residential energy through artificial heating, cooling, and lighting. Identify the specific climate zone your home will endure (e.g., hot/arid, freezing tundra, humid subtropical) and specify the core ecological issues your design must solve.
Target Climate Zone & Extreme Weather Threat:
Core Ecological Problems (Thermal loss, high emissions, waste):
2
Suggested Sustainable Solutions
Review the four sustainable architecture pillars. Select at least three specific strategies your team will engineer into the prototype.
Passive Solar
South-facing glazing, extended roof overhangs, thermal mass flooring.
Envelope / Insulation
Double-pane air gaps, cellulose wool, clay plaster, tight draft barriers.
Natural Airflow
Cross-ventilation clerestory windows, thermal chimney stack effect.
Resource Cycles
Living green roof, rainwater catchment cistern, recycled local materials.
Team Strategy Rationale (Explain how your chosen 3 strategies solve your climate challenge):
3
Engineering Targets (Measurable Goals)
Target Interior \(\Delta T\): Max temperature swing allowed:
Renewable Element: Natural heating/cooling source:
Eco-Footprint Metric: Primary low-impact material:
EcoHabitats Design Challenge • Stage 1: Problem Definition & Strategy Page 1 of 2
Architectural Blueprint & Materials Schedule
Scale: 1 grid square = 0.5 m
4
Technical Blueprint (Floor Plan or Cross-Section Elevation)
Include: Compass Rose (North Arrow), Window Glazing, Shading Eaves, Air Vents
[ ] FLOOR PLAN [ ] ELEVATION
N
S
Grid: 20px = 0.5m
5
Bill of Materials & Thermal Specifications
List the prototype modeling materials (e.g., cardboard framing, felt/cotton insulation, foil radiant barrier, acetate glazing) and their real-world sustainable equivalent.
Building Component Prototype Material Real-World Eco Counterpart Thermal / Eco Function Walls / Frame Rammed earth / FSC timber Insulation Layer Hemp / Recycled denim Roof / Shading Sedum green roof / Overhang Windows / Glazing Triple-glazed Low-E glass Special Feature Rain collector / Solar chimney
Engineering Checkpoint: Teacher verification required before prototype construction starts.
Approved:
EcoHabitats Design Challenge • Stage 2: Technical Drawing & Specifications Page 2 of 2
Passive Architecture Slides STEAM Engineering Challenge
Grade 7 Design Lab
Green Blueprint:
Sustainable Architecture
Can we engineer a home that stays naturally cool in summer, warm in winter, and produces zero waste?
Lesson 1: Climate Challenges & Blueprinting Stage 01 • Design Phase
The Housing Energy Crisis Problem Statement
40%
Global Energy
Buildings consume nearly 40% of all energy worldwide, largely through heating and air conditioning.
Massive Carbon Cost
35%
Thermal Leaks
Poor insulation and unshaded windows allow massive heat gain in summer and escape in winter.
Inefficient Envelopes
Zero
Our Objective
Build a net-zero prototype that uses smart orientation, natural shade, and thermal barriers.
Biomimicry & Nature
Architects must engineer solutions before drawing lines. 02 / 05
Passive Engineering Toolkit Four Core Strategies
1. Solar Orientation
Position primary windows toward the winter sun path, with roof overhangs blocking steep summer rays.
2. Cross-Ventilation
Align high and low openings to exploit prevailing breezes and chimney convection effects.
3. Thermal Envelope
Multi-layer wall assemblies combining reflective radiant barriers and dense insulating bulk material.
4. Green Roof & Drainage
Vegetative layers absorb solar radiation, manage storm run-off, and add natural thermal mass.
Pick at least three strategies to incorporate into your blueprint. 03 / 05
Technical Drafting Rules Engineering Standards
1. Orientation
Draw a clear North arrow. In the northern hemisphere, position major living windows facing South for passive winter heat.
2. Exact Scale
Use the 20px grid provided. Each grid square equals 0.5 meters in real life. Ensure your model fits a 30 cm lab base.
3. Eco-Callouts
Label every architectural element with leader lines specifying material, purpose, and insulation layer thickness.
Engineers do not guess dimensions; every line has intent. 04 / 05
Team Action Protocol Next Steps
Stage 1 Checklist: Before Lab Construction
1 Identify your climate challenge and define your team's design goal.
2 Select 3 passive sustainable techniques and write your rationale.
3 Draft the scaled 2D blueprint with compass orientation and callouts.
Prototype Fabrication Guide STEAM Engineering Challenge • Stage 2
Prototype Fabrication Guide
Maker Lab Phase
Lead Fabricator:
Team:
Date:
1
Prototype Engineering Constraints
Every prototype must strictly observe the laboratory testing envelope to fit inside the standard heat test chamber.
Max Footprint: 25 cm × 25 cm base
Max Height: 18 cm to ridge beam
Sensor Port: 1 cm hole on north wall
Roof Panel: Removable for internal QA
2
Step-by-Step Assembly Protocol
Follow the sequential assembly order to ensure structural rigidity and airtight thermal envelope integrity.
A
Chassis & Subfloor:
Cut corrugated base to 25×25 cm. Lay down bottom insulation pad (thermal break) to prevent heat conduction through table contact.
B
Framing & Glazing Cutouts:
Erect structural cardboard wall framing. Cut south-facing solar aperture windows; seal acetate film with zero draft gaps.
C
Thermal Envelope Sandwich:
Install the 3-layer system: inner barrier → insulation core (cotton/felt/cellulose) → exterior reflective or weatherproof sheathing.
D
Roof Truss & Passive Shading Eaves:
Assemble pitched roof. Ensure south overhang extends 3-4 cm to simulate summer sun blocking. Fit ventilation port with damper.
3
Lab Team Specializations
Lead Structural Engineer: Oversees scale accuracy, square corners, and sturdy frame joints:
Thermal Barrier Specialist: Guarantees seamless insulation fit, eliminates drafts and thermal bridges:
EcoHabitats Design Challenge • Stage 2: Fabrication Protocol Page 1 of 2
Maker Log & As-Built Technical Section
Day 2 Lab Tracker
4
Live Fabrication Log (Document On-the-Fly Adjustments)
Engineering prototypes rarely match initial blueprints 100%. Record structural hurdles encountered during build and how you adapted.
Assembly Phase Unexpected Challenge / Flaw Engineering Pivot / Solution Implemented Foundation / Subfloor Wall Frames & Glazing Insulation Layers Roof Truss & Overhang
5
Model Assembly Slides Maker Lab Protocol
Stage 02 • Construction
Prototype Lab:
From 2D Blueprint to 3D Build
Translating architectural theory into a physical, thermally insulated scale model ready for stress testing.
Lesson 2: Physical Fabrication & Envelope Integrity Scale 1:25 Target
Testing Chamber Tolerances Dimensional Standards
25 cm
Base Footprint
Your home foundation must fit strictly within a 25 × 25 cm square boundary to fit on testing pedestals.
Max tolerance: +0.5 cm
18 cm
Peak Height
Total height to the roof ridge must not exceed 18 cm to ensure uniform heat lamp exposure distance.
Standardized distance
1.0 cm
Sensor Port
Leave a clean 1 cm circular port on the rear north wall for the digital thermal probe to enter the core.
Must seal during test
Models exceeding dimensions cannot fit under the testing lamps. 02 / 05
The 3-Layer Thermal Envelope Assembly Anatomy
01
Exterior Cladding
Reflective metallic barrier or light-colored shell to bounce away direct radiant heat from the sun lamp.
Simulates: Cool Roofs / Foil Barrier
02
Insulation Core
Dense fibrous layer (felt, cotton, recycled wool) trapping microscopic air pockets to arrest conductive transfer.
Simulates: Hemp / Cellulose Wool
03
Internal Lining
Airtight inner drywall barrier that prevents internal convection loops and seals all joint gaps tightly.
Simulates: Clay Plaster / Drywall
Zero thermal bridges: Do not let metal or uninsulated cardboard span directly outside to inside. 03 / 05
Maker Team Responsibilities Lab Workflow
Lead Structural Engineer
Cuts frame members to scale, aligns right angles, and ensures the structural walls do not warp under load.
Thermal Barrier Specialist
Fills insulation gaps, eliminates draft leaks around window acetate, and verifies the subfloor thermal break.
Materials & Waste Manager
Manages material inventory, tracks scrap recycling, and logs modifications into the maker guide.
Quality Control Auditor
Conducts the flashlight light-leak test, checks sensor clearance, and secures final teacher inspection.
High-performing teams communicate continuously during the build. 04 / 05
The Flashlight Leak Test Quality Assurance
Thermal Testing Matrix STEAM Engineering Challenge • Stage 3
Thermal Testing & Criteria Rubric
Stress Test Lab
Testing Lead:
Team:
Date:
1
Thermal Stress Test Data Log
Position the 100W heat lamp exactly 30 cm from the south facade. Record temperatures every 2 minutes for 12 minutes. Calculate \(\Delta T = T_{\text{Interior}} - T_{\text{Ambient}}\).
Elapsed Time 0 min (Baseline) 2 min 4 min 6 min 8 min 10 min 12 min (Peak) Chamber Ambient (\(^\circ\text{C}\)) Exterior Surface (\(^\circ\text{C}\)) Interior Living Space (\(^\circ\text{C}\)) Net Change \(\Delta T\) (\(^\circ\text{C}\)) 0.0
2
Engineering Criteria Evaluation Rubric
Evaluate prototype performance across all four design pillars (Score 1-4 per category; Max total: 16 points).
Criterion Exemplary (4 pts) Proficient (3 pts) Developing (2 pts) Score 1. Thermal Control Interior \(\Delta T \le 3^\circ\text{C}\); highly effective envelope Interior \(\Delta T \le 5^\circ\text{C}\); minor localized heat gain Interior \(\Delta T > 6^\circ\text{C}\); noticeable thermal breach /4 2. Passive Strategies 3+ distinct passive features flawlessly integrated 2 passive features integrated and functional 1 passive feature attempted or non-functional /4 3. Material Integrity Zero light gaps; sturdy joints; low-impact materials Sturdy frame; 1-2 minor draft leaks at seams Loose joints or multiple unsealed gaps /4 4. Climate Adaptation Explicitly solves target regional climate challenges Adequately addresses general climate threats Generic design with minimal climate focus /4
Redesign Showcase Slides Stress Test & Iteration
Stage 03 • Evaluation
Test, Evaluate & Refine:
The Redesign Cycle
Real engineers never stop at Version 1.0. Discover your prototype's thermal limits and re-engineer for peak efficiency.
Lesson 3: Empirical Testing & Iterative Architecture Iteration 2.0 Loop
Standardized Testing Setup 12-Minute Solar Run
30 cm
Uniform Distance
Position the 100W solar lamp exactly 30 cm from the south facade at a 45° angle.
Constant Solar Irradiance
2 Min
Recording Intervals
Log interior living space and exterior wall temps every 2 minutes for 12 continuous minutes.
Track the Heating Curve
≤ 3°C
Target ΔT
Exemplary passive homes maintain an interior temperature change under 3°C throughout the test.
Superior Thermal Mass
Maintain identical test variables across all team models for fair comparison. 02 / 05
Forensic Thermal Diagnostics Failure Mechanisms
Radiation Leak
Unshaded south windows acting like an oven greenhouse; lack of exterior louvers or overhang depth.
Fix: Extend roof overhang
Conduction Bridge
Wall insulation too thin or compressed, conducting heat directly through structural cardboard framing.
Fix: Add insulated thermal break
Convection Draft
Hot air entering via loose roof ridge joints or unsealed corner seams; stack effect drawing heat downward.
Fix: Seal seams & add top baffle
Look at where your temperature spiked to isolate the exact heat transfer vector. 03 / 05
Engineering Redesign (Iteration 2.0) Targeted Retrofits
1. Double Radiant Shield
Install an air space between two reflective foil barriers to bounce away infrared before it reaches the core.
2. Dynamic Shading Louvers
Add angled external louvers that shade windows completely from steep lamps while allowing ambient light.
3. Thermal Mass Reservoir
Introduce water vials or gravel tiles inside the floor substrate to absorb excess heat without rising in temp.
4. Document Redesign Blueprint
Draft your modified blueprint in Section 4 of your matrix before applying physical retrofits.
Every modification must be backed by thermal data from your test log. 04 / 05
Final Showcase Pitch Format 3-Minute Team Presentation
Presenting Your Sustainable Architecture
