Renovation 5th Edition — Chapter 2 Planning Your Renovation
Self‑DIY Edition │ 30-pyeong Old Tile-Roof House Remodeling Project
1. Property Snapshot
| Item | Description |
|---|---|
| Building Scale | Approx. 30-pyeong (99 m²) single-story + rooftop |
| Structure | Wood structure + tile roof |
| Current Issues | • Deteriorated roof waterproofing • Insufficient exterior wall insulation/waterproofing • Aged electrical/plumbing systems |
| Goals | • ZERO leaks • 20% reduction in heating/cooling costs • Minimal/Natural interior design |
2. Vision & Objectives
- Invest in the Foundation — Structure, insulation, and waterproofing are difficult to fix later, so they are the top priority.
- Reduce Maintenance Costs — Use high-efficiency windows/equipment, and maximize natural lighting and ventilation.
- DIY Completion — Design the project with segmented tasks so that work can proceed on weekends and evenings.
Must‑Know If goals are vague, both the budget and schedule will falter. Establish decision-making criteria by distinguishing between Need and Want.
3. Existing‑Conditions Assessment
3.1 Roof (Tiles & Rooftop Waterproofing)
- Check the condition of the waterproofing sheet under the tiles → Mark damaged areas.
- Calculate the area requiring rooftop urethane/polyurea coating.
3.2 Exterior Walls
- Detect condensation and leak points using a thermal imaging camera (rental).
- Record insulation thickness / existing finish layer thickness.
3.3 Interior
- Electrical wiring — Check for exposed wires and cracked insulation.
- Plumbing — Record main pipe diameter and signs of backflow.
Save photos, measurements, and notes in the Google Drive › Renovation › Survey folder.
4. Legal & Structural Constraints
- Zoning/Floor Area Ratio : View documents at the district office’s architecture department.
- Load-bearing Wall Identification : Mark the location of wood structure trusses and beams.
- Rooftop Waterproofing Permitting : Keep the waterproof layer performance certification (for defect insurance).
5. Concept → Working Drawings
| Stage | Outputs | Purpose |
|---|---|---|
| Concept | Bubble Diagram | Spatial relationships and circulation planning |
| Schematic | Floor Plan with Dimensions | Verify door/window placement and furniture layout |
| Working Drawings | Detailed Sections & Material Lists | Basis for estimates and construction |
SketchUp + Layout to draft drawings and maintain version history.
6. Budget & Schedule Framework
- Budget Allocation : Structure/Waterproofing 40% | Insulation 25% | Systems 20% | Finishes 15%.
- Slack (Buffer) : Secure 20% of the total duration as reserve days.
- Google Sheets : Create a master Gantt chart (utilizing a Drive template).
7. Material Strategy
| Work | Recommended Material | Selection Criteria |
|---|---|---|
| Rooftop Waterproofing | Polyurea Spray | 20+ year durability · Crack-bridging ability |
| Exterior Insulation | EPS 100 ㎜ + Ventilation Layer | Flame retardant · Low construction difficulty |
| Window Replacement | Low-E Double Glazed System Windows | Thermal transmittance of 1.0 W/㎡·K or lower |
| Interior Finish | Low-VOC Eco-friendly Paint | Improved indoor air quality |
8. 4‑Week Action List (Planning Phase)
| Week | Key Tasks | Detailed Instructions |
|---|---|---|
| Week 1 | Organize Need/Want | Family interview → Extract TOP 3 priorities |
| SketchUp Rough | 1 sketch before bed × 7 days | |
| Week 2 | Measure & Photograph | Laser measurement / Thermal imaging / Plumbing & Electrical photos |
| CAD Conversion | Hand sketch → Complete SketchUp model | |
| Week 3 | Legal/Constraint Research | Visit district office, confirm zoning, floor area ratio, load-bearing walls |
| Advance Schematic Drawings | 3 Bubble options → Finalize 1 Schematic option | |
| Week 4 | Working Drawings/Schedule | Create material specs, Gantt chart, budget table |
| Risk Assessment | Secure 20% buffer for roof/waterproofing/insulation processes |
9. Next Steps
In Chapter 3 ‘Tools’, we will organize how to select professional tools required for rooftop waterproofing and exterior wall insulation. Realize the budget by obtaining material quotes based on the planning documents.
Reference
Litchfield M., Harley C. Renovation: 5th Edition . Taunton Press, 2019.
AD