Introduction
This case study is hypothetical and illustrative — a worked example with realistic numbers, not a report of an actual project. It follows a typical single-story ranch through a full fascia replacement: measuring, material choice, cost buildup, and the decisions that change the outcome. Use it as a template for planning your own project.
To run the same math on your own house, the Fascia Calculator takes your roof-edge measurements and returns linear footage and board counts in imperial and metric.
The House (Hypothetical)
- Type: single-story ranch, 1,800 sq ft, built 1994
- Footprint: 30 ft wide × 60 ft deep (9.14 m × 18.29 m)
- Roof: simple gable, 6/12 pitch, 1-ft (0.30 m) gable-end overhangs
- Existing fascia: original painted pine 2×6, peeling on the south and west elevations, soft spots at two corners
- Gutters: aluminum, 12 years old, sound — to be removed and rehung
- Access: flat lot, single story, ladder-friendly on all sides
Step 1: The Takeoff
Following the estimating guide method — sketch, number segments, measure each:
Eaves: 60-ft walls + 1-ft overhangs each end = 62 ft per eave; two eaves = 124 ft.
Rakes: half-span 15 ft, rise at 6/12 = 7.5 ft; rake = √(15² + 7.5²) = 16.77 ft; four rakes = 67.08 ft.
Measured total: 124 + 67.08 = 191.08 linear ft.
With 10% waste: 191.08 × 1.10 = 210.19 ft → 211 linear ft to order.
Boards: 210.19 ÷ 16 = 13.14 → 14 sixteen-foot boards, plus one spare = 15 boards ordered.
Metric cross-check: 18.29 m walls + 0.30 m overhangs = 18.90 m eaves × 2 = 37.80 m; rakes 4 × 5.11 m = 20.45 m; total 58.25 m; × 1.10 = 64.08 m; ÷ 4.9 m boards = 13.08 → 14 boards. Same result.
Step 2: The Material Decision
The homeowner compared three options from the material guide:
| Option | Material cost (211 ft) | Maintenance | Verdict |
|---|---|---|---|
| Cedar 2×6, DIY painted | 211 × $3.50 = $739 | Repaint every 5–7 yrs | Cheapest today, most upkeep |
| PVC 2×6 equivalent, DIY | 211 × $4.50 = $950 | None | Best DIY value long-term |
| Aluminum-wrapped, pro installed | Quoted installed (below) | Highest quote, zero upkeep | |
Decision: PVC, DIY — the house is a long-term hold, the eaves are hard to repaint on the north side behind mature trees, and the owner is comfortable with the expansion-gap installation method.
Step 3: The Full DIY Budget
| Line item | Calculation | Cost |
|---|---|---|
| PVC fascia boards (15 × 16 ft) | 15 × $72 | $1,080 |
| Drip edge (22 × 10-ft pieces) | 22 × $12 | $264 |
| Fasteners, sealant, touch-up paint | lump | $120 |
| Ladder stabilizer (didn’t own one) | 1 × $85 | $85 |
| DIY total | $1,549 |
For comparison, the pro quotes for aluminum-wrapped came in at $2,950 and $3,400 — roughly $14–$16/ft, at the top of the cost guide’s range because the quotes included gutter removal/rehang and minor soffit repair.
Step 4: What the Demo Revealed
Tear-off found what the soft spots suggested: six rafter tails with rot at the two damp corners — the rest were sound. This is the contingency the cost guide warns about. The fix: sister new tail sections alongside the damaged ones, a half-day of carpentry with $60 in lumber. Because the owner had budgeted a 15% contingency ($230), the surprise was absorbed without stress.
It also revealed the original water source: the drip edge had been installed behind the old fascia’s top edge instead of lapped over it — water ran down the shingles and straight behind the boards for 30 years. The new drip edge went on in the code-correct position, per the code compliance guide.
Step 5: The Installation (4 Days)
- Day 1: gutter removal, fascia tear-off, rafter-tail inspection and sistering.
- Day 2: soffit touch-ups, first elevation of PVC hung — scarf joints on rafter tails, expansion gaps per manufacturer spec.
- Day 3: remaining elevations hung; outside corners mitered.
- Day 4: drip edge installed, gutters rehung with corrected pitch (¼ in per 10 ft toward downspouts), sealant at top edges.
Total hands-on time: about 30 hours across two people. No painting needed — the key PVC payoff.
Lessons from This Illustrative Project
- The takeoff held. 14 boards used of 15 ordered — the spare covered one miscut miter. The 10% waste allowance was exactly right for a simple gable roofline.
- The contingency earned its keep. Six rotted tails would have been a budget crisis without the 15% buffer.
- Diagnose the water source during demo. The mis-sequenced drip edge explained 30 years of rot; the new detail fixes it permanently.
- Material choice matched the situation. PVC’s zero-maintenance won because the owner plans to stay and the north eave is hard to service — on a flip, painted wood would have been the economical pick.
- The hybrid saved the most. DIY carpentry + pro-grade material landed at $1,549 — under half the pro quotes — because the roofline was simple and single-story.
Related Guides
- Complete Fascia Guide — the sizing and measuring basics behind this takeoff.
- Fascia Cost Guide — build your own budget line by line.
- DIY vs Pro — the decision framework this project followed.
- Fascia Replacement Checklist — the step sequence in checklist form.
- Common Mistakes — the errors this project avoided.
Frequently Asked Questions
Is this case study a real project?
No — it’s a hypothetical, illustrative example built from typical dimensions, standard material prices, and common job-site findings. Your measurements, costs, and surprises will differ; use it as a planning template, not a quote.
How much contingency should I budget?
Ten to fifteen percent above the material and labor estimate. Hidden rafter-tail rot is the most common surprise, and it’s discovered only after the old boards come off.
How long does a fascia replacement take?
A simple single-story house: 1–2 days for a pro crew, 3–5 days for a DIYer working with a helper. Complex rooflines, rot repair, and painting add time.
Should gutters be replaced at the same time?
Not necessarily — sound gutters can be removed and rehung, as in this example. Replace them if they’re leaking, sagging, or near end of life; bundling the work saves a second mobilization.
Plan Your Own Project
Every real project follows this one’s arc: measure carefully, choose material for your situation, budget a contingency, fix the water source — not just the board. Start with the Fascia Calculator for your takeoff, then work the replacement checklist step by step.
Disclaimer: This case study is hypothetical and illustrative — not a real project, quote, or guarantee of results. Actual material needs, costs, and site conditions vary. Verify measurements with your contractor and consult a licensed professional for structural or code-related decisions.
