Roof Details
Story breakdown, work zones, ventilation and codes. This view adds details without repeating the measurement sheets.
4100 Example Ridge Drive, Plano, TX 75024 (synthetic). Made-up example data, not a measurement of a real home.
Additional roof planning details
Roof Details
4100 Example Ridge Drive, Plano, TX 75024
About this sample
Story breakdown, work zones, ventilation and codes. This view adds details without repeating the measurement sheets.
Read alongside Roof Measurements
The roof plan, facet and edge ledgers, dimensions and pitch sheets are published once in the Roof Measurements sample. Material Takeoff owns the complete quantity matrix.
These examples use synthetic data. Codes and ventilation assumptions require project-specific verification before installation.
Premium · Levels
Story breakdown
4100 Example Ridge Drive, Plano, TX 75024
- Main level
- 22.07 sq
- 2,207 sq ft · 7 facets
- Upper level (2+ stories)
- 29.19 sq
- 2,919 sq ft · 10 facets
| Level | Facets | Area sq ft | Squares | Share |
|---|---|---|---|---|
| Main level | 7 | 2,207 | 22.07 | 43% |
| Upper level (2+ stories) | 10 | 2,919 | 29.19 | 57% |
- Main level
- Upper level (2+ stories)
Level comes from the eave height of each roof section. Upper-level roofs usually need more staging and safety equipment; price them accordingly.
Premium · Work zones
Pitch zones and complexity hotspots
4100 Example Ridge Drive, Plano, TX 75024
Roof area by pitch band
Hotspots
- 6 valleys to cut and line with ice and water barrier.
- 20 wall-flashing lines where roofs meet walls, dormers or the chimney.
- 6 distinct pitches; each change is a cut line.
Pitch bands follow the 05 §4.1 classes on unrounded pitch. They describe the roof, not a safety rating; follow your own fall-protection plan.
Premium · Ventilation
Attic ventilation
4100 Example Ridge Drive, Plano, TX 75024
- Attic floor
- 4,096 sq ft
- plan area, not roof surface
- Net free area required
- 1,966 sq in
- 1/300 of the attic floor
- Exhaust / intake
- 983 / 983 sq in
- 50% high · 50% low
- Ridge / eave available
- 77' / 364'
- usable runs
- Ridge vent runs76' 10"
- Intake at eaves363' 11"
- Open cover — no attic below
Exhaust (high) — 983 sq in required
| Product | Net free area | Quantity | Provides | Run allows | Status |
|---|---|---|---|---|---|
| Shingle-over ridge vent, 4 ft | 18 sq in/ft · 4' pieces | 14 pieces | 1,008 sq in | 1,383 sq in | Sufficient |
| Static box vent (roof louver) | 50 sq in each | 20 each | 1,000 sq in | No run limit | Sufficient |
Products are alternatives: use one per position, never add them together.
Intake (low) — 983 sq in required
| Product | Net free area | Quantity | Provides | Run allows | Status |
|---|---|---|---|---|---|
| Continuous soffit vent, 8 ft strips | 9 sq in/ft · 8' pieces | 14 pieces | 1,008 sq in | 3,276 sq in | Sufficient |
| Vented drip edge, 10 ft pieces | 9 sq in/ft · 10' pieces | 11 pieces | 990 sq in | 3,276 sq in | Sufficient |
Products are alternatives: use one per position, never add them together.
IRC 2021 R806.2 exception: 1/300 of the attic floor, 4,096 sq ft × 144 ÷ 300 = 1,966 sq in of net free area. Sample assumption: ridge exhaust supplies 50% of the required area within 3 ft of the ridge and eave intake the rest, and the vapor-retarder condition is treated as not applicable (it applies in climate zones 6–8). A real report records the adopted code edition, local amendments and climate zone.
Exhaust 50% high on the roof, intake the rest at the eaves.
Products at one position are alternatives; use one exhaust type per attic, since mixing ridge and box vents can short-circuit the airflow.
Keep intake at or above exhaust so the exhaust draws air in through the eaves.
Net free area values are sample presets pending review; use the chosen product’s published NFA.
With the highlighted products, intake is at least equal to exhaust.
Attic floor: plan area of the roofs over the attic, 4,096 sq ft; open porch and patio covers (398 sq ft) have no attic. Synthetic sample geometry.
Intake run: eaves over the attic, 363' 11"; dormer ridges and open-cover eaves are not used.
Premium · Codes and climate
Building codes and climate
4100 Example Ridge Drive, Plano, TX 75024
Plano, TX (fictional sample address) · 2021 IRC as locally adopted — illustrative
- Climate zone
- 3A (warm, humid)
- Design wind
- 115 mph (illustrative)
- Ground snow
- 5 psf (illustrative)
- Rainfall intensity
- 3.8 in/hr (illustrative)
- Hail exposure
- High — North Texas hail region
Roofing requirements to confirm with the building department
| Topic | Requirement | Reference |
|---|---|---|
| Underlayment | Required under asphalt shingles; two layers where the slope is 2/12 to less than 4/12. | IRC R905.1.1 |
| Minimum slope | Asphalt shingles only on slopes of 2/12 or greater. | IRC R905.2.2 |
| Drip edge | Required at eaves and rake edges of shingle roofs. | IRC R905.2.8.5 |
| Valleys | Valley lining per the code options or the shingle manufacturer’s instructions. | IRC R905.2.8.2 |
| Sidewall flashing | Step flashing where the roof meets a sidewall, at least 4 in by 4 in. | IRC R905.2.8.3 |
| Wind resistance | Shingles classified for the design wind speed (ASTM D7158 or D3161). | IRC R905.2.4.1 |
| Attic ventilation | Net free area 1/150 of the vented space, or 1/300 when the conditions in the section are met. | IRC R806.2 |
| Reroofing | No recover over two or more existing layers; tear off to the deck. | IRC R908.3.1.1 |
Sources and limitations
Evidence, checks and limitations
4100 Example Ridge Drive, Plano, TX 75024
This report
- Report
- RK-2026-0925-S4R1-R3 · v1
- Generated
- Sep 25, 2026
- Measurement grade
- A — Sample grade
- Imagery date
- Mar 1, 2026
- Geometry
- RoofKarma synthetic massing model (roof-build v1)
- Calculation
- roof-analysis v1 · complexity-policy-v1
- Template
- report-book@1 · R3
Why this grade
Shown as grade A to demonstrate a complete report. A real report is graded from its source quality, obstruction and automated checks; grade D withholds prices and orderable quantities.
Automated quality checks
| Automated check | Result | Detail |
|---|---|---|
| Every facet closes | Passed | All 17 facets are closed planar polygons. |
| Every line is classified | Passed | No unclassified line; each is an eave, rake, ridge, hip, valley or flashing line. |
| Shared lines counted once | Passed | Ridges, hips and valleys shared by two facets are single lines in every total. |
| Pitch within 0/12 to 24/12 | Passed | Every facet pitch is within the modelled range. |
| Totals recompute exactly | Passed | Facet areas sum to 5,125 sq ft before display rounding. |
| Structures in scope | Note | Detached workshop not included in totals (selectable). |
| Source | Note | Synthetic sample geometry. A real report states its imagery source, date and quality here. |
Check at the property
- Confirm valley and wall-flashing lengths where lower roofs meet walls.
- Check chimney and skylight flashing condition and whether kits will be replaced.
- Count vents and pipe boots; the drawing shows what is visible from above.
- Confirm tear-off layers and decking before finalising the order.
Limitations
- Every figure in this sample comes from an invented house built to exercise the report; it is not a surveyed property.
- Measurements come from above: wall heights, decking condition and the number of layers are not visible from the air.
- No accuracy or certification is claimed; a roofer confirms quantities on site before ordering.