Roof ridge cap pieces.
Measure the specified ridge runs and separate any distinct end products.
Read the right quantitative data
Nominal cap length and the supplied overlap or effective coverage.
Check this ordering assumption
Nominal stock length is not installed coverage when every cap overlaps the next.
The ridge detail and required lap are supplied inputs.
A worked quantity method
This illustrative set of supplied inputs demonstrates Ridge Cap Effective Cover Calculator. Replace the example measurements and product figures with your own before ordering.
| Supplied input | Metric display | US display |
|---|---|---|
| Physical cap length | 1 m | 3.28 ft |
| Specified overlap | 100 mm | 3.94 in |
| Ridge run 1: Measured ridge length | 5 m | 16.4 ft |
Ridge cap pieces: 6 pieces
- Total ridge run length
- 5 m
Your measurement and product-data sheet
Record what you know and mark verified items ready. Notes save on this browser after you edit them. Download a copy before clearing browser data.
Measure the specified ridge runs and separate any distinct end products.
Nominal cap length and the supplied overlap or effective coverage.
Nominal stock length is not installed coverage when every cap overlaps the next.
Input for Ridge Cap Effective Cover Calculator. Record the value with its unit and quantity basis.
Input for Ridge Cap Effective Cover Calculator. Record the value with its unit and quantity basis.
Input for Ridge Cap Effective Cover Calculator. Record the value with its unit and quantity basis.
Choose your next calculation
Ridge Cap Effective Cover Calculator
Count cap pieces across supplied ridge runs using the effective exposed length after specified overlap.
Stock Cut List Calculator
Group required straight cuts into available equal-length stock, allowing for kerf and end trimming.
Turn the estimate into an order
- Confirm that all quantities use the same measured basis and the selected product's current data.
- Keep different products, finishes and handed variants in separate purchase lines.
- Review exact demand and whole-pack purchase quantities before entering your quoted prices.
- Record compatible stock already on hand, then save the remaining order in your browser project.
Measurement and purchase guides
- Apply banding cut allowance to every selected edge
- A reproducible two-stock cut plan can still cost more than another plan
- Keep first-emitter offset in a specified dripline takeoff
- Purchased stock length is not installed finished length
- Do not pool ridge lengths without checking cap cuts and overlaps
- Keep vertical route sections in a length takeoff
Other materials in this family
Reviewed 6 October 2026. Geometry and purchase arithmetic use your measurements and selected specifications. Calculation scope.