Waste Calculator for the job in front of you.
Stop guessing one flat waste percentage. Calculate the field-shingle waste the roof actually needs, then use the result to bid retail work competitively and document insurance work clearly.
Clear inputs in. A job-ready answer out.
Roof waste is more than a flat percentage. Hips, valleys, rakes, handling, and the way materials are bundled all change what you need to order. The RestorationAI Waste Calculator separates the geometry-driven field-shingle calculation from cap and starter so you can see what is driving the quantity.
What is accurate roof waste worth on a retail job?
Let’s put real dollars to it with a typical 30-square roof.
If that roof really needs 7% and the bid carries 15%, the price can be more than $1,300 higher than it needs to be. That can be the difference between winning and losing the job.
Now flip it around. When every contractor uses 15% and the report calculates 7%, you can potentially come in $1,320 lower without cutting labor, markup, overhead, or profit. You are not giving anything away. You are estimating the roof more accurately.
Retail and insurance roofers use the same answer differently
- For retail roofing: price the roof from a calculated material need instead of the percentage you have always used. Order closer to what the job calls for, stay competitive, and protect the margin you planned.
- For insurance roofing: show why quantities vary by geometry. The report separates field shingles from cap and starter and records the measurements, math, and assumptions for a clearer review.
- For complicated roofs: accurate cuts both ways. If the roof needs more waste than your normal allowance, you can see it before signing the contract instead of absorbing unexpected material costs later.
Stop guessing 10%, 12%, or 15%. Calculate what the roof actually requires.
What you enter
A report that shows its work.
The report is built for review. It gives your team the result, the inputs behind it, and notes that make the calculation easier to understand later.
Fictional report example
- Summary of measured inputs
- Formula result and quantity to order
- Notes and assumptions for review
- Rendered pages ready to view in the tool
Run the numbers when you need them.
Start free with on-screen results. Upgrade when you need downloadable reports.
Open Waste Calculator
