THE SHORT ANSWER
Estimate siding repair from the damaged area, matching product, access and condition of backing. Show purchased material apart from repaired wall area and state how concealed damage will be handled.
This guide follows a fictional 60 sq. ft. localized lap-siding repair in Toronto, Ontario. The linked exterior siding repair PDF example shows the scope and 6 separate costs in Canadian dollars. Treat it as a worked document, then use measurements, supplier quotes and labour inputs from your own project.
1. Mark the repair boundary
Photograph and measure the courses to be removed, including start and stop points. A localized repair should not imply full-wall replacement.
2. Check product compatibility
Match profile, thickness and finish as closely as the actual supplier options allow. The 72-square-foot allowance is a fictional purchase quantity for 60 square feet installed.
3. Inspect backing when opened
The base price assumes sound supporting material. If removal reveals damage, document it and obtain a revised scope before further repair.
4. Define finish expectations
Explain whether priming, painting and colour blending are included. A new siding piece may not visually match weathered adjacent material without separate finishing work.
Review the Canadian project address
For the 60 sq. ft. localized lap-siding repair in Toronto, Ontario, the example uses the measured trade units shown in its PDF. Residential jobs may mix square feet, linear feet, counts and supplier units; keep each line’s measurement basis visible. Check exposure, access, drainage and any concealed water damage at the property. Confirm the selected product and local approval requirements before setting the final scope. The figures are fictional CAD inputs, not a local price survey.
Describe which products the customer supplies and which the contractor supplies. State how any site condition outside the visible scope will be assessed and priced. Do not copy an allowance from another city or assume a sample’s tax entry establishes the treatment for this client.
Work through the exterior siding repair quantities
The matching PDF lets the client check each extension of quantity and unit rate. For this example, two useful checks are:
- Damaged siding removal: 60 sq. ft. × C$5.70 = C$342.00.
- Replacement siding allowance: 72 sq. ft. × C$14.00 = C$1,008.00.
Adding all 6 lines gives a C$3,115.00 illustrative subtotal. The PDF records 0% tax and C$3,115.00 as its total, before any markup. These are chosen sample inputs, not prices observed in Toronto, Ontario. The measurement basis matters as much as the rate: a material purchase allowance may be larger than the installed area, while a fixture count is not interchangeable with hours of labour.
Check the scope before sending
- Measure and photograph repair courses.
- Identify matching siding product.
- Confirm access and backing assumption.
- State finish and concealed-repair process.
Outside the illustrated scope: No structural repair, concealed moisture remediation, full-wall replacement, finish painting or multi-storey access.
Check the business and client names, property location, dates, quantities, unit rates and notes. Confirm tax, markup and any required approvals for the actual job. If selections or site conditions are unresolved, label the line as an allowance and explain how it will be updated.
Common questions
Why is material area larger than repaired area?
The example allows for cuts and stock sizes. Verify the actual purchase quantity against the selected product.
Will new siding match existing colour?
Do not assume a perfect match. Describe the product and any finishing work included before the customer accepts the scope.
Open the itemized exterior siding repair example and its app-exported PDF to see these decisions presented to a client. You can adapt the structure while replacing every fictional project input with your own.
