Deck Lifecycle
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Worked examples

Follow hypothetical scenarios and see how the calculation works.

Hypothetical ten-year costs: 12000 dollars now, 300 dollars each year and 1800 dollars in year six; cash total 16800 and present value 16066.53 at 3 percent real rate.
Hypothetical amounts, not market prices or maintenance requirements. Future costs occur at year-end. Open full-size diagram · Download SVG
Ownership horizon diagram includes costs through the final year and excludes later events without predicting material life.
A study horizon is a chosen comparison window, not a promised service life. Open full-size diagram · Download SVG

Work through a complete example

These scenarios demonstrate methods. The numbers and scenes are illustrative, not documented customer projects, current prices or verified material results.

Hypothetical ten-year baseline

An owner enters $12,000 initially, $300 at each year end for ten years, and $1,800 at the end of year six. The undiscounted total is $16,800 in today's dollars. At a three percent real rate, present value is $16,066.53. These invented amounts demonstrate timing; they are neither prices nor a recommended maintenance schedule.

Read the method: Start with the ownership question

Hypothetical overlap caught early

Suppose a $9,000 project quote already includes a $250 delivery charge. Adding delivery again would incorrectly make initial cost $9,250. An owner checks the quote and enters $9,000. Separately, the owner assigns a hypothetical $180 annual care allowance and a $900 event in year five. None of these figures is a market estimate.

Read the method: Build a cost inventory you can trace

Hypothetical annual allowance and separate event

An owner models $200 annually for eight years and an additional $1,000 event in year four. Future undiscounted spending is $2,600. If the $200 annual allowance already contained a share of that event, the model would double count it. The owner documents that the two allowances cover different work. These dates describe an invented scenario, not recommended intervals.

Read the method: Building a deck maintenance cost schedule
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