Siding is bought on installed price and paid for over decades. The two orders are not the same.
Expected service life
| Material | Typical life | What ends it |
|---|---|---|
| Vinyl | 20–40 years | fading, brittleness, impact cracks |
| Insulated vinyl | 25–40 years | same |
| Engineered wood | 20–30 years | moisture at cut ends and bottom edges |
| Fiber cement | 30–50 years | rarely the board; usually the paint or the install |
| Wood | 20–40 years | rot where it stays wet |
| Brick and stone | 75+ years | mortar joints, not the units |
These assume the wall behind it is dry. Any cladding over a wall with failed flashing has a much shorter life, and the cladding is not what failed.
What each one asks for
Vinyl. Washing every year or two. No painting — and, importantly, most vinyl cannot be painted a darker colour without deforming.
Fiber cement. Repainting every 10–15 years, and caulk at joints and trim inspected on the same cycle. This is the large recurring cost.
Engineered wood. Repainting on a similar cycle, and closer attention to cut ends and the bottom course.
Wood. Painting or staining every 5–10 years depending on exposure, plus replacement of individual boards.
The number that changes the ranking
Repainting a house costs several thousand dollars. Over 40 years that is three repaints for fiber cement and six or more for wood.
Vinyl over the same period is washing and, eventually, replacement.
Which comes out cheaper depends on the local cost of painting, the size of the house, and how long the owner keeps it. There is no universal answer, and any source that gives one has picked its assumptions to reach it.
The honest short-ownership case
If a house will be sold within five to seven years, lifetime cost is largely someone else's. What matters is installed price and kerb appeal at sale.
That is a legitimate way to decide, and it is worth saying out loud rather than pretending a 40-year calculation is being made.
Maintenance that applies to everything
Keep it clear of the ground and of anything that holds moisture against it — soil, mulch, a deck built too high.
Trim the planting back. Shrubs against a wall keep it damp and hide problems.
Clean the gutters. Overflowing gutters run down the wall and are behind a large share of siding and sheathing failures.
Look at it once a year, particularly below windows and at the bottom course, which is where problems appear first.
What actually fails first
In practice it is rarely the cladding material. It is the caulk at trim joints, the flashing over a window that was never there, and the bottom course sitting in soil.
All three are cheap to correct and expensive to ignore, and none of them is affected by which material was chosen.
Warranties and what they actually cover
Most siding warranties cover the material against manufacturing defect, and most siding problems are installation or water management rather than defect.
Read for three things: whether the cover is prorated by year, whether it transfers to a subsequent owner, and whether it is voided by installation outside the manufacturer's instructions.
That last one matters more than it sounds, because the expansion and fastening rules that installers most commonly break are exactly the manufacturer's instructions the warranty refers to.
Fading is not a defect
Every pigmented cladding lightens with ultraviolet exposure, and the south and west elevations lighten faster than the north.
Darker colours show it more, and a wall repaired with stored original material after fifteen years will show the difference. That is normal weathering rather than a failure, and it is a reason to prefer mid-tone colours on long-exposure walls.