This section covers the expected service life of exterior building elements, roofs, fences, decks and other outdoor structural components.
Useful starting points
- How long does a roof last?
- How long does a fence last?
- How long does a deck last?
- How long does a gutter system last?
- How long does a concrete patio last?
Why exterior lifespans vary so much
Weather exposure, drainage, coastal air, freeze-thaw cycles, timber treatment, installation quality and maintenance can have a greater effect outdoors than simple age. Two apparently similar structures can therefore have very different remaining lives.
Inspect condition, not just age
Look for water penetration, movement, cracking, rot, corrosion, loose fixings and drainage problems. Age is useful for budgeting, but visible deterioration and structural performance matter more when deciding whether repair is needed.
When to bring in a professional
Roof movement, structural cracking, significant timber decay, retaining-wall movement and other load-bearing defects should be assessed by a suitably competent person rather than diagnosed from a lifespan estimate alone.