Care & longevity
How Many Years Should a Fence Actually Give You?
Lifespan is set less by the boarding than by three things: the posts, whether timber ever sits in wet soil, and whether anyone treats it.
Ask three people how long a fence lasts and you will get three numbers, all confidently stated. The spread is real, because the same fence style can genuinely give you either a handful of years or a couple of decades depending on how it was built and what happened afterwards.
The ranges below are what we see in gardens across London and Hertfordshire, and the factors underneath them explain where in each range yours will land.
Realistic ranges by type
Treat the lower end as the poorly specified version and the upper end as the properly built and maintained one.
| Type | Typical range | What usually ends it |
|---|---|---|
| Lap panel, timber posts | Shortest | Post rot at ground level |
| Lap panel, concrete posts | Longer | Panels sagging and thinning boards |
| Closeboard, concrete posts | Long | Boarding weathering, replaceable individually |
| Composite | Longest of the timber alternatives | System components rather than boards |
| Galvanised and coated metal | Very long | Damage to the finish exposing bare metal |
The four things that decide where you land
None of these are exotic. They are the four questions we would ask about any fence to guess its remaining life.
- Post type, because rot at the soil line ends more fences than anything else
- Whether a gravel board keeps the boarding clear of wet ground
- How exposed the boundary is to wind, and whether the style suits that
- Whether it has ever been treated, and how the base of the fence drains
Why the post goes first
At ground level timber is repeatedly wet then dry with plenty of oxygen, which is ideal for decay. The result is a post that looks sound at eye level and is nearly gone at the base. This is exactly why a fence that has stood through years of weather can come down in a single ordinary gust.
How to add years cheaply
Keeping soil, compost and bark off the bottom of the boarding does more than any product. Clearing plant growth off the fence face so it dries out after rain helps too, and repairing one broken board promptly stops water tracking into the rails behind it.
- Keep raised beds and soil away from the base of the fence
- Cut back growth so the face can dry after rain
- Fix single damaged boards before the rails behind them get wet
- Re-treat softwood before it looks grey rather than after
Not sure where yours is in its life?
A quick honest look will tell you whether you are looking at repairs for a few more years or a replacement worth budgeting for. Ask us and we will say which, even when the answer is that it will see out a few more winters. Use the contact page.
Frequently asked
What part of a fence fails first?
The posts, almost always at ground level, where timber is repeatedly wet and dry. Boarding usually still has life in it when the posts have gone.
Does treating a fence really extend its life?
It helps the boarding meaningfully, particularly on softwood. It does far less for the buried section of a post, which is why post choice matters more.
Do gravel boards make a fence last longer?
Yes, by keeping the boarding out of wet soil. It is one of the cheapest specification decisions with a real effect on lifespan.
Does composite fencing last longer than timber?
Longer than untreated softwood, clearly. The comparison against well specified closeboard on concrete posts is closer than the marketing suggests.
Can a fence be made to last longer after it is built?
Within limits. Keeping soil and planting off it, treating the boarding and repairing damage promptly all add years without any rebuild.
Wondering how long yours has left?
We will give you an honest answer, including when that answer is that it will see out a few more winters yet.