Permitted development height limits
Height allowances differ between the front of a plot and the side or rear boundary, and drop further again near a highway where sightlines for road users have to be kept clear. We check the specific limit for the boundary in question rather than quoting a blanket height.
Conservation designation can reduce what's permitted even further, and a boundary next to a corner plot has its own separate sightline rule — both are checked against the site before a height is put on a quote.
Sloped gardens and retaining
A sloping plot usually rules out a single level run of panel fencing — the choice is between stepping the fence in even drops between posts, or raking the panels to follow the slope continuously.
Stepped runs look tidier on a steeper gradient and are simpler to repair panel-by-panel; raked runs suit a gentler, more even slope and avoid the small triangular gaps a stepped fence leaves underneath.
Where the drop is severe enough to need a retaining structure rather than just a stepped fence, that's a different job with its own drainage and engineering requirements, not something to bolt onto a fencing quote as an afterthought.
Fencing a boundary alongside a watercourse
A boundary running alongside a stream, ditch or river usually needs consent from the relevant authority before fencing work close to the watercourse, since works within a defined distance of the bank can affect flood flow or maintenance access.
Posts are kept clear of the bank edge itself where erosion risk is present, and a fence design that could trap floating debris during high flow is generally avoided in favour of an open rail or wire design on that specific stretch.
Why replacement panels sometimes need different post spacing to the originals
Panel sizing has changed slightly over past decades, and a fence originally built to an older standard width may not have a modern replacement panel that fits the existing post spacing exactly.
This becomes relevant on a partial repair where only some panels are being replaced and the remaining posts are staying in place, since a small mismatch can mean trimming a new panel down or accepting a slightly wider or narrower final bay.
It's worth measuring the actual existing post-to-post distance rather than assuming a 'standard' width will match, particularly on an older fence being partially rather than fully replaced.
Diagonal bracing struts on gate posts
A diagonal timber or metal strut run from partway up a gate post back to a buried anchor or second post resists the twisting and leaning force a heavy gate exerts on its hinge post over time, particularly on wide or heavy gates.
Without bracing, that twisting load is carried entirely by the post's own embedment in the ground, which can gradually work the post out of true even where the concrete footing itself remains intact.
Bracing is generally specified based on gate weight and width rather than applied universally, since a light pedestrian gate rarely generates enough leverage to need it while a wide vehicle gate almost always does.
Concrete cure time before a post can be loaded
A post set in fast-setting postcrete can usually take light loading within an hour or two, but a full concrete footing needs several days of cure before it should be relied on for the lateral loading a security fence or gate applies.
Fitting a heavy gate leaf to a post before its footing has properly cured can rock the post out of plumb before the concrete has reached working strength, which is a common avoidable cause of an early lean on a new installation.
Timber species and on-site workability
Workability describes how easily a timber can be sawn, planed, nailed and screwed without splitting, tearing or blunting tools excessively, and it varies considerably between species independent of durability or strength.
Straight-grained, moderate-density softwoods like redwood pine are generally easier to work on site than dense hardwoods or highly figured timber with interlocked or wavy grain, which can tear out during cutting or planing.
A timber chosen purely for durability or appearance without considering workability can significantly slow on-site fitting, particularly where a lot of site cutting and drilling is needed rather than factory-machined components.
Rubber buffer pads at double-gate meeting stiles
A rubber buffer pad fitted where two gate leaves meet or where a gate meets its stop cushions the impact of closing, reducing wear on the timber or metal edge and quietening what would otherwise be a hard knock each time.
These pads perish with UV and weather exposure over time and need replacing periodically, since a hardened, cracked pad no longer cushions the impact it was fitted to absorb.
Siberian larch as a fencing timber
Siberian larch grows slowly in a cold climate, which produces a dense, tight-grained timber with better natural durability than most fast-grown European softwoods, without needing pressure treatment in many applications.
It's noticeably harder to nail and screw without pre-drilling than typical treated pine, and a nail driven in at the wrong angle is more likely to split the board than sink cleanly.
Left unfinished it weathers to a silvery grey similar to cedar, though its higher density means it holds up somewhat better to knocks and general handling on site.
Choosing post hole diameter for the post size
A hole cut too close to the post's own width leaves no room for concrete to fully surround it, which weakens the base and gives water a direct channel down alongside the timber rather than a solid seal.
A generally quoted rule is a hole roughly three times the post's width, so a 100mm post wants in the region of a 300mm diameter hole, adjusted upward on poor ground or for taller, more heavily loaded posts such as gate posts.
Oversized holes aren't free either — they use more concrete and take longer to backfill and haunch neatly, so the aim is the right diameter for the post and ground rather than simply digging as wide as convenient.
Pressure treatment and incising
Pressure treatment (vacuum-pressure impregnation) forces preservative into the timber under pressure rather than just coating the surface, which is why treated softwood outperforms a surface-brushed equivalent even though both can look similar when new.
Denser softwoods such as redwood resist deep penetration, so posts and other high-risk sections are often incised first — small slits cut into the surface — to let preservative reach further into the timber than it otherwise would.
Incising leaves a visible pattern of shallow cuts on the timber face, which is a normal sign of proper treatment rather than a defect, though it's more noticeable on posts than on finish-grade boards.
Quick-set post mix versus mixed concrete
A quick-set post concrete cures within a few hours and is convenient for a single-post repair where the fence needs to take load again quickly, but a standard mixed concrete generally gives a denser, longer-lasting footing for a larger job.
For a repair affecting several posts along a run, mixed concrete is usually the more durable choice even though it takes longer to reach working strength.
Repair versus replace decision criteria
The decision between repairing and replacing usually comes down to what proportion of a run is affected and how sound the unaffected timber is — a single failed post on an otherwise good run favours a repair, while widespread rot along several bays tips toward replacement.
Age of the existing timber matters too, since a repair fitted into a fence already near the end of its working life may only buy a season or two before further failures appear elsewhere.
Bin and bike access considerations
A gate used regularly to move bins or bikes through needs enough clear width and a low enough threshold that wheels don't catch, which is a different design priority to a gate that's mostly left closed.
Where this is the main use of a side gate, we factor it into leaf width and threshold detail at repair or replacement time rather than defaulting to a standard pedestrian gate size.
Noise and timing considerations on a repair
Cutting timber or breaking out old concrete can be noisy, and giving a neighbour advance notice of a repair on a shared boundary avoids unnecessary friction, particularly on a terraced row where several gardens sit close together.
Timing louder stages of a repair to reasonable hours is a simple courtesy that costs nothing and reduces complaints on tightly packed sites.
Seasonal ground conditions affecting installation
Clay ground shrinks and cracks in a dry summer and swells again over winter, which can loosen a post fixed during one season and tightened again by movement in another — installation timing is factored into how deep and how set a post needs to be.
A frozen or waterlogged base isn't workable for concreting, so winter installations sometimes need a delayed pour or a temporary prop until ground conditions allow the footing to cure properly.
Panel versus closeboard repair economics
A panel fence is repaired panel by panel, so a single damaged section is a straightforward swap, whereas a closeboard fence is repaired board by board, which suits a partial repair better but takes longer per linear metre.
Where storm damage has hit a wide section, a panel system is often quicker to put right; where only a handful of boards are affected, closeboard repair wastes far less sound material.
Vertical picket infill on top of a mesh security panel
Adding a row of vertical steel pickets above a mesh panel gives extra height without the wind loading of a full-height solid mesh extension, and the picket spacing is kept tight enough that it doesn't create a new set of usable footholds.
This detail is common where a boundary needs to reach a taller overall height for a later phase of a site's security review without replacing the mesh panels already installed at the lower level.
Corrosion inspection on buried metal fixings
Metal post anchors, brackets and shoes set at or below ground level corrode out of sight, meaning surface appearance above ground can look sound even where the buried portion has significantly deteriorated.
Rust staining bleeding up the timber post from ground level, or visible movement at the base despite an apparently solid concrete surround, are common indirect signs of corrosion happening below the visible surface.
Because the failure mode is progressive and hidden, periodic inspection of exposed fixings as a proxy, combined with checking for movement, is generally the practical approach rather than routinely excavating buried anchors.
Transition detail from decking down to lawn or planting
The edge where a deck meets an adjoining lawn or border needs a defined transition — a fascia board with a small step down, or a gravel or edging strip — rather than boards simply stopping at soil level, which otherwise leads to soil and organic matter migrating up against the deck edge.
That buildup against an unprotected deck edge holds moisture against the timber in exactly the way a raised bed built too close to a fence does, and is a common cause of localised rot along an otherwise sound deck perimeter.
A simple edging detail agreed at the design stage costs little compared with the deck itself but noticeably protects the vulnerable soil-contact edge.
Retail yards and car parks
Fencing around a retail unit's rear yard or customer car park usually has to satisfy insurer requirements for secured perimeters as well as simple boundary marking, particularly where stock or delivery cages are stored outside.
Vehicle impact is a real consideration in a car park boundary, and posts near a marked bay or turning circle are often specified heavier or protected by a bollard rather than relying on the fence itself to survive a low-speed shunt.
Work here is usually scheduled around trading hours and delivery windows, since blocking a rear yard during a delivery slot can hold up a retailer's whole day.
Boundary questions in conveyancing enquiries
When a property is sold, standard conveyancing enquiries (the TA6 form) ask the seller to confirm boundary ownership and disclose any known disputes, including informal agreements about fence lines that were never registered.
An unrecorded verbal agreement about who maintains which boundary can cause problems at sale stage if it isn't consistent with the T-marks or general boundary on the title plan, since the buyer's solicitor will flag the discrepancy.
Keeping a simple written note or email trail of any boundary agreement reached with a neighbour, even an informal one, makes a later sale considerably smoother than relying on memory years afterwards.
