Freeholder consent for a leasehold garden
Leasehold houses and flats with a garden are usually still subject to the terms of the lease, which can require the freeholder's written consent before altering boundary structures.
This applies even where the leaseholder has full day-to-day use of the garden and has paid for previous fencing work themselves.
Checking the lease, or asking the managing agent, before committing to boundary work avoids a costly rebuild if consent turns out to be required and wasn't obtained first.
Diagnosing rot at the ground line versus mid-post
Ground-line rot sits just below and just above soil level, where moisture cycles wet and dry fastest and fungal decay does most of its damage; a probe test at that band catches most failures before they're visible above ground.
Rot higher up the post, mid-height under a rail bracket or where a panel clip traps water, is a different failure mode caused by standing moisture rather than soil contact, and needs the fixing checked as well as the timber.
Decking joist spacing and spans
Joist spacing under a deck is set by the board being used and the load expected, not fixed universally — timber boards typically need joists at closer centres than the equivalent composite board, because composite is generally less stiff across a span.
Manufacturers publish maximum joist spacing for their composite boards, and it's shorter still where boards run diagonally rather than square to the joists, since a diagonal run effectively increases the unsupported span between fixings.
Undersized joist spacing shows up as bounce or long-term sag between joists well before it becomes a safety issue, so it's worth checking spacing against the actual board spec rather than a generic rule of thumb.
Straightening a leaning run
A run that's leaning uniformly along several bays usually points to a common cause — waterlogged ground, wind loading from one direction, or an original footing depth that was too shallow — rather than a fault with any single post.
Straightening involves resetting posts along the affected bays rather than pulling the fence back into line at the top, since forcing the panels straight without addressing the post bases just reintroduces the lean.
Locating buried services before digging
Before any post hole goes in near a driveway, front boundary or previously-disturbed ground, a cable and pipe locator (CAT and Genny) sweep is standard practice, since gas, water, electricity and telecoms runs aren't always where a plan suggests.
Rear gardens are lower risk but not risk-free — older properties sometimes have redundant supply runs or septic/drainage pipework crossing the plot from a pre-mains era.
Where a locator flags a hit, hand-digging around the service rather than augering through is the only safe approach, even if it adds time to the job.
Breaking out old concrete footings
An old post base often left in the ground after a previous fence comes out will usually be a lump of concrete far bigger than the post it once held, and it rarely sits exactly where a new post needs to go.
Breaking it out with a hand tool or breaker takes real time compared with digging clean ground, and on a long run of old fencing there can be one buried lump per post rather than just an occasional obstruction.
Where a footing can't be fully removed without excessive disruption, offsetting the new post's position by a short distance is usually more practical than fighting the old base to keep exact spacing.
Flying freeholds and unusual boundary shapes
A flying freehold occurs where part of one property, such as a room, overhangs part of another below it, and can produce boundary arrangements in the garden that don't follow an obviously straight or logical line.
Properties with this kind of unusual legal history sometimes have correspondingly unusual title plan boundaries in the garden area, which are worth checking carefully rather than assumed from the visible layout.
Where a garden boundary looks like it doesn't match the physical shape of the buildings above, that's a sign worth investigating with the title documents before fencing work begins.
Concrete spurs as a lifetime-extension repair
Where a timber post has rotted at ground level but the panels and the rest of the run remain sound, bolting a concrete spur alongside the rotten section rather than replacing the whole post is a common and effective partial repair.
The spur takes over the structural role at ground level while the timber above the rot line, which is usually still sound, continues to carry the panel fixings.
This repair only works while enough sound timber remains above the rotten section to bolt through; once rot has progressed too far up the post, spurring no longer gives a reliable fix and full post replacement is the honest answer.
Good practice notifying a neighbour before work starts
There's no general legal requirement to notify a neighbour before replacing a fence that sits entirely on your own land, but doing so avoids most of the friction that boundary work can otherwise cause.
A short conversation or note covering timing, likely noise, and any need for brief access to their side goes a long way toward a smooth job.
Where the new fence will differ noticeably in height, style or colour from what's there now, flagging that in advance tends to head off objections that only surface once the work is finished.
Boundary questions raised during a property sale
Conveyancing on a property sale routinely asks the seller to confirm boundary ownership and flag any known disputes, which can bring long-dormant boundary questions to the surface.
A fence built or replaced without proper regard to the true boundary line can complicate or delay a sale if it comes up during these enquiries.
Keeping any boundary agreements, planning permissions or correspondence about a garden fence on file makes answering these standard conveyancing questions considerably easier when the time comes.
Post caps and end-grain protection
A timber post's end grain sits at the top, cut across the fibres, and that exposed grain draws in water far faster than the treated face of the post, which is why an unprotected post top is often the first place rot takes hold.
A weathered or pyramid-cut post cap sheds water off the end grain instead of letting it pool, and a cap that oversails the post slightly also keeps water from tracking down the sides at the joint.
It's a small, low-cost detail that's frequently skipped on budget jobs, and its absence is a reliable way to predict which posts in an older fence will need replacing first.
Boundary rules in National Parks and AONBs
Properties within a National Park or an Area of Outstanding Natural Beauty can have reduced permitted development rights for boundary structures, reflecting the additional planning protection these areas carry.
Material and colour choices are often more tightly guided in these areas too, even where the height itself would otherwise be permitted.
The relevant National Park authority or council planning department is the right first point of contact for confirming what applies before ordering materials.
Copper-based timber preservatives
Modern timber preservatives commonly use copper compounds as the primary biocide, since copper is effective against fungal decay and is less toxicologically hazardous than the older chromated copper arsenate formulations largely phased out for domestic use.
Copper-treated timber can accelerate corrosion in fixings made from certain metals, particularly plain steel and some aluminium alloys, in a similar way to oak's tannic acid reaction, which is why treated timber often specifies compatible fixing types.
Hot-dip galvanised and stainless steel fixings both perform acceptably with copper-treated timber, whereas untreated mild steel or some aluminium fixings can corrode noticeably faster in direct, damp contact with it.
Victorian terraces with rear alley access
Many Victorian and Edwardian terraces back onto a shared rear alley or 'twitten' rather than opening onto a private access road, and boundary fencing along that line is often a mix of ownership — some panels the householder's, some historically shared with the alley itself.
Alley gates onto these routes need to open inward or be set back, since a gate swinging out over a shared right of way can obstruct neighbours and bin collection.
Where the alley is council-adopted, replacing a boundary fence that fronts it can also need a look at any local byelaws on gate height and lockable access before ordering materials.
