Practical points for boundary work in London Fields
Slotted versus morticed concrete posts
Slotted concrete posts have a continuous groove cast into two or four faces so panels slide down into the slot from above, which makes them fast to erect but means every panel in a run has to come out to replace one in the middle.
Morticed concrete posts have discrete rectangular pockets for arris rail ends instead, matching closeboard or panel construction where individual boards or panels can be replaced without disturbing the rest of the run.
The choice is largely dictated by the fencing system being used — panel fencing wants slotted posts, boarded fencing wants morticed — rather than being a free preference at quote stage.
Salt-laden air and coastal-adjacent exposure
Gardens within a few miles of open coast, or on a plot regularly exposed to salt spray carried on strong onshore winds, see accelerated corrosion of standard fixings and hinges compared with an inland site.
Stainless steel or heavily galvanised fixings are worth the extra cost in these conditions, since standard zinc-plated screws and hinges can show surface rust within a single season.
Timber itself isn't usually damaged by salt exposure directly, but a finish applied over salt residue left on the surface after a storm won't bond as well as one applied to a clean, rinsed surface.
Douglas fir for structural fencing timber
Douglas fir is a stronger, stiffer softwood than typical whitewood or redwood, with a pronounced grain pattern and moderate natural durability in its heartwood, making it a common choice for structural posts and gate framing rather than boarding.
Its resin content is generally lower than pine, which reduces the risk of resin bleed showing through a painted or stained finish.
Because of its strength-to-weight ratio it's often specified for longer unsupported spans, such as wide gate frames, where a lighter section still needs to resist twisting under its own weight.
Recording an informal boundary agreement properly
Where neighbours agree a boundary line that differs slightly from, or clarifies, what the deeds show, that agreement carries far more weight if it's put in writing and signed by both parties rather than left as a verbal understanding.
A formal boundary agreement can, in some cases, be registered with HM Land Registry against both titles, which protects the arrangement for future owners of either property.
Even a simple written note with an agreed sketch, dated and signed by both neighbours, is worth far more later than relying on memory of a conversation years afterwards.
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.
Hand-digging near suspected buried services
Once a cable avoidance tool or utility plan indicates a service is likely nearby, digging switches from auger or mechanical methods to hand tools only, working down in shallow spits rather than one deep thrust.
A spade can still shear a shallow, poorly-buried cable, so the safer tool close to a marked service is a fork or trowel used to expose it by feel and sight before any spade work resumes.
If a cable or pipe is exposed, it's left supported and undamaged in the open trench rather than backfilled over, and the post position is adjusted if the service sits exactly where the hole needs to go.
