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Bolt-down bases and driven spikes save hours on patios, drives and yards. You avoid breaking out slabs or tarmac, keep dust and slurry off finished areas, skip curing time, and leave paving intact. For short runs by a terrace, bin stores, light screens and bike sheds, fence post supports are quick, clean and strong when used correctly.
They are not right for every job. Very tall solid panels or heavy field gates in exposed spots still need deeper foundations. Essex realities matter: older concrete drives vary in thickness; block paving often sits over MOT Type 1; and coastal winds can be severe. Used in the right places, supports give a fast, tidy install that lasts. Essex Concrete and Fencing can help you choose the right method for your site.
Use bolt-down shoes only on sound concrete, ideally 100–150 mm thick. Well-laid block paving on a solid sub-base can work too. Avoid cracked slabs, loose flags, or fixing very close to edges; stay 75–100 mm from edges and joints. In sheltered gardens, bolt-downs suit low screens and picket fencing. On exposed coastal plots, lower heights or switch to a different foundation.
For base stability in local soils, see fixing posts in clay Colchester ground rules. If in doubt between foundations, read our comparison: concrete slotted posts vs timber.
Driven spikes suit firm soils and verges where digging is hard or risky because of tree roots or shallow services. In Essex’s wet clays, seasonal shrink and swell can loosen spikes over time, so treat them as a quick or lower-duty option. They work for temporary stock wire, short picket runs, or garden edges away from patios and drives.
Do not drive spikes through paving or tarmac. Always locate buried services first. For typical layouts, see our guide to rabbit and stock wire setups.
This image was generated with AI and may not always represent the product or service exactly.
M10–M12 sleeve anchors are quick for sound concrete. Through-bolts are excellent in solid slabs. Use resin (chemical) anchors near edges, in cracked areas, or where you need the highest pull-out resistance. As a rule, keep anchors 8–10 × anchor diameter from free edges if you can. Choose hot-dip galvanised hardware as standard. Upgrade to stainless A2 inland for year-round wet conditions, and A4 for salty coastal air in Southend, Clacton and Frinton. Browse suitable anchors and bolts in ironmongery.
For posts, use UC4 pressure-treated timber and seal all cut ends. Leave a small drainage gap between the timber and the shoe base. For more on timber durability, read UC4 timber posts: what Essex homeowners should know.
On sound 100–150 mm concrete, bolt-down shoes suit open slatted, picket or trellis-topped fences up to about 1.2–1.5 m in sheltered gardens. Avoid solid 1.8 m closeboard panels unless a structural design proves the base and anchors. Corner and end posts take higher loads; upgrade fixings or foundations at these points. Keep post centres sensible—typically 1.8–2.4 m depending on panel type and exposure.
For gates, a light garden gate up to around 900 mm wide may work on bolt-downs if the slab is thick and strong. Field or driveway gates should use concrete-set or core-drilled posts. For sizing and safe hardware, see our gate hinges and latches buying guide.
Wear eye and hearing protection, and confirm services before drilling.
This image was generated with AI and may not always represent the product or service exactly.
Avoid post supports for very exposed coastal sites, 1.8–2.0 m solid panels, heavy driveway gates, or at weak slab edges. In these cases, dig and concrete the posts or use slotted concrete systems with gravelboards. This spreads loads and reduces fence movement over time.
On heave-prone ground, depth and drainage matter as much as the post. For low-maintenance long runs, consider concrete slotted posts and concrete gravelboards. They handle wind and wet ground reliably when installed correctly.
For most bolt-down runs, choose 100 × 100 mm UC4 posts. For light privacy screens, 75 × 75 mm may suffice if spacing and exposure are modest. Use cant rails and proper fixings to keep frames rigid and reduce racking at the base.
Reduce wind load with open slatted screens, picket, or trellis tops where privacy allows. Over hardstanding, fit a slim wooden or steel gravelboard on brackets above the surface so water can drain. Avoid trapping debris and moisture at the post base.
Bolt-downs cut labour hours per post—you skip digging, spoil removal, reinstating paving, and curing time. You also avoid skip hire and patching costs. Anchors and quality shoes add material cost, but installs are cleaner and faster, especially on small projects by a patio or drive.
For long, exposed runs, concrete-set posts can still win on value and performance. Compare local prices and labour for your site before you decide. Use our benchmarks: fencing prices in Essex.
Locate underground services with a CAT scanner or plans before you start. Keep safe distances from slab edges and joints, and repair cracks before fixing anything. On block paving, make sure the sub-base is solid and consider resin anchors with sleeves where there are voids.
Confirm planning limits, especially near highways, and agree boundary lines with neighbours on shared drives. Keep dated photos of the base condition before fixing—useful for warranties and avoiding disputes.
Yes, if the paving sits on a solid, well-compacted sub-base. Use longer resin anchors that pass through the blocks into the sub-base, and keep clear of edges and joints. In voided areas, use sieve sleeves with resin.
Keep at least 75–100 mm from slab edges and control joints. Closer than that raises the risk of cracking and reduces pull-out strength. Follow the anchor manufacturer’s edge-distance guidance if greater.
Stainless A2 or A4 fixings resist staining far better than mild steel and are a smart upgrade in wet or coastal Essex locations.
Use 100 × 100 mm UC4 posts for most screens in sheltered gardens. In breezier spots, reduce height, shorten post spacing, or move to a deeper foundation.
No. Even light gates create twisting loads; use concrete-set or core-drilled posts instead.
Most cure within 30–60 minutes in mild weather. Check the product datasheet and allow longer in cold conditions before loading the fixings.
