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Slotted Concrete Fence Posts | Durable H-Posts for Timber & Composite Fencing

Our slotted concrete fence posts are strong, long-lasting, and maintenance-free – perfect for supporting timber fence panels with a secure and clean finish. Also known as H-posts, these posts feature pre-formed slots to easily slide in fence panels or gravel boards, making installation quick and hassle-free.

✅ Reinforced with steel for added strength
✅ Slotted design suits most standard fence panels
✅ Weatherproof and rot-proof – ideal for UK conditions
✅ Available in multiple lengths (6ft, 8ft, 9ft, etc.)

Trusted by landscapers, contractors, and DIYers for garden fencing, boundary fences, and security installations. Pair with concrete gravel boards and treated timber panels for a full fencing solution. Nationwide delivery available.

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8ft Intermediate concrete post 2440mm Fenn-lite 35kg each slot size 55mm-50mm

£19.20 - £19.20
£19.20
£19.20 - £19.20
£19.20
In stock

£19.20 - £19.20
£19.20
£19.20 - £19.20
£19.20

8ft end concrete post 2440mm x 105 x 80 -- 40kg each slot size 55mm -50mm

£26.40 - £26.40
£26.40
£26.40 - £26.40
£26.40
In stock

£26.40 - £26.40
£26.40
£26.40 - £26.40
£26.40

8ft Concrete corner post 2440mm x 130 x123 -- 59kg each slot size 55mm -50mm

£37.20 - £37.20
£37.20
£37.20 - £37.20
£37.20
In stock

£37.20 - £37.20
£37.20
£37.20 - £37.20
£37.20

6ft Concrete Intermediate post 1830mm /1.83m Fenn-lite 27kg each

£18.00 - £18.00
£18.00
£18.00 - £18.00
£18.00
In stock

£18.00 - £18.00
£18.00
£18.00 - £18.00
£18.00

6ft concrete end post 1830mm x 105 x 80 -- 31kg each slot size 55mm -50mm

£21.60 - £21.60
£21.60
£21.60 - £21.60
£21.60
In stock

£21.60 - £21.60
£21.60
£21.60 - £21.60
£21.60

6ft Concrete corner post 1830mm x 130 x123 -- 42.3kg each slot size 55mm -50mm

£31.08 - £31.08
£31.08
£31.08 - £31.08
£31.08
In stock

£31.08 - £31.08
£31.08
£31.08 - £31.08
£31.08

6 inch plain concrete gravel board 1830mm x 150mm x 45mm

£13.20 - £13.20
£13.20
£13.20 - £13.20
£13.20
In stock

 LW for slotted concrete posts 1830mm x 150mm x 45mm 27.7kg each

£13.20 - £13.20
£13.20
£13.20 - £13.20
£13.20

12 inch Rockface concrete gravel board 1830mm x 305mm x 45mm

£17.88 - £17.88
£17.88
£17.88 - £17.88
£17.88
In stock

 WC for slotted concrete posts 1830mm x 305mm x 45mm 59.1kg each

£17.88 - £17.88
£17.88
£17.88 - £17.88
£17.88

10ft Concrete Intermediate post 3050mm 73kg each slot size 55mm - 50mm

£36.00 - £36.00
£36.00
£36.00 - £36.00
£36.00
In stock

£36.00 - £36.00
£36.00
£36.00 - £36.00
£36.00

10ft concrete end post 3050mm x 105 x 80 - 77kg each slot size 55mm-50mm

£40.80 - £40.80
£40.80
£40.80 - £40.80
£40.80
In stock

£40.80 - £40.80
£40.80
£40.80 - £40.80
£40.80

Alter Supplies & Contracting

4.9

93 reviews on

Write a Review
Caroline Clulow
September, 2025
This may sound crazy but, honestly, I've never had such good service. Young men, mostly, who were knowledgeable and so helpful. Don't google for wood, most places are very expensive. Pieces that were £15 on Google were £4 here. 1.8 metre slats at £1.20. Great company.
George Davies
August, 2025
Friendly polite staff nothing to much trouble fast home delivery service would recommend to everyone
Adam Plenderleith (RevRev)
August, 2025
Another delivery from Alter Supplies today. Amazing service even for a relatively small order. Timber and slabs delivered promptly by a very cheery young man! An easy 5* given!
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