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Repair fence post

How to repair a fence post safely

  • Wooden fence posts commonly rot at ground level. Most of the time it can be repaired but on occasions the rot has travelled up the centre of the post which means the post needs replacing. 
  • A repair fence post brace is a temporary post repair used to stabilise the fence during the repair or until the repair can be undertaken safely.
  • A temporary repair of a fence post is by using a metal repair stake or wooden brace.
  • A wood fence post repair is the most common fix needed, easily fixed using a replacement post, concrete fence post repair spur, met spike or a metal repair stake.
  • Ultimate wooden post repairs have the rot treated. The remaining post above ground is bolted to a concrete spur at the base of the wooden post and extends the length of the post, replacing the waste rotten section for the greatest longevity.
  • Ultimate wood fence post repair spur is concrete , cemented 600mm in the ground, securely coach bolted to the wooden post, levelled up & braced. Remove rot & treat the base of the remaining wooden post to reduce decay spreading.
  • Ronseal wet rot wood hardener is a good quality resin wood rot treatment and will strengthen, protect the wood assisting a much greater longevity of the wooden post.
  • What tools do I need to repair a fence post? The tools needed are a large concrete drill, extension lead, pry bar, drill, hammer, post scoops, post spade, buckets for water and waste, ear & eye protectors and a good pair of work gloves.
  • The Ultimate fence post repair Method

  • Stabilise the fence. Before repairing a rotten fence post, the fence needs to be stabilised. Bracing the fence with timber supports will assist keeping the fence and post in a stationary, upright position whilst undertaking the fence post repair.
  • Offset fences need to have the paling boards removed behind the post so the tools needed are a small pry bar, hammer and extension pipe for the pry bar and possibly a drill depending which fixings were used during construction.
  • Dig a hole in front of the post 600 millimetres deep and 200 millimetres wide.
  • Remove rotten post section in the ground and retreat the remaining post with wood preservative and rot treatment.
  • Place a concrete fence post repair spur in the hole and fix secure to the repaired wooden post with coach bolts. Coach screws can be used but is an inferior used for quickness.
  • Half fill the hole with post mix, level up the post, add water, check level, and add the rest of the post mix and water mixed together.
  • Fence post replacement s will need to have the panels, rails & gravel board detached from the post. Often wooden rails, panels and gravel boards are damaged. So, it is the best longevity advice to treat fence post repair wood rot with a good quality rot treatment so there is not a need to dismantle the fence and cause further damage to the wooden components.
Post hole depth

Post repair hole depth

  • A post repair hole depth is the same as a new post hole
  • A Post hole depth of 600mm is recommended for a 1.8 metre high fence means one third of the fence height is the hole depth as long as it is in virgin ground with a good binding structure.
  • Ground structure needs to be untouched virgin ground, meaning never been dug into.
  • Post hole width needs to be at least 75mm wider than the post to allow for cement infill and best dug out with an Earth Auger or post scoops.
  • Post hole size depends on the surrounding structural integrity of the ground. If the structure of the ground has been disturbed through ground works or if the soil is light and sandy there would be a need to make the hole bigger or deeper. 
  • Retaining posts properties rule is same depth to height. This only applies large volume soil retaining needs 
  • If post retaining properties exceed just fencing pressure there may be a need to use stronger posts, so seek advice from a structural engineer.
  • To create greater resistance the hole can be dug out with squared sides, deeper or wider hole. 
Wood post repair

Post repair hole depth

  • Fence post repair spur hole depth needs to be 1 third of the fence height  
  • 1.8 metre high fence p ost repair hole depth  needs to be 600mm. This height fence needs a heavy weight repair spur.
  • 1.2 metre high fence  post repair hole depth  needs to be 400mm. This height needs a light weight repair spur
  • Post repair hole depth structure is based on solid compact firm virgin ground so the post will not move under pressure. If the soil structure is weak or recently loosened through digging it is adviseable to dig the hole deeper until the hole has the specified depthwith surrounding virgin soil.
  • Post repair holes loose soil needs removing to ensure a soild contact for the post & post mix with no movment is given.
How to treat wood rot

Ultimate wood fence post repair method.

  • How to treat wood rot;  remove loose rotten wood before repairing a wooden fence post.  
  • Drill a series of deep closely spaced holes in all rotten areas of the affected rotten repair fence post. Ensure the wood below the  fixing points for the spur are nearly drilled to the opposing side of the post so the rot treatments can penetrate to all possible rotten wood.
  • Inject rot treatment  into all wooden post repair holes to form a protective barrier, considerably reducing the risk of rot spreading which will affect the timber structure around the fixing points of the wood.
  • Treat all wood rot  with Ronseal Rot Hardener. https://www.ronseal.com/products/high-performance-wet-rot-wood-hardener/
  • Reduce water saturation, paint bitumen or another good wood water sealant product up to 100mm above ground.
  • Rot free repaired fence posts can now be fitted to the spur to complete the repair for a long lasting professional wooden fence post repair
Post repair

Which is the cheapest fence post repair.

  • Ultimate wood fence post repair fixing to a repair spur is a Coach bolts and is the professionals choice.
  • Quick fence post repair fixings are coach screws  but are a poor substitute opposed to coach bolts for post repair strength of hold.
  • B est bolt for a wood fence post repair  is a hot dipped galvanised coach bolt or stainless steel.
  • Fixing a post repair spur to a wooden post repair should be done using M10 Coach Bolts. This method clamps the two posts together rather a screw will just pull the two surfaces together.
  • Coach bolts clamp the two posts securely together as the ultimate fastening as a post repair.
Wood post repair

How to level a fence post? (plumb levelling)

  • Vertical Post levelling is called plumb levelling .
  • Attach a string line to the top of the  neighbouring posts at equal points .
  • Fence post levelling is achieved by front & side aligning of the post. Keep checking the bubble is in the centre of the vial.
  • Side alignment of the post repair levelling is for allowing for a panel or rail to fit into. Keep checking the vial bubble
  • Front and back alignment of post  levelling& fence post repair for a straight line of the whole fence with the fixed string line between the neighbouring posts fixing points.
  • Align the fence post repair by placing the level at ground level of the post repair and in line with the string line. The plumb line bubble is at each end of the sprit level. The bubble needs to be in the middle of the vial tube, between the 2 centred lined markers. Adjust the post until the post is level with the string line and the bubble is in the centre of the vial.
  • Level up the fence post repair to the string line at equal heights same as the string line is set to at each end of the string line. When the post repair is aligned add a half bag of dry post mix. The dry mix slides under the post repair when lifting to the desired height. Keep checking the post alignment.
  • Water needs to be added into the hole, ensuring the water penetrates to all areas of the post mix in the hole.
  • Add the rest of the post mix ready mixed with the water and keep checking the post repair is level and still aligned.
  • To finish, check the post alignment.
Fence post repair

Which fence post repair spurs to buy?

    • Fence post repair spurs are concrete or metal support used to reinforce existing rotten or broken fence posts.
    • Best f ence post repair spur is concrete &  will have the greatest longevity of 40+ years.
    • Metal fence post repair spurs is a shorter term fix of 1-15 years depending on manufacturing quality.
    • Best metal fence post repair support is hot dipped galvanised metal which is a true exterior grade which has a 20 micron coating opposed to sheet metal being a 4 micron coating. And will last around 30 years.
    • Expertly repaired wooden posts last 10-25 years.
    • Poorly repaired fence posts last 5-10 years depending how rotten the post is when fitting the fence post repair spur & fixings used.
    • Ultimately concrete fence post repair spurs concreted into the ground with a new wooden post bolted to it will last around 30-40 years with the advantage of then being an unbolt and a new one bolted on with very little expensive labour costs.
concrete post repair

Concrete post repair spur makes fence posts last longer?

  • C oncrete post repair spur is the ultimate post repair, lasting 60-80 years approximately & outlast 5-10+ wooden posts life cycles in the ground.
  • Fitting a concrete post repair spur by digging a hole next to the fence post & cementing the spur into the ground. A wooden post is then bolted to the spur with coach bolts
  • Concrete Repair spurs in your garden should be within the owner’s boundary line on the owner’s side of the fence.  
  • Lifespan of timber posts is up to 35 years bolted to a concrete spur above ground as the timber is not in saturate ground conditions.
  • Hole depth of 1.2 metre concrete post repair spur are 100mm width, 600mm in the ground & 600mm above ground & easily hidden with a bush in front. These posts are suitable fences up to 2 metres in height.
  • Hole depth of 1metre concrete repair spur are 75mm width, 500mm in the ground, 500mm above ground and suitable for fences up to 1.5 metres in height
  • A money saver concrete post repair spur is a great way of having the aesthetical look of wood, the durability of concrete & replacing a post in future is a bolt on off repair. 
  • Painting concrete post repair spur with masonry paint helps reduce concrete visibility.
Post repair

How much does a post repair cost?

Wooden inline fence post repair costs:

  • 100mm x 100mm repair spur = £110
  • 100mm x 75mm repair spur = £105
  • 75mm spur = £90
  • Please add £5 if there is only one

Wooden offset post repair costs are:

  • 100mm x 100mm repair spur = £115
  • 100mm x 75mm repair spur = £110
  • 75mm spur = £95
  • Please add £5 if there is only one

Cost includes labour, fitting, material, hot dipped galvanised coach bolts and waste costs.

Discounts available to property maintenance companies.

Concrete repair spurs

75mm x 75mm x 1000mm = 3” x 3” x 39.37” approximately

  • Low load bearing post
  • Suited for fences under 1500 mm = 5’
  • Suitable for non-load bearing trellis panels up to 2 metres in height.

100mm x 75mm x 1200mm = 4” x 3” x 47.24” approximately

  • Medium load bearing post
  • Suited for 75mm flat edged wooden posts.
  • Suitable for all fences styles up to 2 metres = 78.74”

100mm x 100mm x 1200mm = 4” x 4” x 47.24” approximately

  • Medium load bearing post
  • Suited for 100mm flat edged wooden posts
  • Suitable for all fences styles up to 2 metres = 78.74”

100mm x 100mm x 1350mm = 4” x 4” x 53.15” approximately

  • Medium load bearing post
  • Suited for 100mm flat edged wooden posts
  • Suitable for all fences styles up to 2 metres = 78.74”
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