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Buff Bricks. Yellow Bricks. Grey Bricks. Brown Bricks. Black Bricks. For any type of fence, the depth of the hole you must dig depends on how tall the post will be above ground.
You should always bury one-third of your fence post underground. For a 6-foot fence, for example, you need a 9-foot post, so that 3 feet can be underground. This means that unless you are building a 2-foot fence, which is unlikely in any garden, a 1-foot hole will not be deep enough to support your post.
For main and gateposts, you should dig the holes an additional 6 inches deep. When digging your post holes, make the hole even larger than it needs to be to fit the post, so there will be room for cement. Dig 6 inches deeper for all posts, so that you can fill the bottom 6 inches with gravel to facilitate water drainage away from the bottom and reduce rot.
Dig the hole 10 to 12 inches wide. Although you can use a shovel to accomplish this, posthole diggers and power augers make the job easier.
Next, pick them up and then use a little force to force the blades down into the loose soil and then pull the handles apart to grab the soil and then pull them upwards out of the hole.
Repeat step 3 and this step and work your way down to the required depth, occasionally stopping to measure your depth with the tape measure. Remember : You will have to line the base of the hole with around 6 inches of aggregate to allow drainage so remember to account for this.
During digging you are likely to encounter a whole host of objects including rocks, tree roots, old bricks and blocks etc. If you come across any tree roots, if you have a reciprocating saw, use this to cut them out and if not, a small narrow saw such as a compass saw.
Once you have reached your desired post hole depth, tamp down the entire base of the hole with your tamping bar to pack the soil down until its solid. This will provide a nice flat and level surface for your posts. Depending on how loose the soil is, it may compact down a fair amount so make sure to measure the depth again. If your hole is now too deep, add some soil back in and tamp it down until your back to the required depth. Before getting your fence posts fixed in place, remember to put your line level back so that you have a line to level your posts against.
The above information covers how to dig out a fence post hole, for more information on how to fix fence posts in place, see our project here. Once your posts have been set, see our project here for information on how to fix fence fence panels to fence posts to get your whole fencing project completed. All project content written and produced by Mike Edwards , founder of DIY Doctor and industry expert in building technology.
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Skip to primary navigation Skip to main content Skip to primary sidebar Skip to footer Main navigation. Search this website. Blog DIY Competitions. Twitter Facebook Pin It Buffer. Project Page Menu. As the post is 4 inches wide, 3 multiplied by 4 is 12, so the hole needs to be 12 inches square. Back to the Top.
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