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Tommy Walsh's DIY Guide
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Tommy Walsh's DIY Guide (2001)(Empire).iso
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t1b.txt
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1998-10-06
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Summary
This topic details how to set concrete fence
posts in concrete and hardcore.
1 Removing bricks or concrete
2 Digging the hole
3 Inserting the posts
4 Checking the horizontal
5 Checking the vertical
6 Filling the hole with concrete
Tools
Concrete mixer, shovel, mixing board, breaker,
sledgehammer, bucket, spirit level.
Materials
Concrete, hardcore, posts.
Step 1 - Removing bricks or concrete
If you have to make a hole in a solid surface then
either take up the slab or bricks, or break the
concrete with a hammer. Remove the debris and
dig below. Alternatively hire a breaker.
Step 2 - Digging the hole
Dig each hole to the required depth; this should
be at least 760mm for tall posts. Try and keep
the hole as narrow as possible for the size of
the post.
Step 3 - Inserting the post
Insert a post so that one side is against the string
guideline and pack some hardcore round the base to
keep it upright. Make sure ridges for gravel board
and panels or holes for wire are facing the correct
way.
Step 4 - Checking the horizontal
Lay a length of timber across the top of two consecutive
posts and use a spirit level to check that the tops are
level.
Step 5 - Checking the vertical
Again use the spirit level to check the vertical
alignment, then pack in more hardcore and bricks.
Pack the hardcore down into the hole to make sure
the wind canÆt blow the post out of position.
If necessary use a temporary support-stay pegged
in at the bottom to keep it in place.
Step 6 - Filling the hole with concrete
The type of fence determines whether to erect it
before concreting in. Fill the top half with concrete
creating a small ridge at bottom of the post to
disperse water.