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Author Topic: Replacement Gate Post
Ken Hume
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Posts: 418
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Post Replacement Gate Post
on: November 3, 2015, 08:38
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When a 30 year old larch gate post broke and fell over it became necessary to replace same. In the first instance the remainder of the post was still lodged in the ground and this was examined and found to be well and truly rotten. The rotten post bottom was then broken down using a narrow bladed garden spade and the decayed bits removed by hand. Eventually it was necessary to lie on the ground and stretch an arm down to the bottom of the hole to extract the frass like remains of the post bottom. The sides of the post hole did not collapase and slough into the hole demonstrating that the original post had been backfilled with a weak concrete mix.

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A new 8ft long European Larch post was selected from the log pile that had a slightly smaller diameter than the original hole.

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This log was treated with creosote and then upended and dropped into the hole small end diameter (i.e. top of log) first.

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Though the installers of the original gate post must have felt pleased with the firmness of their gate post installation they had inadvertedly set in motion a perfect timber rotting environment for the post bottom since any rainwater water ingress around the post bottom could not escape by draining down or out.

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The new European Larch gate post bottom installed was brush treated with creosote over the bottom 4 ft (3ft in ground 1ft above ground) and then the 1" gap around the new post was backfilled with free flowing pea gravel / shingle. This method ensures that rain water can down drain down rapidly away from the ground interface zone where rot ocurs most rapidly. The gate post and hence gate are now held very firmly in place.

Ken Hume OWG

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