The 1.8m (6ft) x 100 x 100mm wooden fence post combines a short overall length with a substantial square section. It is intended for lower fencing where a broad fixing face and heavier timber support are useful, but where buying a 2.4m or 3.0m post would add unnecessary length.
The 100 x 100mm square section gives a broader fixing face and a more substantial support than a 75mm post. It suits fence runs where a heavier timber post is preferred, including substantial panel fencing and site-built timber boundaries. The larger section is useful when the post needs to provide more fixing area for rails or panels, but it also creates a visibly heavier post line. If the fence is relatively light, compare the 75mm alternatives rather than specifying the larger section by default.
Set the fence line out before digging so the post centres suit the actual panels or rail system rather than an assumed bay width. Keep each post plumb in both directions and check the top line as the run progresses. If the posts are being set in concrete or post mix, select a suitable material from the cement products range and follow its installation instructions rather than relying on one fixed amount for every hole.
The 1.8m overall length is best considered for lower boundaries, picket fencing, trellis supports and other layouts where a longer 2.4m or 3.0m post would leave unnecessary material below ground. The key check is not the nominal fence height on its own: allow for the portion of post that must remain below ground and make sure the length still leaves the required finished height above it. On an exposed boundary or where the fence carries a large solid surface, moving to a longer or larger-section post may be more appropriate. The shorter length is most useful when it genuinely matches the fence design rather than being cut down from a longer post.
The timber is pressure treated to improve resistance to fungal decay, rot and insect attack. The brown treatment gives new timber a warmer appearance that coordinates naturally with similarly treated fence panels and fencing timber. As with any natural timber product, grain, knots, colour and surface character vary from post to post and the appearance will continue to weather outdoors. The wooden fence posts range includes 75mm and 100mm sections in 1.8m, 2.4m and 3.0m lengths, so compare the complete combination rather than choosing on length or section alone.
