Hollow vinyl posts need concrete in two places — around the post in the hole, and often inside the post itself for gate and corner posts. This guide covers both calculations, explains why overfilling the inside can prevent post caps from fitting, and covers the real risk of cracking vinyl through thermal expansion when a post is filled completely solid.
Metal fence posts range from a light T-post to a heavy ornamental steel pier, each needing a different amount of concrete around the same circle formula. This guide covers sizing for every common metal post type, explains the actual chemistry behind wet concrete and galvanized coating (it's protective, not damaging), and covers when a sonotube is worth using for a clean, exposed finish.
Wood fence posts range from a standard 4x4 (about 3 bags of concrete) up to structural 8x8 posts (13+ bags), with 4x6, 6x6, and round posts in between. This guide covers every common size in one chart, explains how wet pressure-treated lumber measures larger than dried lumber at install time, and walks through worked examples for rail, structural, and round posts.
Most cracks in fence post concrete are thin, harmless shrinkage cracks — a normal part of curing. This guide gives a quick visual test to tell those apart from the smaller number that actually matter, covers freeze-thaw spalling and settlement cracks, and explains why cracks radiating from the post itself often mean something is pushing outward from inside.
A leaning post and a loose post often have different causes — and a simple push test tells you which one you're dealing with. This guide covers the full diagnostic process, explains why wood shrinkage (not a bad installation) is often behind a wobbly new post, and matches every cause to its right fix, from a quick gap-filler to a full footing reset.
A fence panel's wind resistance matters more for timing than its actual weight, which is why a solid privacy panel needs longer than an equally heavy but open-style panel. This guide breaks down wait times by panel type and temperature, explains why gates need a separate, longer timeline than panels, and covers how to sequence a multi-post build safely.
Concrete moves through four distinct curing stages, and temperature changes the timeline dramatically — a post curing at 70°F reaches full strength around day 28, while one poured below 40°F can take 45+ days. This guide breaks down each stage, explains why fast-setting and standard mix end up at the same final strength, and gives temperature-adjusted timelines for cold, moderate, and hot conditions.
Gravel under a fence post answers two different questions: should it go underneath every post (yes, 4-6 inches, even with concrete), and can it replace concrete entirely (only in the right soil). This guide separates both questions clearly, covers gravel type and amount, and explains exactly when gravel-only setting is a safe choice versus when concrete is the better call.
Dry set and wet set concrete both hold fence posts securely for decades when done right — the real differences are speed, soil compatibility, and adjustment time. This guide compares both methods directly, covers the genuine industry debate over final strength, and explains why soil type (and even post material, in the case of Corten steel) should drive the choice more than personal preference.
A post already occupies part of its hole, and skipping that subtraction overestimates concrete needs anywhere from 5% to 27% — worst at exactly the "3x post width" hole size most people actually dig. This guide quantifies the error by hole size, works through real bag-count examples, and covers edge cases like round and tapered posts.