Aurora Footings and Piers

Count the times a footing goes to work at your house. Somebody leans on the deck rail. Four feet of heavy March snow parks itself on the covered patio roof. The hot tub fills and holds a load for years without a break. A gust front comes off the plains in July and tries to pick the whole pergola up like a kite. All of that lands on a column of concrete nobody in the family has ever seen or thought about.

That's the strange thing about bearing work. It's the most used and least noticed concrete on any property. Get it right and forty years pass without an incident. Get it shallow, undersized, or bearing on soil that was never going to hold, and the structure above starts sending you notes: a gap at a post base, a stair that pulled off its landing, a gate that only drags in April.

The things people add later, and whether the ground under them agrees

Down is the easy direction. Up is the one that gets people

Most people picture a footing resisting weight. On the Front Range the load that ruins small structures usually runs the other way. Soil that takes on water can push a shallow support upward, and unlike settlement, heave doesn't need decades. One soaked autumn followed by a hard freeze can lift a post enough to open a visible gap. Then spring comes, the ground gives the water back, and the post drops most of the way down again. That seasonal wobble is what people describe when they say a gate only sticks in one part of the year.

Wind is the second uplift problem. A covered patio or pergola is a wing. The roof plane catches a summer downdraft and tries to lift the posts out of their bases, and the connection at the bottom of the post is where that fight gets decided. Post bases rated for tension, anchored into the pier rather than screwed to the top of it, are not an upgrade. On this ground and in this wind they're the baseline.

We see both problems around town, in newer construction near Sterling Hills and Saddle Rock where a shade structure went up after closing, and on older properties where a deck was built when a two-foot hole passed for good enough.

Frost sets the digging calendar, water sets the risk

Spring through late fall is the workable stretch, and early fall is the best of it: dry soil, long enough days, and concrete that gains strength before the first hard night. Spring works fine once holes quit taking on meltwater. Any hole that fills gets pumped and re-inspected before concrete goes in it, because a footing placed into standing water is a footing you'll be buying twice.

Winter work happens. Frost here acts like a lid more than a wall, often a foot or two of hard ground sitting over dirt that drills normally. We thaw instead of chipping, warm the mix water, insulate the tops, and tarp anything open at night. Slower, pricier, and still better than watching a deck drop another inch until May.

One rule holds in every month: no concrete against frozen soil. That soil pulls back the moment it thaws and leaves new bearing sitting over a gap nobody can see.

How we keep a finished yard livable while we drill

• Utility locate placed and marked before anything opens, every time, on every property
• Hand digging anywhere sprinkler lines, gas service, or mature roots are in the way
• One equipment path chosen with you, planked or matted, instead of driving wherever is convenient
• Spoils onto tarps rather than lawn, and off the property the same day where we can
• Holes covered any night they stay open, for safety and to keep weather out
• Backfill compacted in lifts around each pier, then the surface raked back and left tidy