Rolling Loess, Grade That Has to Be Respected, and Salt on the Highways
Saunders County is some of the most sharply rolling loess country in eastern Nebraska, and that topography is the local variable. In flat towns, a slab's drainage design is mostly about a gentle fall away from the house. In Wahoo, plenty of lots have real grade across them, and a driveway or patio placed on that grade is either working with the water crossing the site or fighting it. A slab that intercepts sheet flow from uphill and holds it against a foundation is worse than no slab. We spend more of the estimate visit on grade here than in most towns, and it is time well spent.
The soil itself is deep wind-blown loess over glacial till, and loess has the property that governs a lot of flatwork behavior in this part of the state: it is strong and stable while it stays dry, and thorough saturation can break down the weak natural bonding between its silt particles. That is why a downspout discharging at a slab edge, or an irrigation head aimed wrong, will produce settlement in a few seasons that has nothing to do with the concrete. When we are called out to a settled slab in Wahoo, drainage is the first thing we look at, and quite often fixing the drainage plus lifting the slab is the whole job — at a fraction of what replacement costs.
Highway 77 and Highway 92 both run through, and they get treated heavily through the winter. Chloride does not dissolve concrete directly, but it dramatically increases the number of freeze-thaw cycles a surface goes through and drives water deeper into it, and on young concrete that is genuinely destructive. Every mix we pour is air-entrained, which is the primary defense, and we ask every customer to keep deicer off new concrete for the entire first winter and use sand instead. In later years a penetrating siloxane sealer, reapplied every three to five years, is worth the modest cost on a driveway that sees a lot of salt.
Older Wahoo flatwork carries the same age problem as the other nineteenth-century towns around here: pre-air-entrainment concrete, unreinforced, that has been quietly losing its surface for eighty or more winters. Where that is what you have, replacement is the honest answer and an overlay is not, because a bonded topping needs sound concrete to bond to. We will tell you which of the two you are looking at rather than selling the cheaper one and letting it fail.
What we pour in Wahoo
- Driveways, replacements, and widening strips
- Patios, walkways, and outdoor living slabs
- Front steps, stoops, and porch slabs on proper footings
- Garage, shop, and outbuilding floors
- RV, boat, shed, and equipment pads
- Repair, resurfacing, slab lifting, and removal
