Spray Foam Insulation in Bondurant, IA

A town built mostly in the last fifteen years

Bondurant sits northeast of Des Moines off the U.S. 65 bypass, with the Chichaqua Valley Trail running through it toward the Skunk River bottoms. It was a small farm town until the 2000s. The Census Bureau's 2020-2024 American Community Survey shows a median year built of 2011 for its roughly 3,000 housing units, with about 75 percent built since 2000 and about 53 percent since 2010. Only about 2 percent of the housing predates 1960, in the few blocks of the original town.

A large share of Bondurant's houses were therefore permitted under Iowa's 2012-based energy code and, for those permitted after June 2014, were blower door tested at 4 ACH50 or better. That is a genuinely better starting point than most of the metro. It still leaves the rim joist, the bonus room over the garage and the basement walls as the places where a tested house loses heat.

Exposure and wind

Bondurant's subdivisions sit on former cropland with young trees and open sightlines to the northwest, the direction Central Iowa's winter wind comes from. Wind pressurizes one side of a house and depressurizes the other, which drives air through whatever openings exist regardless of how the house tested on a calm day. The details that resist wind are the same ones that resist stack effect: a foamed rim joist, sealed top plates and can lights, and a bonus room floor that is actually insulated and air sealed at the garage ceiling.

Basements, shops and what to expect

Bondurant basements are recent poured concrete and, in many houses, about to be finished. Closed-cell foam on the walls and rim before framing is the right first step and a quick one in a clean basement. On the acreages toward Mitchellville and the Skunk River, post-frame shops and sheds are common, and closed-cell foam on the steel roof and walls is how they stop condensing and become heatable.

Because the houses are new, an assessment in Bondurant is usually quick and the scope short: a handful of specific items, each with a stated foam type and thickness.