Concrete Products

APR 2019

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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Page 52 of 63 April 2019 • 51 INNOVATIONS REPORT KINGSPAN KOOLTHERM Stubbe's Precast Commercial. As design proceeded for a new head- quarters office, including sandwich panel specs, the structural and architectural concrete producer targeted a 4-in. insulation board with elevated R-value. Kooltherm K20 exhibited the thermal performance Stubbe's management envisioned for the envelope of a three-story, total precast structure housing up to 120 employees. Acting as its own engineer of record and precast engineer, the producer incorporated exterior insulated panels, precast interior walls and beams, hollow-core plank, plus double-tee members. The headquarters facility has two wings, plus a center atrium with companion, glass-encased boardroom. "We have multiple precast finishes on the interior with an integral white concrete exterior accented with various stained portions, as well as thin brick," observes Stubbe's Project Manager Albert Meyer. "There are several stained concrete feature walls on the interior, a waterfall in the reception area, concrete countertops throughout the building and a polished-concrete boardroom table." The exterior walls required robust insulation, he adds, noting, "Kooltherm K20 really worked well for us, primarily because it pro- vides an R-value of R34 in a reduced thickness. Most insulation boards provide an R-value of R5 per inch. Kooltherm K20 provides an addi- tional R-value of 8.5 per inch. Better insulation lowers heating costs and overhead for the life of the building." The board is unique in the market because of its thermal per- formance, Macro explains, and equips precasters to pursue lean alternatives to thick wall sections, which increase costs and compli- cate structural connections. "Kooltherm K20 has a fiber-free core," he says. "Its fire performance is a huge feature and was really important to Stubbe's. Kooltherm K20 also has a closed-cell structure, so it keeps out moisture and water, is resistant to fungi and is very stable. All of this is important to precasters because it doesn't reduce the R-value over time. Kooltherm K20 has a low pollution potential and hits all the environmental hot points, which architects really like." — King- span Insulation LLC, Atlanta, 800/241-4402; www.kingspaninsulation. us; Kingspan underscores Kooltherm K20's potential to attain higher thermal performance in thinner profiles than conventional insulation boards: R-value up to R17 in 2-in. thickness. The product has a glass tissue based facing, adhesively bonded to a core of rigid thermoset, fiber-free phenolic insulant. Nearly 23,000 square feet of K20 was used in sandwich panel and other conditions for the Stubbe's Precast Commercial headquarters. The producer's production facility and new headquarters are located in Harley, Ontario.

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