Letter to the Editor
Concrete Tilt-Up Construction VS Pre-Engineered
What a Difference
I have been keeping an eye out in different trade publications for the heating
and cooling costs between concrete tilt-up and pre-engineered building systems
(select low rise and warehouse market).
The following two buildings were built in New Glasgow, Nova Scotia, Canada in
2008 and are 500 feet apart.
One Building (Bldg A) is constructed of load bearing 7" Concrete Tilt-Up
measuring 260 x 100 x 22', 572,000 CF.
The Second Building is constructed of
preengineered structural steel 24 ga roof and walls. 50 x 100 x 18', 90,000 CF.
Each building maintains 17 degrees Celsius within the warehouse portion of their
Insulation Building A uses 5" type II Expanded polystyrene Styrofoam,
together with a plastic tie fastening clip (thermal-break.net) R-20 plus
interior drywall. The roof is an EPDM roof system with an R20 Board insulation.
Building B Walls are constructed of 26 ga steel siding
(thermal bridge) steel stud, R20 batt insulation,
vapour barrier and drywall with the roof being WMP
10 vapour barrier attached 6" (R20) batt insulation
(un-insulated purlin and un-insulated floor. SOG
Allan Gillis, Free Lance Writer
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