WINDOWS
Our top-of-the-line, commercial quality windows from PLYCO are made specifically for post-frame steel buildings. They are constructed of 100% thermalized aluminum extrusions with 3/4-inch thermo pane glazing, and with options such as low E insulation and tinted glass they also deliver great energy savings year round.

INSULATION & VENTILATION
Any of our buildings can be customized to meet your lighting, ventilation, and heating and cooling requirements. After all, more natural light means less electricity burned, and more natural ventilation means lower heating and cooling costs.

REFLECTIVE INSULATION
O’Neil offers innovative insulating products from PLYCO and Guardian Building Products that are designed to reflect over 95% of infrared radiation, thereby significantly increasing the energy efficiency of your building.

CUPOLAS
Our Cupolas do more than just add a stylish cap to a building, they also increase its energy efficiency by greatly increasing ventilation. So this design option serves double duty as a performance option as well.

DURABLE FINISHES WITH “COOL” COLORS
Our Channeldrain 2000 Siding’s enhanced performance is a product of The SpectraCote System: the most tightly quality-coordinated manufacturing and paint finishing process in the industry. Plus, these colors are designed to resist the warming effects of the sun’s rays, increasing energy efficiency:

SOLAR PANELS
Ready to take your building “off the grid?” We can outfit your structure with cutting-edge solar panel system to handle everything from heating water to generating an independent source of electricity.

• O’Neil is a Capital Development  Board approved builder?
   
• We’re an approved supplier for the  state of Illinois with over 40 years of  experience?
   
• Our Engineering Department can  supply you sealed structural drawings, if needed?
   
• We’ve got decades of experience  satisfying municipality requirements  and building codes throughout southern Illinois and the entire Midwest?