The Beijing National Stadium, a.k.a. "the bird's nest" due to the "web of twisting steel sections that form the roof," is the world's largest enclosed space and largest steel structure.
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The windows are such an important part of your house, and installing, repairing or upgrading them is a huge decision. Pella doesn't simply build quality windows and doors. They've partnered with ENERGY STAR to offer energy-efficient options that help lower utility costs, enhance your home's comfort, and protect the environment.
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Choosing the right siding for your house that perfectly expresses who you are and protects your most valuable asset not only turns any house into a home — but adds great curbside value, too. This upgrade is a huge decision and there's much more to think about than just the price. That's why we use James Hardie.
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Replacing the roof of your house is a huge decision and there's much more to think about than just the price. Choosing the right shingle for your roof is important. We use Owens Corning because we are a preferred contractor, which gives us discounted pricing that we pass on to our customers!
China Architecture Design and Research Group