The phrase "shoddy construction" means that something was built poorly or with low-quality materials, making it prone to damage or failure. Full definition
The problems of building safe structures goes well beyond shoddy construction of school buildings in China and elsewhere. (dotearth.blogs.nytimes.com)
And as long as we can all come to terms with the fact the three little pigs» woes stemmed more from shoddy construction and being neighbors with a wolf blessed with extraordinary lung capacity than with their choice of materials, the preference for this environmentally and socially responsible building method should only continue to grow. (relevantmagazine.com)
It's unknown whether shoddy construction work or deferred maintenance may have contributed to this terrible event, though both seem to be strong possibilities. (effectivecoverage.com)