Every component that was installed by Columbus - roof, siding, eavestroughs, aluminum trim, soffits - on our renovation had installation problems. A third of our roof had to be replaced due to poor roof installation (ripped tiles, unevenness, sloppiness), all siding on the new addition had to be replaced due to warping caused by improper installation, eavestroughs leaked shortly after installation on corners due to improper caulking and faulty pitch, etc, etc. Because contractor and Columbus had a falling out after installation, Columbus refused to remediate the deficiencies.