Metrotile's CF Shingle has been specifically designed to resemble the look of traditional Asphalt Shingles but without the inherent ongoing issues that many home owners face. Its innovative fully "Concealed Fastening" system is truly a world's first. Unlike other systems, which leave gaps and screws exposed to the elements, our unique CF Shingle protects all fastening elements making roofs more reliable, watertight and durable than ever before.