Clearview Skylights flat rooflight windows are available in various sizes. All skylights from Clearview Skylights are supplied with an easily fitted rebated timber kerb. It’s a fact……Flat glass roof lights will allow a lot more daylight to your home extension than vertical windows! Our flat roof skylight windows are 100% watertight and the self-cleaning glass will maximise the flood of natural daylight into your room. High Quality - Self-Cleaning - ClearView Skylights will fill your room with natural light.