Fitting a flat rooflight is quicker than you might think. Atlas’s guide breaks it down into four clear steps, from running a bead of sealant around the kerb to tapping the cover trims into place. It also gives the recommended kerb sizes (a minimum 5 degree pitch and an 80mm width), so you can get the base right before the rooflight arrives.
Atlas Flat Rooflight Installation Guide
26 October 2026