Windscreen & windows. 3.4.1 - Windscreen : mandatory, one piece made from laminated glass or polycarbonate (thickness : 6 mm minimum) : a/ Minimum width at the bottom of the windscreen must be at least 65% of the overall width of the car (homologation form) and must not be less than 1200 mm. b/ As viewed from the front, the windscreen must be framed with four rounded angles, the upper line being almost horizontal (trapezoid shaped) ; c/ At the top of the windscreen, the curvature shall not exceed some centimetres above the horizontal chord of the arch (to ACO's assessment). d/ In order to protect the windscreen, the addition of a maximum of 4 translucent films on its external face is permitted e/ The addition of anti-intrusion bars is permitted on the internal face of the windscreen provided they are strongly fixed and they don’t hinder the driver’s vision.
