Heater slat, slat roof comprising the same and method for manufacturing the same

A louvred roof for a ground surface, the louvred roof comprising:

• a support structure with at least two girders extending parallel to each other along a longitudinal direction;
• a plurality of louvres installed next to each other viewed in said longitudinal direction and extending in a transverse direction substantially perpendicular to the longitudinal direction, each louvre of said plurality of louvres having two ends located opposite each other and connected to a respective one of the two girders,
• wherein one or more of the louvres is a heating louvre comprising:
• an underside;
• a cavity;
• a heating element fitted in said cavity;
• and
• a slot in said underside extending along at least a part of a length of said heating louvre, said slot providing access to said cavity,
• wherein, after the heating element is fitted in said cavity, the cavity is at least partially sealed by the heating element, and
• wherein the heating element is provided to heat a position between the louvred roof and the ground surface by radiant heat,
• wherein the louvres, at one end, comprise a louvre spindle and the one or more of the heating louvres, at one end, comprises a heating louvre spindle which has a larger diameter than the louvre spindle and in which a central passage is provided for a power cable,
• wherein at least one of the two girders is provided with a plurality of substantially identical openings,
• wherein the louvre spindle of the louvres is attached into one of the openings by a bearing, and
• wherein the heating louvre spindle of the one or more heating louvres is attached into one of the openings by a further bearing, the further bearing being thinner than the bearing.