A roof is the covering on the uppermost part of a building. A roof protects the building and its contents from the effects of weather. A roof protects primarily against rain. Depending upon the nature of the building, the roof may also protect against heat, sunlight, cold, snow and wind. Other types of structure, for example, a garden conservatory, might use roofing that protects against cold, wind and rain but admits light. Empire BCL uses the top of the line roofing materials from reputable manufacturers.