Interest
Proportion of Hacker News items mentioning "roof" over time.
Mentions
Total number of Hacker News items mentioning "roof" over time.
A roof is the top covering of a building, including all materials and constructions necessary to support it on the walls of the building or on uprights, providing protection against rain, snow, sunlight, extremes of temperature, and wind. A roof is part of the building envelope. Read more on Wikipedia